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authorStefan Reinauer <stepan@openbios.org>2006-10-14 21:35:30 +0000
committerStefan Reinauer <stepan@openbios.org>2006-10-14 21:35:30 +0000
commitc1c3fdc79fab5b0d1572ea8f606c280b2df9676c (patch)
tree5cb58e91d722314d36403928d37c374c97403dea /util/ADLO/bochs
parent5ed51d19331945915d2a879d11d72a7d1a8751b7 (diff)
add ADLO to v2
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2457 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'util/ADLO/bochs')
-rw-r--r--util/ADLO/bochs/bios/Makefile50
-rw-r--r--util/ADLO/bochs/bios/README1
-rw-r--r--util/ADLO/bochs/bios/rombios.c10551
3 files changed, 10602 insertions, 0 deletions
diff --git a/util/ADLO/bochs/bios/Makefile b/util/ADLO/bochs/bios/Makefile
new file mode 100644
index 0000000000..e73bdc5f04
--- /dev/null
+++ b/util/ADLO/bochs/bios/Makefile
@@ -0,0 +1,50 @@
+# Copyright (C) 2001 MandrakeSoft S.A.
+#
+# MandrakeSoft S.A.
+# 43, rue d'Aboukir
+# 75002 Paris - France
+# http://www.linux-mandrake.com/
+# http://www.mandrakesoft.com/
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+# Makefile for the BIOS component of bochs
+
+.SUFFIXES: .cc
+
+# -------- end configurable options --------------------------
+
+.cc.o:
+ $(CXX) -c $(CXXFLAGS) $(LOCAL_CXXFLAGS) $(BX_INCDIRS) $< -o $@
+
+bios: rombios.bin
+
+rombios.bin: rombios.c
+ gcc -E -P $< > _rombios_.c
+ bcc -o rombios.s -C-c -D__i86__ -0 -S _rombios_.c
+ sed -e 's/^\.text//' -e 's/^\.data//' rombios.s > _rombios_.s
+ as86 _rombios_.s -b rombios.bin -u- -w- -g -0 -j -O -l rombios.txt
+ ls -l rombios.bin
+
+# -----------------------------------------------------------------
+
+clean:
+ rm -f *.s
+ rm -f _rombios_.c
+ rm -f rombios.txt
+ rm -f rombios.bin
+
+
+# -----------------------------------------------------------------
diff --git a/util/ADLO/bochs/bios/README b/util/ADLO/bochs/bios/README
new file mode 100644
index 0000000000..b6b9549823
--- /dev/null
+++ b/util/ADLO/bochs/bios/README
@@ -0,0 +1 @@
+The bochs bios.
diff --git a/util/ADLO/bochs/bios/rombios.c b/util/ADLO/bochs/bios/rombios.c
new file mode 100644
index 0000000000..3a4688ed27
--- /dev/null
+++ b/util/ADLO/bochs/bios/rombios.c
@@ -0,0 +1,10551 @@
+/////////////////////////////////////////////////////////////////////////
+// $Id: rombios.c,v 1.163 2006/07/07 16:10:37 vruppert Exp $
+/////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2002 MandrakeSoft S.A.
+//
+// MandrakeSoft S.A.
+// 43, rue d'Aboukir
+// 75002 Paris - France
+// http://www.linux-mandrake.com/
+// http://www.mandrakesoft.com/
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+// ROM BIOS for use with Bochs/Plex x86 emulation environment
+
+
+// ROM BIOS compatability entry points:
+// ===================================
+// $e05b ; POST Entry Point
+// $e2c3 ; NMI Handler Entry Point
+// $e3fe ; INT 13h Fixed Disk Services Entry Point
+// $e401 ; Fixed Disk Parameter Table
+// $e6f2 ; INT 19h Boot Load Service Entry Point
+// $e6f5 ; Configuration Data Table
+// $e729 ; Baud Rate Generator Table
+// $e739 ; INT 14h Serial Communications Service Entry Point
+// $e82e ; INT 16h Keyboard Service Entry Point
+// $e987 ; INT 09h Keyboard Service Entry Point
+// $ec59 ; INT 13h Diskette Service Entry Point
+// $ef57 ; INT 0Eh Diskette Hardware ISR Entry Point
+// $efc7 ; Diskette Controller Parameter Table
+// $efd2 ; INT 17h Printer Service Entry Point
+// $f045 ; INT 10 Functions 0-Fh Entry Point
+// $f065 ; INT 10h Video Support Service Entry Point
+// $f0a4 ; MDA/CGA Video Parameter Table (INT 1Dh)
+// $f841 ; INT 12h Memory Size Service Entry Point
+// $f84d ; INT 11h Equipment List Service Entry Point
+// $f859 ; INT 15h System Services Entry Point
+// $fa6e ; Character Font for 320x200 & 640x200 Graphics (lower 128 characters)
+// $fe6e ; INT 1Ah Time-of-day Service Entry Point
+// $fea5 ; INT 08h System Timer ISR Entry Point
+// $fef3 ; Initial Interrupt Vector Offsets Loaded by POST
+// $ff53 ; IRET Instruction for Dummy Interrupt Handler
+// $ff54 ; INT 05h Print Screen Service Entry Point
+// $fff0 ; Power-up Entry Point
+// $fff5 ; ASCII Date ROM was built - 8 characters in MM/DD/YY
+// $fffe ; System Model ID
+
+// NOTES for ATA/ATAPI driver (cbbochs@free.fr)
+// Features
+// - supports up to 4 ATA interfaces
+// - device/geometry detection
+// - 16bits/32bits device access
+// - pchs/lba access
+// - datain/dataout/packet command support
+//
+// NOTES for El-Torito Boot (cbbochs@free.fr)
+// - CD-ROM booting is only available if ATA/ATAPI Driver is available
+// - Current code is only able to boot mono-session cds
+// - Current code can not boot and emulate a hard-disk
+// the bios will panic otherwise
+// - Current code also use memory in EBDA segement.
+// - I used cmos byte 0x3D to store extended information on boot-device
+// - Code has to be modified modified to handle multiple cdrom drives
+// - Here are the cdrom boot failure codes:
+// 1 : no atapi device found
+// 2 : no atapi cdrom found
+// 3 : can not read cd - BRVD
+// 4 : cd is not eltorito (BRVD)
+// 5 : cd is not eltorito (ISO TAG)
+// 6 : cd is not eltorito (ELTORITO TAG)
+// 7 : can not read cd - boot catalog
+// 8 : boot catalog : bad header
+// 9 : boot catalog : bad platform
+// 10 : boot catalog : bad signature
+// 11 : boot catalog : bootable flag not set
+// 12 : can not read cd - boot image
+//
+// ATA driver
+// - EBDA segment.
+// I used memory starting at 0x121 in the segment
+// - the translation policy is defined in cmos regs 0x39 & 0x3a
+//
+// TODO :
+//
+// int74
+// - needs to be reworked. Uses direct [bp] offsets. (?)
+//
+// int13:
+// - f04 (verify sectors) isn't complete (?)
+// - f02/03/04 should set current cyl,etc in BDA (?)
+// - rewrite int13_relocated & clean up int13 entry code
+//
+// NOTES:
+// - NMI access (bit7 of addr written to 70h)
+//
+// ATA driver
+// - should handle the "don't detect" bit (cmos regs 0x3b & 0x3c)
+// - could send the multiple-sector read/write commands
+//
+// El-Torito
+// - Emulate a Hard-disk (currently only diskette can be emulated) see "FIXME ElTorito Harddisk"
+// - Implement remaining int13_cdemu functions (as defined by El-Torito specs)
+// - cdrom drive is hardcoded to ide 0 device 1 in several places. see "FIXME ElTorito Hardcoded"
+// - int13 Fix DL when emulating a cd. In that case DL is decremented before calling real int13.
+// This is ok. But DL should be reincremented afterwards.
+// - Fix all "FIXME ElTorito Various"
+// - should be able to boot any cdrom instead of the first one
+//
+// BCC Bug: find a generic way to handle the bug of #asm after an "if" (fixed in 0.16.7)
+
+#define DEBUG_ROMBIOS 1
+
+#define DEBUG_ATA 0
+#define DEBUG_INT13_HD 0
+#define DEBUG_INT13_CD 0
+#define DEBUG_INT13_ET 0
+#define DEBUG_INT13_FL 0
+#define DEBUG_INT15 0
+#define DEBUG_INT16 0
+#define DEBUG_INT1A 0
+#define DEBUG_INT74 0
+#define DEBUG_APM 0
+
+#define BX_CPU 3
+#define BX_USE_PS2_MOUSE 1
+#define BX_CALL_INT15_4F 1
+#define BX_USE_EBDA 1
+#define BX_SUPPORT_FLOPPY 1
+#define BX_FLOPPY_ON_CNT 37 /* 2 seconds */
+//#define BX_PCIBIOS 1
+#define BX_APM 0
+
+#define LINUXBIOS 1
+
+#define BX_USE_ATADRV 1
+//#define BX_ELTORITO_BOOT 1
+
+#define BX_MAX_ATA_INTERFACES 4
+#define BX_MAX_ATA_DEVICES (BX_MAX_ATA_INTERFACES*2)
+
+#define BX_VIRTUAL_PORTS 1 /* normal output to Bochs ports */
+#define BX_DEBUG_SERIAL 1 /* output to COM1 */
+
+ /* model byte 0xFC = AT */
+#define SYS_MODEL_ID 0xFC
+#define SYS_SUBMODEL_ID 0x00
+#define BIOS_REVISION 1
+#define BIOS_CONFIG_TABLE 0xe6f5
+
+#ifndef BIOS_BUILD_DATE
+# define BIOS_BUILD_DATE "06/23/99"
+#endif
+
+ // 1K of base memory used for Extended Bios Data Area (EBDA)
+ // EBDA is used for PS/2 mouse support, and IDE BIOS, etc.
+#define EBDA_SEG 0x9FC0
+#define EBDA_SIZE 1 // In KiB
+#define BASE_MEM_IN_K (640 - EBDA_SIZE)
+
+ // Define the application NAME
+#ifdef PLEX86
+# define BX_APPNAME "Plex86"
+#else
+# define BX_APPNAME "Bochs"
+#endif
+
+ // Sanity Checks
+#if BX_USE_ATADRV && BX_CPU<3
+# error The ATA/ATAPI Driver can only to be used with a 386+ cpu
+#endif
+#if BX_USE_ATADRV && !BX_USE_EBDA
+# error ATA/ATAPI Driver can only be used if EBDA is available
+#endif
+#if BX_ELTORITO_BOOT && !BX_USE_ATADRV
+# error El-Torito Boot can only be use if ATA/ATAPI Driver is available
+#endif
+#if BX_PCIBIOS && BX_CPU<3
+# error PCI BIOS can only be used with 386+ cpu
+#endif
+#if BX_APM && BX_CPU<3
+# error APM BIOS can only be used with 386+ cpu
+#endif
+
+#define PANIC_PORT 0x400
+#define PANIC_PORT2 0x401
+#define INFO_PORT 0x402
+#define DEBUG_PORT 0x403
+
+// define this if you want to make PCIBIOS working on a specific bridge only
+// undef enables PCIBIOS when at least one PCI device is found
+// i440FX is emulated by Bochs and QEMU
+#define PCI_FIXED_HOST_BRIDGE 0x12378086 ;; i440FX PCI bridge
+
+// #20 is dec 20
+// #$20 is hex 20 = 32
+// #0x20 is hex 20 = 32
+// LDA #$20
+// JSR $E820
+// LDD .i,S
+// JSR $C682
+// mov al, #$20
+
+// all hex literals should be prefixed with '0x'
+// grep "#[0-9a-fA-F][0-9a-fA-F]" rombios.c
+// no mov SEG-REG, #value, must mov register into seg-reg
+// grep -i "mov[ ]*.s" rombios.c
+
+// This is for compiling with gcc2 and gcc3
+#define ASM_START #asm
+#define ASM_END #endasm
+
+ASM_START
+.rom
+
+.org 0x0000
+
+#if BX_CPU >= 3
+use16 386
+#else
+use16 286
+#endif
+
+MACRO HALT
+ ;; the HALT macro is called with the line number of the HALT call.
+ ;; The line number is then sent to the PANIC_PORT, causing Bochs/Plex
+ ;; to print a BX_PANIC message. This will normally halt the simulation
+ ;; with a message such as "BIOS panic at rombios.c, line 4091".
+ ;; However, users can choose to make panics non-fatal and continue.
+#if BX_VIRTUAL_PORTS
+ mov dx,#PANIC_PORT
+ mov ax,#?1
+ out dx,ax
+#else
+ mov dx,#0x80
+ mov ax,#?1
+ out dx,al
+#endif
+MEND
+
+MACRO JMP_AP
+ db 0xea
+ dw ?2
+ dw ?1
+MEND
+
+MACRO SET_INT_VECTOR
+ mov ax, ?3
+ mov ?1*4, ax
+ mov ax, ?2
+ mov ?1*4+2, ax
+MEND
+
+ASM_END
+
+typedef unsigned char Bit8u;
+typedef unsigned short Bit16u;
+typedef unsigned short bx_bool;
+typedef unsigned long Bit32u;
+
+#if BX_USE_ATADRV
+
+ void memsetb(seg,offset,value,count);
+ void memcpyb(dseg,doffset,sseg,soffset,count);
+ void memcpyd(dseg,doffset,sseg,soffset,count);
+
+ // memset of count bytes
+ void
+ memsetb(seg,offset,value,count)
+ Bit16u seg;
+ Bit16u offset;
+ Bit16u value;
+ Bit16u count;
+ {
+ ASM_START
+ push bp
+ mov bp, sp
+
+ push ax
+ push cx
+ push es
+ push di
+
+ mov cx, 10[bp] ; count
+ cmp cx, #0x00
+ je memsetb_end
+ mov ax, 4[bp] ; segment
+ mov es, ax
+ mov ax, 6[bp] ; offset
+ mov di, ax
+ mov al, 8[bp] ; value
+ cld
+ rep
+ stosb
+
+ memsetb_end:
+ pop di
+ pop es
+ pop cx
+ pop ax
+
+ pop bp
+ ASM_END
+ }
+
+#if 0
+ // memcpy of count bytes
+ void
+ memcpyb(dseg,doffset,sseg,soffset,count)
+ Bit16u dseg;
+ Bit16u doffset;
+ Bit16u sseg;
+ Bit16u soffset;
+ Bit16u count;
+ {
+ ASM_START
+ push bp
+ mov bp, sp
+
+ push ax
+ push cx
+ push es
+ push di
+ push ds
+ push si
+
+ mov cx, 12[bp] ; count
+ cmp cx, #0x0000
+ je memcpyb_end
+ mov ax, 4[bp] ; dsegment
+ mov es, ax
+ mov ax, 6[bp] ; doffset
+ mov di, ax
+ mov ax, 8[bp] ; ssegment
+ mov ds, ax
+ mov ax, 10[bp] ; soffset
+ mov si, ax
+ cld
+ rep
+ movsb
+
+ memcpyb_end:
+ pop si
+ pop ds
+ pop di
+ pop es
+ pop cx
+ pop ax
+
+ pop bp
+ ASM_END
+ }
+
+ // memcpy of count dword
+ void
+ memcpyd(dseg,doffset,sseg,soffset,count)
+ Bit16u dseg;
+ Bit16u doffset;
+ Bit16u sseg;
+ Bit16u soffset;
+ Bit16u count;
+ {
+ ASM_START
+ push bp
+ mov bp, sp
+
+ push ax
+ push cx
+ push es
+ push di
+ push ds
+ push si
+
+ mov cx, 12[bp] ; count
+ cmp cx, #0x0000
+ je memcpyd_end
+ mov ax, 4[bp] ; dsegment
+ mov es, ax
+ mov ax, 6[bp] ; doffset
+ mov di, ax
+ mov ax, 8[bp] ; ssegment
+ mov ds, ax
+ mov ax, 10[bp] ; soffset
+ mov si, ax
+ cld
+ rep
+ movsd
+
+ memcpyd_end:
+ pop si
+ pop ds
+ pop di
+ pop es
+ pop cx
+ pop ax
+
+ pop bp
+ ASM_END
+ }
+#endif
+#endif //BX_USE_ATADRV
+
+ // read_dword and write_dword functions
+ static Bit32u read_dword();
+ static void write_dword();
+
+ Bit32u
+ read_dword(seg, offset)
+ Bit16u seg;
+ Bit16u offset;
+ {
+ ASM_START
+ push bp
+ mov bp, sp
+
+ push bx
+ push ds
+ mov ax, 4[bp] ; segment
+ mov ds, ax
+ mov bx, 6[bp] ; offset
+ mov ax, [bx]
+ inc bx
+ inc bx
+ mov dx, [bx]
+ ;; ax = return value (word)
+ ;; dx = return value (word)
+ pop ds
+ pop bx
+
+ pop bp
+ ASM_END
+ }
+
+ void
+ write_dword(seg, offset, data)
+ Bit16u seg;
+ Bit16u offset;
+ Bit32u data;
+ {
+ ASM_START
+ push bp
+ mov bp, sp
+
+ push ax
+ push bx
+ push ds
+ mov ax, 4[bp] ; segment
+ mov ds, ax
+ mov bx, 6[bp] ; offset
+ mov ax, 8[bp] ; data word
+ mov [bx], ax ; write data word
+ inc bx
+ inc bx
+ mov ax, 10[bp] ; data word
+ mov [bx], ax ; write data word
+ pop ds
+ pop bx
+ pop ax
+
+ pop bp
+ ASM_END
+ }
+
+ // Bit32u (unsigned long) and long helper functions
+ ASM_START
+
+ ;; and function
+ landl:
+ landul:
+ SEG SS
+ and ax,[di]
+ SEG SS
+ and bx,2[di]
+ ret
+
+ ;; add function
+ laddl:
+ laddul:
+ SEG SS
+ add ax,[di]
+ SEG SS
+ adc bx,2[di]
+ ret
+
+ ;; cmp function
+ lcmpl:
+ lcmpul:
+ and eax, #0x0000FFFF
+ shl ebx, #16
+ add eax, ebx
+ shr ebx, #16
+ SEG SS
+ cmp eax, dword ptr [di]
+ ret
+
+ ;; sub function
+ lsubl:
+ lsubul:
+ SEG SS
+ sub ax,[di]
+ SEG SS
+ sbb bx,2[di]
+ ret
+
+ ;; mul function
+ lmull:
+ lmulul:
+ and eax, #0x0000FFFF
+ shl ebx, #16
+ add eax, ebx
+ SEG SS
+ mul eax, dword ptr [di]
+ mov ebx, eax
+ shr ebx, #16
+ ret
+
+ ;; dec function
+ ldecl:
+ ldecul:
+ SEG SS
+ dec dword ptr [bx]
+ ret
+
+ ;; or function
+ lorl:
+ lorul:
+ SEG SS
+ or ax,[di]
+ SEG SS
+ or bx,2[di]
+ ret
+
+ ;; inc function
+ lincl:
+ lincul:
+ SEG SS
+ inc dword ptr [bx]
+ ret
+
+ ;; tst function
+ ltstl:
+ ltstul:
+ and eax, #0x0000FFFF
+ shl ebx, #16
+ add eax, ebx
+ shr ebx, #16
+ test eax, eax
+ ret
+
+ ;; sr function
+ lsrul:
+ mov cx,di
+ jcxz lsr_exit
+ and eax, #0x0000FFFF
+ shl ebx, #16
+ add eax, ebx
+ lsr_loop:
+ shr eax, #1
+ loop lsr_loop
+ mov ebx, eax
+ shr ebx, #16
+ lsr_exit:
+ ret
+
+ ;; sl function
+ lsll:
+ lslul:
+ mov cx,di
+ jcxz lsl_exit
+ and eax, #0x0000FFFF
+ shl ebx, #16
+ add eax, ebx
+ lsl_loop:
+ shl eax, #1
+ loop lsl_loop
+ mov ebx, eax
+ shr ebx, #16
+ lsl_exit:
+ ret
+
+ idiv_:
+ cwd
+ idiv bx
+ ret
+
+ idiv_u:
+ xor dx,dx
+ div bx
+ ret
+
+ ldivul:
+ and eax, #0x0000FFFF
+ shl ebx, #16
+ add eax, ebx
+ xor edx, edx
+ SEG SS
+ mov bx, 2[di]
+ shl ebx, #16
+ SEG SS
+ mov bx, [di]
+ div ebx
+ mov ebx, eax
+ shr ebx, #16
+ ret
+
+ ASM_END
+
+// for access to RAM area which is used by interrupt vectors
+// and BIOS Data Area
+
+typedef struct {
+ unsigned char filler1[0x400];
+ unsigned char filler2[0x6c];
+ Bit16u ticks_low;
+ Bit16u ticks_high;
+ Bit8u midnight_flag;
+ } bios_data_t;
+
+#define BiosData ((bios_data_t *) 0)
+
+#if BX_USE_ATADRV
+ typedef struct {
+ Bit16u heads; // # heads
+ Bit16u cylinders; // # cylinders
+ Bit16u spt; // # sectors / track
+ } chs_t;
+
+ // DPTE definition
+ typedef struct {
+ Bit16u iobase1;
+ Bit16u iobase2;
+ Bit8u prefix;
+ Bit8u unused;
+ Bit8u irq;
+ Bit8u blkcount;
+ Bit8u dma;
+ Bit8u pio;
+ Bit16u options;
+ Bit16u reserved;
+ Bit8u revision;
+ Bit8u checksum;
+ } dpte_t;
+
+ typedef struct {
+ Bit8u iface; // ISA or PCI
+ Bit16u iobase1; // IO Base 1
+ Bit16u iobase2; // IO Base 2
+ Bit8u irq; // IRQ
+ } ata_channel_t;
+
+ typedef struct {
+ Bit8u type; // Detected type of ata (ata/atapi/none/unknown)
+ Bit8u device; // Detected type of attached devices (hd/cd/none)
+ Bit8u removable; // Removable device flag
+ Bit8u lock; // Locks for removable devices
+ // Bit8u lba_capable; // LBA capable flag - always yes for bochs devices
+ Bit8u mode; // transfert mode : PIO 16/32 bits - IRQ - ISADMA - PCIDMA
+ Bit16u blksize; // block size
+
+ Bit8u translation; // type of translation
+ chs_t lchs; // Logical CHS
+ chs_t pchs; // Physical CHS
+
+ Bit32u sectors; // Total sectors count
+ } ata_device_t;
+
+ typedef struct {
+ // ATA channels info
+ ata_channel_t channels[BX_MAX_ATA_INTERFACES];
+
+ // ATA devices info
+ ata_device_t devices[BX_MAX_ATA_DEVICES];
+ //
+ // map between (bios hd id - 0x80) and ata channels
+ Bit8u hdcount, hdidmap[BX_MAX_ATA_DEVICES];
+
+ // map between (bios cd id - 0xE0) and ata channels
+ Bit8u cdcount, cdidmap[BX_MAX_ATA_DEVICES];
+
+ // Buffer for DPTE table
+ dpte_t dpte;
+
+ // Count of transferred sectors and bytes
+ Bit16u trsfsectors;
+ Bit32u trsfbytes;
+
+ } ata_t;
+
+#if BX_ELTORITO_BOOT
+ // ElTorito Device Emulation data
+ typedef struct {
+ Bit8u active;
+ Bit8u media;
+ Bit8u emulated_drive;
+ Bit8u controller_index;
+ Bit16u device_spec;
+ Bit32u ilba;
+ Bit16u buffer_segment;
+ Bit16u load_segment;
+ Bit16u sector_count;
+
+ // Virtual device
+ chs_t vdevice;
+ } cdemu_t;
+#endif // BX_ELTORITO_BOOT
+
+ // for access to EBDA area
+ // The EBDA structure should conform to
+ // http://www.frontiernet.net/~fys/rombios.htm document
+ // I made the ata and cdemu structs begin at 0x121 in the EBDA seg
+ typedef struct {
+ unsigned char filler1[0x3D];
+
+ // FDPT - Can be splitted in data members if needed
+ unsigned char fdpt0[0x10];
+ unsigned char fdpt1[0x10];
+
+ unsigned char filler2[0xC4];
+
+ // ATA Driver data
+ ata_t ata;
+
+#if BX_ELTORITO_BOOT
+ // El Torito Emulation data
+ cdemu_t cdemu;
+#endif // BX_ELTORITO_BOOT
+
+ } ebda_data_t;
+
+ #define EbdaData ((ebda_data_t *) 0)
+
+ // for access to the int13ext structure
+ typedef struct {
+ Bit8u size;
+ Bit8u reserved;
+ Bit16u count;
+ Bit16u offset;
+ Bit16u segment;
+ Bit32u lba1;
+ Bit32u lba2;
+ } int13ext_t;
+
+ #define Int13Ext ((int13ext_t *) 0)
+
+ // Disk Physical Table definition
+ typedef struct {
+ Bit16u size;
+ Bit16u infos;
+ Bit32u cylinders;
+ Bit32u heads;
+ Bit32u spt;
+ Bit32u sector_count1;
+ Bit32u sector_count2;
+ Bit16u blksize;
+ Bit16u dpte_segment;
+ Bit16u dpte_offset;
+ Bit16u key;
+ Bit8u dpi_length;
+ Bit8u reserved1;
+ Bit16u reserved2;
+ Bit8u host_bus[4];
+ Bit8u iface_type[8];
+ Bit8u iface_path[8];
+ Bit8u device_path[8];
+ Bit8u reserved3;
+ Bit8u checksum;
+ } dpt_t;
+
+ #define Int13DPT ((dpt_t *) 0)
+
+#endif // BX_USE_ATADRV
+
+typedef struct {
+ union {
+ struct {
+ Bit16u di, si, bp, sp;
+ Bit16u bx, dx, cx, ax;
+ } r16;
+ struct {
+ Bit16u filler[4];
+ Bit8u bl, bh, dl, dh, cl, ch, al, ah;
+ } r8;
+ } u;
+ } pusha_regs_t;
+
+typedef struct {
+ union {
+ struct {
+ Bit32u edi, esi, ebp, esp;
+ Bit32u ebx, edx, ecx, eax;
+ } r32;
+ struct {
+ Bit16u di, filler1, si, filler2, bp, filler3, sp, filler4;
+ Bit16u bx, filler5, dx, filler6, cx, filler7, ax, filler8;
+ } r16;
+ struct {
+ Bit32u filler[4];
+ Bit8u bl, bh;
+ Bit16u filler1;
+ Bit8u dl, dh;
+ Bit16u filler2;
+ Bit8u cl, ch;
+ Bit16u filler3;
+ Bit8u al, ah;
+ Bit16u filler4;
+ } r8;
+ } u;
+} pushad_regs_t;
+
+typedef struct {
+ union {
+ struct {
+ Bit16u flags;
+ } r16;
+ struct {
+ Bit8u flagsl;
+ Bit8u flagsh;
+ } r8;
+ } u;
+ } flags_t;
+
+#define SetCF(x) x.u.r8.flagsl |= 0x01
+#define SetZF(x) x.u.r8.flagsl |= 0x40
+#define ClearCF(x) x.u.r8.flagsl &= 0xfe
+#define ClearZF(x) x.u.r8.flagsl &= 0xbf
+#define GetCF(x) (x.u.r8.flagsl & 0x01)
+
+typedef struct {
+ Bit16u ip;
+ Bit16u cs;
+ flags_t flags;
+ } iret_addr_t;
+
+
+
+static Bit8u inb();
+static Bit8u inb_cmos();
+static void outb();
+static void outb_cmos();
+static Bit16u inw();
+static void outw();
+static void init_rtc();
+static bx_bool rtc_updating();
+
+static Bit8u read_byte();
+static Bit16u read_word();
+static void write_byte();
+static void write_word();
+static void bios_printf();
+
+static Bit8u inhibit_mouse_int_and_events();
+static void enable_mouse_int_and_events();
+static Bit8u send_to_mouse_ctrl();
+static Bit8u get_mouse_data();
+static void set_kbd_command_byte();
+
+static void int09_function();
+static void int13_harddisk();
+static void int13_cdrom();
+static void int13_cdemu();
+static void int13_eltorito();
+static void int13_diskette_function();
+static void int14_function();
+static void int15_function();
+static void int16_function();
+static void int17_function();
+static Bit32u int19_function();
+static void int1a_function();
+static void int70_function();
+static void int74_function();
+static Bit16u get_CS();
+static Bit16u get_SS();
+static unsigned int enqueue_key();
+static unsigned int dequeue_key();
+static void get_hd_geometry();
+static void set_diskette_ret_status();
+static void set_diskette_current_cyl();
+static void determine_floppy_media();
+static bx_bool floppy_drive_exists();
+static bx_bool floppy_drive_recal();
+static bx_bool floppy_media_known();
+static bx_bool floppy_media_sense();
+static bx_bool set_enable_a20();
+static void debugger_on();
+static void debugger_off();
+static void keyboard_init();
+static void keyboard_panic();
+static void shutdown_status_panic();
+static void nmi_handler_msg();
+
+static void print_bios_banner();
+static void print_boot_device();
+static void print_boot_failure();
+static void print_cdromboot_failure();
+
+# if BX_USE_ATADRV
+
+// ATA / ATAPI driver
+void ata_init();
+void ata_detect();
+void ata_reset();
+
+Bit16u ata_cmd_non_data();
+Bit16u ata_cmd_data_in();
+Bit16u ata_cmd_data_out();
+Bit16u ata_cmd_packet();
+
+Bit16u atapi_get_sense();
+Bit16u atapi_is_ready();
+Bit16u atapi_is_cdrom();
+
+#endif // BX_USE_ATADRV
+
+#if BX_ELTORITO_BOOT
+
+void cdemu_init();
+Bit8u cdemu_isactive();
+Bit8u cdemu_emulated_drive();
+
+Bit16u cdrom_boot();
+
+#endif // BX_ELTORITO_BOOT
+
+static char bios_cvs_version_string[] = "$Revision: 1.163 $ $Date: 2006/07/07 16:10:37 $";
+
+#define BIOS_COPYRIGHT_STRING "(c) 2002 MandrakeSoft S.A. Written by Kevin Lawton & the Bochs team."
+
+#define BIOS_PRINTF_HALT 1
+#define BIOS_PRINTF_SCREEN 2
+#define BIOS_PRINTF_INFO 4
+#define BIOS_PRINTF_DEBUG 8
+#define BIOS_PRINTF_ALL (BIOS_PRINTF_SCREEN | BIOS_PRINTF_INFO)
+#define BIOS_PRINTF_DEBHALT (BIOS_PRINTF_SCREEN | BIOS_PRINTF_INFO | BIOS_PRINTF_HALT)
+
+#define printf(format, p...) bios_printf(BIOS_PRINTF_SCREEN, format, ##p)
+
+// Defines the output macros.
+// BX_DEBUG goes to INFO port until we can easily choose debug info on a
+// per-device basis. Debug info are sent only in debug mode
+#if DEBUG_ROMBIOS
+# define BX_DEBUG(format, p...) bios_printf(BIOS_PRINTF_INFO, format, ##p)
+#else
+# define BX_DEBUG(format, p...)
+#endif
+#define BX_INFO(format, p...) bios_printf(BIOS_PRINTF_INFO, format, ##p)
+#define BX_PANIC(format, p...) bios_printf(BIOS_PRINTF_DEBHALT, format, ##p)
+
+#if DEBUG_ATA
+# define BX_DEBUG_ATA(a...) BX_DEBUG(a)
+#else
+# define BX_DEBUG_ATA(a...)
+#endif
+#if DEBUG_INT13_HD
+# define BX_DEBUG_INT13_HD(a...) BX_DEBUG(a)
+#else
+# define BX_DEBUG_INT13_HD(a...)
+#endif
+#if DEBUG_INT13_CD
+# define BX_DEBUG_INT13_CD(a...) BX_DEBUG(a)
+#else
+# define BX_DEBUG_INT13_CD(a...)
+#endif
+#if DEBUG_INT13_ET
+# define BX_DEBUG_INT13_ET(a...) BX_DEBUG(a)
+#else
+# define BX_DEBUG_INT13_ET(a...)
+#endif
+#if DEBUG_INT13_FL
+# define BX_DEBUG_INT13_FL(a...) BX_DEBUG(a)
+#else
+# define BX_DEBUG_INT13_FL(a...)
+#endif
+#if DEBUG_INT15
+# define BX_DEBUG_INT15(a...) BX_DEBUG(a)
+#else
+# define BX_DEBUG_INT15(a...)
+#endif
+#if DEBUG_INT16
+# define BX_DEBUG_INT16(a...) BX_DEBUG(a)
+#else
+# define BX_DEBUG_INT16(a...)
+#endif
+#if DEBUG_INT1A
+# define BX_DEBUG_INT1A(a...) BX_DEBUG(a)
+#else
+# define BX_DEBUG_INT1A(a...)
+#endif
+#if DEBUG_INT74
+# define BX_DEBUG_INT74(a...) BX_DEBUG(a)
+#else
+# define BX_DEBUG_INT74(a...)
+#endif
+
+#define SET_AL(val8) AX = ((AX & 0xff00) | (val8))
+#define SET_BL(val8) BX = ((BX & 0xff00) | (val8))
+#define SET_CL(val8) CX = ((CX & 0xff00) | (val8))
+#define SET_DL(val8) DX = ((DX & 0xff00) | (val8))
+#define SET_AH(val8) AX = ((AX & 0x00ff) | ((val8) << 8))
+#define SET_BH(val8) BX = ((BX & 0x00ff) | ((val8) << 8))
+#define SET_CH(val8) CX = ((CX & 0x00ff) | ((val8) << 8))
+#define SET_DH(val8) DX = ((DX & 0x00ff) | ((val8) << 8))
+
+#define GET_AL() ( AX & 0x00ff )
+#define GET_BL() ( BX & 0x00ff )
+#define GET_CL() ( CX & 0x00ff )
+#define GET_DL() ( DX & 0x00ff )
+#define GET_AH() ( AX >> 8 )
+#define GET_BH() ( BX >> 8 )
+#define GET_CH() ( CX >> 8 )
+#define GET_DH() ( DX >> 8 )
+
+#define GET_ELDL() ( ELDX & 0x00ff )
+#define GET_ELDH() ( ELDX >> 8 )
+
+#define SET_CF() FLAGS |= 0x0001
+#define CLEAR_CF() FLAGS &= 0xfffe
+#define GET_CF() (FLAGS & 0x0001)
+
+#define SET_ZF() FLAGS |= 0x0040
+#define CLEAR_ZF() FLAGS &= 0xffbf
+#define GET_ZF() (FLAGS & 0x0040)
+
+#define UNSUPPORTED_FUNCTION 0x86
+
+#define none 0
+#define MAX_SCAN_CODE 0x58
+
+static struct {
+ Bit16u normal;
+ Bit16u shift;
+ Bit16u control;
+ Bit16u alt;
+ Bit8u lock_flags;
+ } scan_to_scanascii[MAX_SCAN_CODE + 1] = {
+ { none, none, none, none, none },
+ { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */
+ { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */
+ { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */
+ { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */
+ { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */
+ { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */
+ { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */
+ { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */
+ { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */
+ { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */
+ { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */
+ { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */
+ { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */
+ { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */
+ { 0x0f09, 0x0f00, none, none, none }, /* tab */
+ { 0x1071, 0x1051, 0x1011, 0x1000, 0x40 }, /* Q */
+ { 0x1177, 0x1157, 0x1117, 0x1100, 0x40 }, /* W */
+ { 0x1265, 0x1245, 0x1205, 0x1200, 0x40 }, /* E */
+ { 0x1372, 0x1352, 0x1312, 0x1300, 0x40 }, /* R */
+ { 0x1474, 0x1454, 0x1414, 0x1400, 0x40 }, /* T */
+ { 0x1579, 0x1559, 0x1519, 0x1500, 0x40 }, /* Y */
+ { 0x1675, 0x1655, 0x1615, 0x1600, 0x40 }, /* U */
+ { 0x1769, 0x1749, 0x1709, 0x1700, 0x40 }, /* I */
+ { 0x186f, 0x184f, 0x180f, 0x1800, 0x40 }, /* O */
+ { 0x1970, 0x1950, 0x1910, 0x1900, 0x40 }, /* P */
+ { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */
+ { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */
+ { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */
+ { none, none, none, none, none }, /* L Ctrl */
+ { 0x1e61, 0x1e41, 0x1e01, 0x1e00, 0x40 }, /* A */
+ { 0x1f73, 0x1f53, 0x1f13, 0x1f00, 0x40 }, /* S */
+ { 0x2064, 0x2044, 0x2004, 0x2000, 0x40 }, /* D */
+ { 0x2166, 0x2146, 0x2106, 0x2100, 0x40 }, /* F */
+ { 0x2267, 0x2247, 0x2207, 0x2200, 0x40 }, /* G */
+ { 0x2368, 0x2348, 0x2308, 0x2300, 0x40 }, /* H */
+ { 0x246a, 0x244a, 0x240a, 0x2400, 0x40 }, /* J */
+ { 0x256b, 0x254b, 0x250b, 0x2500, 0x40 }, /* K */
+ { 0x266c, 0x264c, 0x260c, 0x2600, 0x40 }, /* L */
+ { 0x273b, 0x273a, none, none, none }, /* ;: */
+ { 0x2827, 0x2822, none, none, none }, /* '" */
+ { 0x2960, 0x297e, none, none, none }, /* `~ */
+ { none, none, none, none, none }, /* L shift */
+ { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */
+ { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, 0x40 }, /* Z */
+ { 0x2d78, 0x2d58, 0x2d18, 0x2d00, 0x40 }, /* X */
+ { 0x2e63, 0x2e43, 0x2e03, 0x2e00, 0x40 }, /* C */
+ { 0x2f76, 0x2f56, 0x2f16, 0x2f00, 0x40 }, /* V */
+ { 0x3062, 0x3042, 0x3002, 0x3000, 0x40 }, /* B */
+ { 0x316e, 0x314e, 0x310e, 0x3100, 0x40 }, /* N */
+ { 0x326d, 0x324d, 0x320d, 0x3200, 0x40 }, /* M */
+ { 0x332c, 0x333c, none, none, none }, /* ,< */
+ { 0x342e, 0x343e, none, none, none }, /* .> */
+ { 0x352f, 0x353f, none, none, none }, /* /? */
+ { none, none, none, none, none }, /* R Shift */
+ { 0x372a, 0x372a, none, none, none }, /* * */
+ { none, none, none, none, none }, /* L Alt */
+ { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */
+ { none, none, none, none, none }, /* caps lock */
+ { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */
+ { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */
+ { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */
+ { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */
+ { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */
+ { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */
+ { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */
+ { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */
+ { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */
+ { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */
+ { none, none, none, none, none }, /* Num Lock */
+ { none, none, none, none, none }, /* Scroll Lock */
+ { 0x4700, 0x4737, 0x7700, none, 0x20 }, /* 7 Home */
+ { 0x4800, 0x4838, none, none, 0x20 }, /* 8 UP */
+ { 0x4900, 0x4939, 0x8400, none, 0x20 }, /* 9 PgUp */
+ { 0x4a2d, 0x4a2d, none, none, none }, /* - */
+ { 0x4b00, 0x4b34, 0x7300, none, 0x20 }, /* 4 Left */
+ { 0x4c00, 0x4c35, none, none, 0x20 }, /* 5 */
+ { 0x4d00, 0x4d36, 0x7400, none, 0x20 }, /* 6 Right */
+ { 0x4e2b, 0x4e2b, none, none, none }, /* + */
+ { 0x4f00, 0x4f31, 0x7500, none, 0x20 }, /* 1 End */
+ { 0x5000, 0x5032, none, none, 0x20 }, /* 2 Down */
+ { 0x5100, 0x5133, 0x7600, none, 0x20 }, /* 3 PgDn */
+ { 0x5200, 0x5230, none, none, 0x20 }, /* 0 Ins */
+ { 0x5300, 0x532e, none, none, 0x20 }, /* Del */
+ { none, none, none, none, none },
+ { none, none, none, none, none },
+ { none, none, none, none, none },
+ { 0x5700, 0x5700, none, none, none }, /* F11 */
+ { 0x5800, 0x5800, none, none, none } /* F12 */
+ };
+
+ Bit8u
+inb(port)
+ Bit16u port;
+{
+ASM_START
+ push bp
+ mov bp, sp
+
+ push dx
+ mov dx, 4[bp]
+ in al, dx
+ pop dx
+
+ pop bp
+ASM_END
+}
+
+#if BX_USE_ATADRV
+ Bit16u
+inw(port)
+ Bit16u port;
+{
+ASM_START
+ push bp
+ mov bp, sp
+
+ push dx
+ mov dx, 4[bp]
+ in ax, dx
+ pop dx
+
+ pop bp
+ASM_END
+}
+#endif
+
+ void
+outb(port, val)
+ Bit16u port;
+ Bit8u val;
+{
+ASM_START
+ push bp
+ mov bp, sp
+
+ push ax
+ push dx
+ mov dx, 4[bp]
+ mov al, 6[bp]
+ out dx, al
+ pop dx
+ pop ax
+
+ pop bp
+ASM_END
+}
+
+#if BX_USE_ATADRV
+ void
+outw(port, val)
+ Bit16u port;
+ Bit16u val;
+{
+ASM_START
+ push bp
+ mov bp, sp
+
+ push ax
+ push dx
+ mov dx, 4[bp]
+ mov ax, 6[bp]
+ out dx, ax
+ pop dx
+ pop ax
+
+ pop bp
+ASM_END
+}
+#endif
+
+ void
+outb_cmos(cmos_reg, val)
+ Bit8u cmos_reg;
+ Bit8u val;
+{
+ASM_START
+ push bp
+ mov bp, sp
+
+ mov al, 4[bp] ;; cmos_reg
+ out 0x70, al
+ mov al, 6[bp] ;; val
+ out 0x71, al
+
+ pop bp
+ASM_END
+}
+
+ Bit8u
+inb_cmos(cmos_reg)
+ Bit8u cmos_reg;
+{
+ASM_START
+ push bp
+ mov bp, sp
+
+ mov al, 4[bp] ;; cmos_reg
+ out 0x70, al
+ in al, 0x71
+
+ pop bp
+ASM_END
+}
+
+ void
+init_rtc()
+{
+ outb_cmos(0x0a, 0x26);
+ outb_cmos(0x0b, 0x02);
+ inb_cmos(0x0c);
+ inb_cmos(0x0d);
+}
+
+ bx_bool
+rtc_updating()
+{
+ // This function checks to see if the update-in-progress bit
+ // is set in CMOS Status Register A. If not, it returns 0.
+ // If it is set, it tries to wait until there is a transition
+ // to 0, and will return 0 if such a transition occurs. A 1
+ // is returned only after timing out. The maximum period
+ // that this bit should be set is constrained to 244useconds.
+ // The count I use below guarantees coverage or more than
+ // this time, with any reasonable IPS setting.
+
+ Bit16u count;
+
+ count = 25000;
+ while (--count != 0) {
+ if ( (inb_cmos(0x0a) & 0x80) == 0 )
+ return(0);
+ }
+ return(1); // update-in-progress never transitioned to 0
+}
+
+
+ Bit8u
+read_byte(seg, offset)
+ Bit16u seg;
+ Bit16u offset;
+{
+ASM_START
+ push bp
+ mov bp, sp
+
+ push bx
+ push ds
+ mov ax, 4[bp] ; segment
+ mov ds, ax
+ mov bx, 6[bp] ; offset
+ mov al, [bx]
+ ;; al = return value (byte)
+ pop ds
+ pop bx
+
+ pop bp
+ASM_END
+}
+
+ Bit16u
+read_word(seg, offset)
+ Bit16u seg;
+ Bit16u offset;
+{
+ASM_START
+ push bp
+ mov bp, sp
+
+ push bx
+ push ds
+ mov ax, 4[bp] ; segment
+ mov ds, ax
+ mov bx, 6[bp] ; offset
+ mov ax, [bx]
+ ;; ax = return value (word)
+ pop ds
+ pop bx
+
+ pop bp
+ASM_END
+}
+
+ void
+write_byte(seg, offset, data)
+ Bit16u seg;
+ Bit16u offset;
+ Bit8u data;
+{
+ASM_START
+ push bp
+ mov bp, sp
+
+ push ax
+ push bx
+ push ds
+ mov ax, 4[bp] ; segment
+ mov ds, ax
+ mov bx, 6[bp] ; offset
+ mov al, 8[bp] ; data byte
+ mov [bx], al ; write data byte
+ pop ds
+ pop bx
+ pop ax
+
+ pop bp
+ASM_END
+}
+
+ void
+write_word(seg, offset, data)
+ Bit16u seg;
+ Bit16u offset;
+ Bit16u data;
+{
+ASM_START
+ push bp
+ mov bp, sp
+
+ push ax
+ push bx
+ push ds
+ mov ax, 4[bp] ; segment
+ mov ds, ax
+ mov bx, 6[bp] ; offset
+ mov ax, 8[bp] ; data word
+ mov [bx], ax ; write data word
+ pop ds
+ pop bx
+ pop ax
+
+ pop bp
+ASM_END
+}
+
+ Bit16u
+get_CS()
+{
+ASM_START
+ mov ax, cs
+ASM_END
+}
+
+ Bit16u
+get_SS()
+{
+ASM_START
+ mov ax, ss
+ASM_END
+}
+
+#if BX_DEBUG_SERIAL
+/* serial debug port*/
+#define BX_DEBUG_PORT 0x03f8
+
+/* data */
+#define UART_RBR 0x00
+#define UART_THR 0x00
+
+/* control */
+#define UART_IER 0x01
+#define UART_IIR 0x02
+#define UART_FCR 0x02
+#define UART_LCR 0x03
+#define UART_MCR 0x04
+#define UART_DLL 0x00
+#define UART_DLM 0x01
+
+/* status */
+#define UART_LSR 0x05
+#define UART_MSR 0x06
+#define UART_SCR 0x07
+
+int uart_can_tx_byte(base_port)
+ Bit16u base_port;
+{
+ return inb(base_port + UART_LSR) & 0x20;
+}
+
+void uart_wait_to_tx_byte(base_port)
+ Bit16u base_port;
+{
+ while (!uart_can_tx_byte(base_port));
+}
+
+void uart_wait_until_sent(base_port)
+ Bit16u base_port;
+{
+ while (!(inb(base_port + UART_LSR) & 0x40));
+}
+
+void uart_tx_byte(base_port, data)
+ Bit16u base_port;
+ Bit8u data;
+{
+ uart_wait_to_tx_byte(base_port);
+ outb(base_port + UART_THR, data);
+ uart_wait_until_sent(base_port);
+}
+#endif
+
+ void
+wrch(c)
+ Bit8u c;
+{
+ ASM_START
+ push bp
+ mov bp, sp
+
+ push bx
+ mov ah, #0x0e
+ mov al, 4[bp]
+ xor bx,bx
+ int #0x10
+ pop bx
+
+ pop bp
+ ASM_END
+}
+
+ void
+send(action, c)
+ Bit16u action;
+ Bit8u c;
+{
+#if BX_DEBUG_SERIAL
+ if (c == '\n') uart_tx_byte(BX_DEBUG_PORT, '\r');
+ uart_tx_byte(BX_DEBUG_PORT, c);
+#endif
+#if BX_VIRTUAL_PORTS
+ if (action & BIOS_PRINTF_DEBUG) outb(DEBUG_PORT, c);
+ if (action & BIOS_PRINTF_INFO) outb(INFO_PORT, c);
+#endif
+ if (action & BIOS_PRINTF_SCREEN) {
+ if (c == '\n') wrch('\r');
+ wrch(c);
+ }
+}
+
+ void
+put_int(action, val, width, neg)
+ Bit16u action;
+ short val, width;
+ bx_bool neg;
+{
+ short nval = val / 10;
+ if (nval)
+ put_int(action, nval, width - 1, neg);
+ else {
+ while (--width > 0) send(action, ' ');
+ if (neg) send(action, '-');
+ }
+ send(action, val - (nval * 10) + '0');
+}
+
+ void
+put_uint(action, val, width, neg)
+ Bit16u action;
+ unsigned short val;
+ short width;
+ bx_bool neg;
+{
+ unsigned short nval = val / 10;
+ if (nval)
+ put_uint(action, nval, width - 1, neg);
+ else {
+ while (--width > 0) send(action, ' ');
+ if (neg) send(action, '-');
+ }
+ send(action, val - (nval * 10) + '0');
+}
+
+ void
+put_luint(action, val, width, neg)
+ Bit16u action;
+ unsigned long val;
+ short width;
+ bx_bool neg;
+{
+ unsigned long nval = val / 10;
+ if (nval)
+ put_luint(action, nval, width - 1, neg);
+ else {
+ while (--width > 0) send(action, ' ');
+ if (neg) send(action, '-');
+ }
+ send(action, val - (nval * 10) + '0');
+}
+
+//--------------------------------------------------------------------------
+// bios_printf()
+// A compact variable argument printf function which prints its output via
+// an I/O port so that it can be logged by Bochs/Plex.
+// Currently, only %x is supported (or %02x, %04x, etc).
+//
+// Supports %[format_width][format]
+// where format can be d,x,c,s
+//--------------------------------------------------------------------------
+ void
+bios_printf(action, s)
+ Bit16u action;
+ Bit8u *s;
+{
+ Bit8u c, format_char;
+ bx_bool in_format;
+ short i;
+ Bit16u *arg_ptr;
+ Bit16u arg_seg, arg, nibble, hibyte, shift_count, format_width;
+
+ arg_ptr = &s;
+ arg_seg = get_SS();
+
+ in_format = 0;
+ format_width = 0;
+
+ if ((action & BIOS_PRINTF_DEBHALT) == BIOS_PRINTF_DEBHALT) {
+#if BX_VIRTUAL_PORTS
+ outb(PANIC_PORT2, 0x00);
+#endif
+ bios_printf (BIOS_PRINTF_SCREEN, "FATAL: ");
+ }
+
+ while (c = read_byte(get_CS(), s)) {
+ if ( c == '%' ) {
+ in_format = 1;
+ format_width = 0;
+ }
+ else if (in_format) {
+ if ( (c>='0') && (c<='9') ) {
+ format_width = (format_width * 10) + (c - '0');
+ }
+ else {
+ arg_ptr++; // increment to next arg
+ arg = read_word(arg_seg, arg_ptr);
+ if (c == 'x') {
+ if (format_width == 0)
+ format_width = 4;
+ for (i=format_width-1; i>=0; i--) {
+ nibble = (arg >> (4 * i)) & 0x000f;
+ send (action, (nibble<=9)? (nibble+'0') : (nibble-10+'A'));
+ }
+ }
+ else if (c == 'u') {
+ put_uint(action, arg, format_width, 0);
+ }
+ else if (c == 'l') {
+ s++;
+ arg_ptr++; /* increment to next arg */
+ hibyte = read_word(arg_seg, arg_ptr);
+ put_luint(action, ((Bit32u) hibyte << 16) | arg, format_width, 0);
+ }
+ else if (c == 'd') {
+ if (arg & 0x8000)
+ put_int(action, -arg, format_width - 1, 1);
+ else
+ put_int(action, arg, format_width, 0);
+ }
+ else if (c == 's') {
+ bios_printf(action & (~BIOS_PRINTF_HALT), arg);
+ }
+ else if (c == 'c') {
+ send(action, arg);
+ }
+ else
+ BX_PANIC("bios_printf: unknown format\n");
+ in_format = 0;
+ }
+ }
+ else {
+ send(action, c);
+ }
+ s ++;
+ }
+
+ if (action & BIOS_PRINTF_HALT) {
+ // freeze in a busy loop.
+ASM_START
+ cli
+ halt2_loop:
+ hlt
+ jmp halt2_loop
+ASM_END
+ }
+}
+
+//--------------------------------------------------------------------------
+// keyboard_init
+//--------------------------------------------------------------------------
+// this file is based on LinuxBIOS implementation of keyboard.c
+// could convert to #asm to gain space
+ void
+keyboard_init()
+{
+#ifndef LINUXBIOS
+ Bit16u max;
+
+ /* ------------------- Flush buffers ------------------------*/
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ( (inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x00);
+
+ /* flush incoming keys */
+ max=0x2000;
+ while (--max > 0) {
+ outb(0x80, 0x00);
+ if (inb(0x64) & 0x01) {
+ inb(0x60);
+ max = 0x2000;
+ }
+ }
+
+ // Due to timer issues, and if the IPS setting is > 15000000,
+ // the incoming keys might not be flushed here. That will
+ // cause a panic a few lines below. See sourceforge bug report :
+ // [ 642031 ] FATAL: Keyboard RESET error:993
+
+ /* ------------------- controller side ----------------------*/
+ /* send cmd = 0xAA, self test 8042 */
+ outb(0x64, 0xaa);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ( (inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x00);
+ if (max==0x0) keyboard_panic(00);
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x01);
+ if (max==0x0) keyboard_panic(01);
+
+ /* read self-test result, 0x55 should be returned from 0x60 */
+ if ((inb(0x60) != 0x55)){
+ keyboard_panic(991);
+ }
+
+ /* send cmd = 0xAB, keyboard interface test */
+ outb(0x64,0xab);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x10);
+ if (max==0x0) keyboard_panic(10);
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x11);
+ if (max==0x0) keyboard_panic(11);
+
+ /* read keyboard interface test result, */
+ /* 0x00 should be returned form 0x60 */
+ if ((inb(0x60) != 0x00)) {
+ keyboard_panic(992);
+ }
+
+ /* Enable Keyboard clock */
+ outb(0x64,0xae);
+ outb(0x64,0xa8);
+
+ /* ------------------- keyboard side ------------------------*/
+ /* reset kerboard and self test (keyboard side) */
+ outb(0x60, 0xff);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x20);
+ if (max==0x0) keyboard_panic(20);
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x21);
+ if (max==0x0) keyboard_panic(21);
+
+ /* keyboard should return ACK */
+ if ((inb(0x60) != 0xfa)) {
+ keyboard_panic(993);
+ }
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x31);
+ if (max==0x0) keyboard_panic(31);
+
+ if ((inb(0x60) != 0xaa)) {
+ keyboard_panic(994);
+ }
+
+ /* Disable keyboard */
+ outb(0x60, 0xf5);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x40);
+ if (max==0x0) keyboard_panic(40);
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x41);
+ if (max==0x0) keyboard_panic(41);
+
+ /* keyboard should return ACK */
+ if ((inb(0x60) != 0xfa)) {
+ keyboard_panic(995);
+ }
+
+ /* Write Keyboard Mode */
+ outb(0x64, 0x60);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x50);
+ if (max==0x0) keyboard_panic(50);
+
+ /* send cmd: scan code convert, disable mouse, enable IRQ 1 */
+ outb(0x60, 0x61);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x60);
+ if (max==0x0) keyboard_panic(60);
+
+ /* Enable keyboard */
+ outb(0x60, 0xf4);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x70);
+ if (max==0x0) keyboard_panic(70);
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x71);
+ if (max==0x0) keyboard_panic(70);
+
+ /* keyboard should return ACK */
+ if ((inb(0x60) != 0xfa)) {
+ keyboard_panic(996);
+ }
+
+ outb(0x80, 0x77);
+#endif
+}
+
+//--------------------------------------------------------------------------
+// keyboard_panic
+//--------------------------------------------------------------------------
+ void
+keyboard_panic(status)
+ Bit16u status;
+{
+ // If you're getting a 993 keyboard panic here,
+ // please see the comment in keyboard_init
+
+ BX_PANIC("Keyboard error:%u\n",status);
+}
+
+//--------------------------------------------------------------------------
+// shutdown_status_panic
+// called when the shutdown statsu is not implemented, displays the status
+//--------------------------------------------------------------------------
+ void
+shutdown_status_panic(status)
+ Bit16u status;
+{
+ BX_PANIC("Unimplemented shutdown status: %02x\n",(Bit8u)status);
+}
+
+//--------------------------------------------------------------------------
+// print_bios_banner
+// displays a the bios version
+//--------------------------------------------------------------------------
+void
+print_bios_banner()
+{
+ printf(BX_APPNAME" BIOS - build: %s\n%s\nOptions: ",
+ BIOS_BUILD_DATE, bios_cvs_version_string);
+ printf(
+#ifdef BX_PCIBIOS
+ "pcibios "
+#endif
+#ifdef BX_ELTORITO_BOOT
+ "eltorito "
+#endif
+ "\n\n");
+}
+
+//--------------------------------------------------------------------------
+// print_boot_device
+// displays the boot device
+//--------------------------------------------------------------------------
+
+static char drivetypes[][10]={"Floppy","Hard Disk","CD-Rom"};
+
+void
+print_boot_device(cdboot, drive)
+ Bit8u cdboot; Bit16u drive;
+{
+ Bit8u i;
+
+ // cdboot contains 0 if floppy/harddisk, 1 otherwise
+ // drive contains real/emulated boot drive
+
+ if(cdboot)i=2; // CD-Rom
+ else if((drive&0x0080)==0x00)i=0; // Floppy
+ else if((drive&0x0080)==0x80)i=1; // Hard drive
+ else return;
+
+ printf("Booting from %s...\n",drivetypes[i]);
+}
+
+//--------------------------------------------------------------------------
+// print_boot_failure
+// displays the reason why boot failed
+//--------------------------------------------------------------------------
+ void
+print_boot_failure(cdboot, drive, reason, lastdrive)
+ Bit8u cdboot; Bit8u drive; Bit8u lastdrive;
+{
+ Bit16u drivenum = drive&0x7f;
+
+ // cdboot: 1 if boot from cd, 0 otherwise
+ // drive : drive number
+ // reason: 0 signature check failed, 1 read error
+ // lastdrive: 1 boot drive is the last one in boot sequence
+
+ if (cdboot)
+ bios_printf(BIOS_PRINTF_INFO | BIOS_PRINTF_SCREEN, "Boot from %s failed\n",drivetypes[2]);
+ else if (drive & 0x80)
+ bios_printf(BIOS_PRINTF_INFO | BIOS_PRINTF_SCREEN, "Boot from %s %d failed\n", drivetypes[1],drivenum);
+ else
+ bios_printf(BIOS_PRINTF_INFO | BIOS_PRINTF_SCREEN, "Boot from %s %d failed\n", drivetypes[0],drivenum);
+
+ if (lastdrive==1) {
+ if (reason==0)
+ BX_PANIC("Not a bootable disk\n");
+ else
+ BX_PANIC("Could not read the boot disk\n");
+ }
+}
+
+//--------------------------------------------------------------------------
+// print_cdromboot_failure
+// displays the reason why boot failed
+//--------------------------------------------------------------------------
+ void
+print_cdromboot_failure( code )
+ Bit16u code;
+{
+ bios_printf(BIOS_PRINTF_SCREEN | BIOS_PRINTF_INFO, "CDROM boot failure code : %04x\n",code);
+
+ return;
+}
+
+void
+nmi_handler_msg()
+{
+ BX_PANIC("NMI Handler called\n");
+}
+
+void
+int18_panic_msg()
+{
+ BX_PANIC("INT18: BOOT FAILURE\n");
+}
+
+void
+log_bios_start()
+{
+#if BX_DEBUG_SERIAL
+ outb(BX_DEBUG_PORT+UART_LCR, 0x03); /* setup for serial logging: 8N1 */
+#endif
+ BX_INFO("%s\n", bios_cvs_version_string);
+}
+
+ bx_bool
+set_enable_a20(val)
+ bx_bool val;
+{
+ Bit8u oldval;
+
+ // Use PS2 System Control port A to set A20 enable
+
+ // get current setting first
+ oldval = inb(0x92);
+
+ // change A20 status
+ if (val)
+ outb(0x92, oldval | 0x02);
+ else
+ outb(0x92, oldval & 0xfd);
+
+ return((oldval & 0x02) != 0);
+}
+
+ void
+debugger_on()
+{
+ outb(0xfedc, 0x01);
+}
+
+ void
+debugger_off()
+{
+ outb(0xfedc, 0x00);
+}
+
+#if BX_USE_ATADRV
+
+// ---------------------------------------------------------------------------
+// Start of ATA/ATAPI Driver
+// ---------------------------------------------------------------------------
+
+// Global defines -- ATA register and register bits.
+// command block & control block regs
+#define ATA_CB_DATA 0 // data reg in/out pio_base_addr1+0
+#define ATA_CB_ERR 1 // error in pio_base_addr1+1
+#define ATA_CB_FR 1 // feature reg out pio_base_addr1+1
+#define ATA_CB_SC 2 // sector count in/out pio_base_addr1+2
+#define ATA_CB_SN 3 // sector number in/out pio_base_addr1+3
+#define ATA_CB_CL 4 // cylinder low in/out pio_base_addr1+4
+#define ATA_CB_CH 5 // cylinder high in/out pio_base_addr1+5
+#define ATA_CB_DH 6 // device head in/out pio_base_addr1+6
+#define ATA_CB_STAT 7 // primary status in pio_base_addr1+7
+#define ATA_CB_CMD 7 // command out pio_base_addr1+7
+#define ATA_CB_ASTAT 6 // alternate status in pio_base_addr2+6
+#define ATA_CB_DC 6 // device control out pio_base_addr2+6
+#define ATA_CB_DA 7 // device address in pio_base_addr2+7
+
+#define ATA_CB_ER_ICRC 0x80 // ATA Ultra DMA bad CRC
+#define ATA_CB_ER_BBK 0x80 // ATA bad block
+#define ATA_CB_ER_UNC 0x40 // ATA uncorrected error
+#define ATA_CB_ER_MC 0x20 // ATA media change
+#define ATA_CB_ER_IDNF 0x10 // ATA id not found
+#define ATA_CB_ER_MCR 0x08 // ATA media change request
+#define ATA_CB_ER_ABRT 0x04 // ATA command aborted
+#define ATA_CB_ER_NTK0 0x02 // ATA track 0 not found
+#define ATA_CB_ER_NDAM 0x01 // ATA address mark not found
+
+#define ATA_CB_ER_P_SNSKEY 0xf0 // ATAPI sense key (mask)
+#define ATA_CB_ER_P_MCR 0x08 // ATAPI Media Change Request
+#define ATA_CB_ER_P_ABRT 0x04 // ATAPI command abort
+#define ATA_CB_ER_P_EOM 0x02 // ATAPI End of Media
+#define ATA_CB_ER_P_ILI 0x01 // ATAPI Illegal Length Indication
+
+// ATAPI Interrupt Reason bits in the Sector Count reg (CB_SC)
+#define ATA_CB_SC_P_TAG 0xf8 // ATAPI tag (mask)
+#define ATA_CB_SC_P_REL 0x04 // ATAPI release
+#define ATA_CB_SC_P_IO 0x02 // ATAPI I/O
+#define ATA_CB_SC_P_CD 0x01 // ATAPI C/D
+
+// bits 7-4 of the device/head (CB_DH) reg
+#define ATA_CB_DH_DEV0 0xa0 // select device 0
+#define ATA_CB_DH_DEV1 0xb0 // select device 1
+
+// status reg (CB_STAT and CB_ASTAT) bits
+#define ATA_CB_STAT_BSY 0x80 // busy
+#define ATA_CB_STAT_RDY 0x40 // ready
+#define ATA_CB_STAT_DF 0x20 // device fault
+#define ATA_CB_STAT_WFT 0x20 // write fault (old name)
+#define ATA_CB_STAT_SKC 0x10 // seek complete
+#define ATA_CB_STAT_SERV 0x10 // service
+#define ATA_CB_STAT_DRQ 0x08 // data request
+#define ATA_CB_STAT_CORR 0x04 // corrected
+#define ATA_CB_STAT_IDX 0x02 // index
+#define ATA_CB_STAT_ERR 0x01 // error (ATA)
+#define ATA_CB_STAT_CHK 0x01 // check (ATAPI)
+
+// device control reg (CB_DC) bits
+#define ATA_CB_DC_HD15 0x08 // bit should always be set to one
+#define ATA_CB_DC_SRST 0x04 // soft reset
+#define ATA_CB_DC_NIEN 0x02 // disable interrupts
+
+// Most mandtory and optional ATA commands (from ATA-3),
+#define ATA_CMD_CFA_ERASE_SECTORS 0xC0
+#define ATA_CMD_CFA_REQUEST_EXT_ERR_CODE 0x03
+#define ATA_CMD_CFA_TRANSLATE_SECTOR 0x87
+#define ATA_CMD_CFA_WRITE_MULTIPLE_WO_ERASE 0xCD
+#define ATA_CMD_CFA_WRITE_SECTORS_WO_ERASE 0x38
+#define ATA_CMD_CHECK_POWER_MODE1 0xE5
+#define ATA_CMD_CHECK_POWER_MODE2 0x98
+#define ATA_CMD_DEVICE_RESET 0x08
+#define ATA_CMD_EXECUTE_DEVICE_DIAGNOSTIC 0x90
+#define ATA_CMD_FLUSH_CACHE 0xE7
+#define ATA_CMD_FORMAT_TRACK 0x50
+#define ATA_CMD_IDENTIFY_DEVICE 0xEC
+#define ATA_CMD_IDENTIFY_DEVICE_PACKET 0xA1
+#define ATA_CMD_IDENTIFY_PACKET_DEVICE 0xA1
+#define ATA_CMD_IDLE1 0xE3
+#define ATA_CMD_IDLE2 0x97
+#define ATA_CMD_IDLE_IMMEDIATE1 0xE1
+#define ATA_CMD_IDLE_IMMEDIATE2 0x95
+#define ATA_CMD_INITIALIZE_DRIVE_PARAMETERS 0x91
+#define ATA_CMD_INITIALIZE_DEVICE_PARAMETERS 0x91
+#define ATA_CMD_NOP 0x00
+#define ATA_CMD_PACKET 0xA0
+#define ATA_CMD_READ_BUFFER 0xE4
+#define ATA_CMD_READ_DMA 0xC8
+#define ATA_CMD_READ_DMA_QUEUED 0xC7
+#define ATA_CMD_READ_MULTIPLE 0xC4
+#define ATA_CMD_READ_SECTORS 0x20
+#define ATA_CMD_READ_VERIFY_SECTORS 0x40
+#define ATA_CMD_RECALIBRATE 0x10
+#define ATA_CMD_SEEK 0x70
+#define ATA_CMD_SET_FEATURES 0xEF
+#define ATA_CMD_SET_MULTIPLE_MODE 0xC6
+#define ATA_CMD_SLEEP1 0xE6
+#define ATA_CMD_SLEEP2 0x99
+#define ATA_CMD_STANDBY1 0xE2
+#define ATA_CMD_STANDBY2 0x96
+#define ATA_CMD_STANDBY_IMMEDIATE1 0xE0
+#define ATA_CMD_STANDBY_IMMEDIATE2 0x94
+#define ATA_CMD_WRITE_BUFFER 0xE8
+#define ATA_CMD_WRITE_DMA 0xCA
+#define ATA_CMD_WRITE_DMA_QUEUED 0xCC
+#define ATA_CMD_WRITE_MULTIPLE 0xC5
+#define ATA_CMD_WRITE_SECTORS 0x30
+#define ATA_CMD_WRITE_VERIFY 0x3C
+
+#define ATA_IFACE_NONE 0x00
+#define ATA_IFACE_ISA 0x00
+#define ATA_IFACE_PCI 0x01
+
+#define ATA_TYPE_NONE 0x00
+#define ATA_TYPE_UNKNOWN 0x01
+#define ATA_TYPE_ATA 0x02
+#define ATA_TYPE_ATAPI 0x03
+
+#define ATA_DEVICE_NONE 0x00
+#define ATA_DEVICE_HD 0xFF
+#define ATA_DEVICE_CDROM 0x05
+
+#define ATA_MODE_NONE 0x00
+#define ATA_MODE_PIO16 0x00
+#define ATA_MODE_PIO32 0x01
+#define ATA_MODE_ISADMA 0x02
+#define ATA_MODE_PCIDMA 0x03
+#define ATA_MODE_USEIRQ 0x10
+
+#define ATA_TRANSLATION_NONE 0
+#define ATA_TRANSLATION_LBA 1
+#define ATA_TRANSLATION_LARGE 2
+#define ATA_TRANSLATION_RECHS 3
+
+#define ATA_DATA_NO 0x00
+#define ATA_DATA_IN 0x01
+#define ATA_DATA_OUT 0x02
+
+// ---------------------------------------------------------------------------
+// ATA/ATAPI driver : initialization
+// ---------------------------------------------------------------------------
+void ata_init( )
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit8u channel, device;
+
+ // Channels info init.
+ for (channel=0; channel<BX_MAX_ATA_INTERFACES; channel++) {
+ write_byte(ebda_seg,&EbdaData->ata.channels[channel].iface,ATA_IFACE_NONE);
+ write_word(ebda_seg,&EbdaData->ata.channels[channel].iobase1,0x0);
+ write_word(ebda_seg,&EbdaData->ata.channels[channel].iobase2,0x0);
+ write_byte(ebda_seg,&EbdaData->ata.channels[channel].irq,0);
+ }
+
+ // Devices info init.
+ for (device=0; device<BX_MAX_ATA_DEVICES; device++) {
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].type,ATA_TYPE_NONE);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].device,ATA_DEVICE_NONE);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].removable,0);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].lock,0);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].mode,ATA_MODE_NONE);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].blksize,0);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].translation,ATA_TRANSLATION_NONE);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].lchs.heads,0);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].lchs.cylinders,0);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].lchs.spt,0);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].pchs.heads,0);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].pchs.cylinders,0);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].pchs.spt,0);
+
+ write_dword(ebda_seg,&EbdaData->ata.devices[device].sectors,0L);
+ }
+
+ // hdidmap and cdidmap init.
+ for (device=0; device<BX_MAX_ATA_DEVICES; device++) {
+ write_byte(ebda_seg,&EbdaData->ata.hdidmap[device],BX_MAX_ATA_DEVICES);
+ write_byte(ebda_seg,&EbdaData->ata.cdidmap[device],BX_MAX_ATA_DEVICES);
+ }
+
+ write_byte(ebda_seg,&EbdaData->ata.hdcount,0);
+ write_byte(ebda_seg,&EbdaData->ata.cdcount,0);
+}
+
+// ---------------------------------------------------------------------------
+// ATA/ATAPI driver : device detection
+// ---------------------------------------------------------------------------
+
+void ata_detect( )
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit8u hdcount, cdcount, device, type;
+ Bit8u buffer[0x0200];
+ Bit16u i;
+
+#if BX_MAX_ATA_INTERFACES > 0
+ write_byte(ebda_seg,&EbdaData->ata.channels[0].iface,ATA_IFACE_ISA);
+ write_word(ebda_seg,&EbdaData->ata.channels[0].iobase1,0x1f0);
+ write_word(ebda_seg,&EbdaData->ata.channels[0].iobase2,0x3f0);
+ write_byte(ebda_seg,&EbdaData->ata.channels[0].irq,14);
+#endif
+#if BX_MAX_ATA_INTERFACES > 1
+ write_byte(ebda_seg,&EbdaData->ata.channels[1].iface,ATA_IFACE_ISA);
+ write_word(ebda_seg,&EbdaData->ata.channels[1].iobase1,0x170);
+ write_word(ebda_seg,&EbdaData->ata.channels[1].iobase2,0x370);
+ write_byte(ebda_seg,&EbdaData->ata.channels[1].irq,15);
+#endif
+#if BX_MAX_ATA_INTERFACES > 2
+ write_byte(ebda_seg,&EbdaData->ata.channels[2].iface,ATA_IFACE_ISA);
+ write_word(ebda_seg,&EbdaData->ata.channels[2].iobase1,0x1e8);
+ write_word(ebda_seg,&EbdaData->ata.channels[2].iobase2,0x3e0);
+ write_byte(ebda_seg,&EbdaData->ata.channels[2].irq,12);
+#endif
+#if BX_MAX_ATA_INTERFACES > 3
+ write_byte(ebda_seg,&EbdaData->ata.channels[3].iface,ATA_IFACE_ISA);
+ write_word(ebda_seg,&EbdaData->ata.channels[3].iobase1,0x168);
+ write_word(ebda_seg,&EbdaData->ata.channels[3].iobase2,0x360);
+ write_byte(ebda_seg,&EbdaData->ata.channels[3].irq,11);
+#endif
+#if BX_MAX_ATA_INTERFACES > 4
+#error Please fill the ATA interface informations
+#endif
+
+ // Device detection
+ hdcount=cdcount=0;
+
+ for(device=0; device<BX_MAX_ATA_DEVICES; device++) {
+ Bit16u iobase1, iobase2;
+ Bit8u channel, slave, shift;
+ Bit8u sc, sn, cl, ch, st;
+
+ channel = device / 2;
+ slave = device % 2;
+
+ iobase1 =read_word(ebda_seg,&EbdaData->ata.channels[channel].iobase1);
+ iobase2 =read_word(ebda_seg,&EbdaData->ata.channels[channel].iobase2);
+
+ // Disable interrupts
+ outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
+
+ // Look for device
+ outb(iobase1+ATA_CB_DH, slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0);
+ outb(iobase1+ATA_CB_SC, 0x55);
+ outb(iobase1+ATA_CB_SN, 0xaa);
+ outb(iobase1+ATA_CB_SC, 0xaa);
+ outb(iobase1+ATA_CB_SN, 0x55);
+ outb(iobase1+ATA_CB_SC, 0x55);
+ outb(iobase1+ATA_CB_SN, 0xaa);
+
+ // If we found something
+ sc = inb(iobase1+ATA_CB_SC);
+ sn = inb(iobase1+ATA_CB_SN);
+
+ if ( (sc == 0x55) && (sn == 0xaa) ) {
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].type,ATA_TYPE_UNKNOWN);
+
+ // reset the channel
+ ata_reset(device);
+
+ // check for ATA or ATAPI
+ outb(iobase1+ATA_CB_DH, slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0);
+ sc = inb(iobase1+ATA_CB_SC);
+ sn = inb(iobase1+ATA_CB_SN);
+ if ((sc==0x01) && (sn==0x01)) {
+ cl = inb(iobase1+ATA_CB_CL);
+ ch = inb(iobase1+ATA_CB_CH);
+ st = inb(iobase1+ATA_CB_STAT);
+
+ if ((cl==0x14) && (ch==0xeb)) {
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].type,ATA_TYPE_ATAPI);
+ } else if ((cl==0x00) && (ch==0x00) && (st!=0x00)) {
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].type,ATA_TYPE_ATA);
+ } else if ((cl==0xff) && (ch==0xff)) {
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].type,ATA_TYPE_NONE);
+ }
+ }
+ }
+
+ type=read_byte(ebda_seg,&EbdaData->ata.devices[device].type);
+
+ // Now we send a IDENTIFY command to ATA device
+ if(type == ATA_TYPE_ATA) {
+ Bit32u sectors;
+ Bit16u cylinders, heads, spt, blksize;
+ Bit8u translation, removable, mode;
+
+ //Temporary values to do the transfer
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].device,ATA_DEVICE_HD);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].mode, ATA_MODE_PIO16);
+
+ if (ata_cmd_data_in(device,ATA_CMD_IDENTIFY_DEVICE, 1, 0, 0, 0, 0L, get_SS(),buffer) !=0 )
+ BX_PANIC("ata-detect: Failed to detect ATA device\n");
+
+ removable = (read_byte(get_SS(),buffer+0) & 0x80) ? 1 : 0;
+ mode = read_byte(get_SS(),buffer+96) ? ATA_MODE_PIO32 : ATA_MODE_PIO16;
+ blksize = read_word(get_SS(),buffer+10);
+
+ cylinders = read_word(get_SS(),buffer+(1*2)); // word 1
+ heads = read_word(get_SS(),buffer+(3*2)); // word 3
+ spt = read_word(get_SS(),buffer+(6*2)); // word 6
+
+ sectors = read_dword(get_SS(),buffer+(60*2)); // word 60 and word 61
+
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].device,ATA_DEVICE_HD);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].removable, removable);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].mode, mode);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].blksize, blksize);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].pchs.heads, heads);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].pchs.cylinders, cylinders);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].pchs.spt, spt);
+ write_dword(ebda_seg,&EbdaData->ata.devices[device].sectors, sectors);
+ BX_INFO("ata%d-%d: PCHS=%u/%d/%d translation=", channel, slave,cylinders, heads, spt);
+
+ translation = inb_cmos(0x39 + channel/2);
+ for (shift=device%4; shift>0; shift--) translation >>= 2;
+ translation &= 0x03;
+
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].translation, translation);
+
+ switch (translation) {
+ case ATA_TRANSLATION_NONE:
+ BX_INFO("none");
+ break;
+ case ATA_TRANSLATION_LBA:
+ BX_INFO("lba");
+ break;
+ case ATA_TRANSLATION_LARGE:
+ BX_INFO("large");
+ break;
+ case ATA_TRANSLATION_RECHS:
+ BX_INFO("r-echs");
+ break;
+ }
+ switch (translation) {
+ case ATA_TRANSLATION_NONE:
+ break;
+ case ATA_TRANSLATION_LBA:
+ spt = 63;
+ sectors /= 63;
+ heads = sectors / 1024;
+ if (heads>128) heads = 255;
+ else if (heads>64) heads = 128;
+ else if (heads>32) heads = 64;
+ else if (heads>16) heads = 32;
+ else heads=16;
+ cylinders = sectors / heads;
+ break;
+ case ATA_TRANSLATION_RECHS:
+ // Take care not to overflow
+ if (heads==16) {
+ if(cylinders>61439) cylinders=61439;
+ heads=15;
+ cylinders = (Bit16u)((Bit32u)(cylinders)*16/15);
+ }
+ // then go through the large bitshift process
+ case ATA_TRANSLATION_LARGE:
+ while(cylinders > 1024) {
+ cylinders >>= 1;
+ heads <<= 1;
+
+ // If we max out the head count
+ if (heads > 127) break;
+ }
+ break;
+ }
+ // clip to 1024 cylinders in lchs
+ if (cylinders > 1024) cylinders=1024;
+ BX_INFO(" LCHS=%d/%d/%d\n", cylinders, heads, spt);
+
+ write_word(ebda_seg,&EbdaData->ata.devices[device].lchs.heads, heads);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].lchs.cylinders, cylinders);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].lchs.spt, spt);
+
+ // fill hdidmap
+ write_byte(ebda_seg,&EbdaData->ata.hdidmap[hdcount], device);
+ hdcount++;
+ }
+
+ // Now we send a IDENTIFY command to ATAPI device
+ if(type == ATA_TYPE_ATAPI) {
+
+ Bit8u type, removable, mode;
+ Bit16u blksize;
+
+ //Temporary values to do the transfer
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].device,ATA_DEVICE_CDROM);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].mode, ATA_MODE_PIO16);
+
+ if (ata_cmd_data_in(device,ATA_CMD_IDENTIFY_DEVICE_PACKET, 1, 0, 0, 0, 0L, get_SS(),buffer) != 0)
+ BX_PANIC("ata-detect: Failed to detect ATAPI device\n");
+
+ type = read_byte(get_SS(),buffer+1) & 0x1f;
+ removable = (read_byte(get_SS(),buffer+0) & 0x80) ? 1 : 0;
+ mode = read_byte(get_SS(),buffer+96) ? ATA_MODE_PIO32 : ATA_MODE_PIO16;
+ blksize = 2048;
+
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].device, type);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].removable, removable);
+ write_byte(ebda_seg,&EbdaData->ata.devices[device].mode, mode);
+ write_word(ebda_seg,&EbdaData->ata.devices[device].blksize, blksize);
+
+ // fill cdidmap
+ write_byte(ebda_seg,&EbdaData->ata.cdidmap[cdcount], device);
+ cdcount++;
+ }
+
+ {
+ Bit32u sizeinmb;
+ Bit16u ataversion;
+ Bit8u c, i, version, model[41];
+
+ switch (type) {
+ case ATA_TYPE_ATA:
+ sizeinmb = read_dword(ebda_seg,&EbdaData->ata.devices[device].sectors);
+ sizeinmb >>= 11;
+ case ATA_TYPE_ATAPI:
+ // Read ATA/ATAPI version
+ ataversion=((Bit16u)(read_byte(get_SS(),buffer+161))<<8)|read_byte(get_SS(),buffer+160);
+ for(version=15;version>0;version--) {
+ if((ataversion&(1<<version))!=0)
+ break;
+ }
+
+ // Read model name
+ for(i=0;i<20;i++){
+ write_byte(get_SS(),model+(i*2),read_byte(get_SS(),buffer+(i*2)+54+1));
+ write_byte(get_SS(),model+(i*2)+1,read_byte(get_SS(),buffer+(i*2)+54));
+ }
+
+ // Reformat
+ write_byte(get_SS(),model+40,0x00);
+ for(i=39;i>0;i--){
+ if(read_byte(get_SS(),model+i)==0x20)
+ write_byte(get_SS(),model+i,0x00);
+ else break;
+ }
+ break;
+ }
+
+ switch (type) {
+ case ATA_TYPE_ATA:
+ printf("ata%d %s: ",channel,slave?" slave":"master");
+ i=0; while(c=read_byte(get_SS(),model+i++)) printf("%c",c);
+ printf(" ATA-%d Hard-Disk (%lu MBytes)\n", version, sizeinmb);
+ break;
+ case ATA_TYPE_ATAPI:
+ printf("ata%d %s: ",channel,slave?" slave":"master");
+ i=0; while(c=read_byte(get_SS(),model+i++)) printf("%c",c);
+ if(read_byte(ebda_seg,&EbdaData->ata.devices[device].device)==ATA_DEVICE_CDROM)
+ printf(" ATAPI-%d CD-Rom/DVD-Rom\n",version);
+ else
+ printf(" ATAPI-%d Device\n",version);
+ break;
+ case ATA_TYPE_UNKNOWN:
+ printf("ata%d %s: Unknown device\n",channel,slave?" slave":"master");
+ break;
+ }
+ }
+ }
+
+ // Store the devices counts
+ write_byte(ebda_seg,&EbdaData->ata.hdcount, hdcount);
+ write_byte(ebda_seg,&EbdaData->ata.cdcount, cdcount);
+ write_byte(0x40,0x75, hdcount);
+
+ printf("\n");
+
+ // FIXME : should use bios=cmos|auto|disable bits
+ // FIXME : should know about translation bits
+ // FIXME : move hard_drive_post here
+
+}
+
+// ---------------------------------------------------------------------------
+// ATA/ATAPI driver : software reset
+// ---------------------------------------------------------------------------
+// ATA-3
+// 8.2.1 Software reset - Device 0
+
+void ata_reset(device)
+Bit16u device;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit16u iobase1, iobase2;
+ Bit8u channel, slave, sn, sc;
+ Bit16u max;
+
+ channel = device / 2;
+ slave = device % 2;
+
+ iobase1 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase1);
+ iobase2 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase2);
+
+ // Reset
+
+// 8.2.1 (a) -- set SRST in DC
+ outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN | ATA_CB_DC_SRST);
+
+// 8.2.1 (b) -- wait for BSY
+ max=0xff;
+ while(--max>0) {
+ Bit8u status = inb(iobase1+ATA_CB_STAT);
+ if ((status & ATA_CB_STAT_BSY) != 0) break;
+ }
+
+// 8.2.1 (f) -- clear SRST
+ outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
+
+ if (read_byte(ebda_seg,&EbdaData->ata.devices[device].type) != ATA_TYPE_NONE) {
+
+// 8.2.1 (g) -- check for sc==sn==0x01
+ // select device
+ outb(iobase1+ATA_CB_DH, slave?ATA_CB_DH_DEV1:ATA_CB_DH_DEV0);
+ sc = inb(iobase1+ATA_CB_SC);
+ sn = inb(iobase1+ATA_CB_SN);
+
+ if ( (sc==0x01) && (sn==0x01) ) {
+
+// 8.2.1 (h) -- wait for not BSY
+ max=0xff;
+ while(--max>0) {
+ Bit8u status = inb(iobase1+ATA_CB_STAT);
+ if ((status & ATA_CB_STAT_BSY) == 0) break;
+ }
+ }
+ }
+
+// 8.2.1 (i) -- wait for DRDY
+ max=0xfff;
+ while(--max>0) {
+ Bit8u status = inb(iobase1+ATA_CB_STAT);
+ if ((status & ATA_CB_STAT_RDY) != 0) break;
+ }
+
+ // Enable interrupts
+ outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15);
+}
+
+// ---------------------------------------------------------------------------
+// ATA/ATAPI driver : execute a non data command
+// ---------------------------------------------------------------------------
+
+Bit16u ata_cmd_non_data()
+{return 0;}
+
+// ---------------------------------------------------------------------------
+// ATA/ATAPI driver : execute a data-in command
+// ---------------------------------------------------------------------------
+ // returns
+ // 0 : no error
+ // 1 : BUSY bit set
+ // 2 : read error
+ // 3 : expected DRQ=1
+ // 4 : no sectors left to read/verify
+ // 5 : more sectors to read/verify
+ // 6 : no sectors left to write
+ // 7 : more sectors to write
+Bit16u ata_cmd_data_in(device, command, count, cylinder, head, sector, lba, segment, offset)
+Bit16u device, command, count, cylinder, head, sector, segment, offset;
+Bit32u lba;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit16u iobase1, iobase2, blksize;
+ Bit8u channel, slave;
+ Bit8u status, current, mode;
+
+ channel = device / 2;
+ slave = device % 2;
+
+ iobase1 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase1);
+ iobase2 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase2);
+ mode = read_byte(ebda_seg, &EbdaData->ata.devices[device].mode);
+ blksize = 0x200; // was = read_word(ebda_seg, &EbdaData->ata.devices[device].blksize);
+ if (mode == ATA_MODE_PIO32) blksize>>=2;
+ else blksize>>=1;
+
+ // sector will be 0 only on lba access. Convert to lba-chs
+ if (sector == 0) {
+ sector = (Bit16u) (lba & 0x000000ffL);
+ lba >>= 8;
+ cylinder = (Bit16u) (lba & 0x0000ffffL);
+ lba >>= 16;
+ head = ((Bit16u) (lba & 0x0000000fL)) | 0x40;
+ }
+
+ // Reset count of transferred data
+ write_word(ebda_seg, &EbdaData->ata.trsfsectors,0);
+ write_dword(ebda_seg, &EbdaData->ata.trsfbytes,0L);
+ current = 0;
+
+ status = inb(iobase1 + ATA_CB_STAT);
+ if (status & ATA_CB_STAT_BSY) return 1;
+
+ outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
+ outb(iobase1 + ATA_CB_FR, 0x00);
+ outb(iobase1 + ATA_CB_SC, count);
+ outb(iobase1 + ATA_CB_SN, sector);
+ outb(iobase1 + ATA_CB_CL, cylinder & 0x00ff);
+ outb(iobase1 + ATA_CB_CH, cylinder >> 8);
+ outb(iobase1 + ATA_CB_DH, (slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0) | (Bit8u) head );
+ outb(iobase1 + ATA_CB_CMD, command);
+
+ while (1) {
+ status = inb(iobase1 + ATA_CB_STAT);
+ if ( !(status & ATA_CB_STAT_BSY) ) break;
+ }
+
+ if (status & ATA_CB_STAT_ERR) {
+ BX_DEBUG_ATA("ata_cmd_data_in : read error\n");
+ return 2;
+ } else if ( !(status & ATA_CB_STAT_DRQ) ) {
+ BX_DEBUG_ATA("ata_cmd_data_in : DRQ not set (status %02x)\n", (unsigned) status);
+ return 3;
+ }
+
+ // FIXME : move seg/off translation here
+
+ASM_START
+ sti ;; enable higher priority interrupts
+ASM_END
+
+ while (1) {
+
+ASM_START
+ push bp
+ mov bp, sp
+ mov di, _ata_cmd_data_in.offset + 2[bp]
+ mov ax, _ata_cmd_data_in.segment + 2[bp]
+ mov cx, _ata_cmd_data_in.blksize + 2[bp]
+
+ ;; adjust if there will be an overrun. 2K max sector size
+ cmp di, #0xf800 ;;
+ jbe ata_in_no_adjust
+
+ata_in_adjust:
+ sub di, #0x0800 ;; sub 2 kbytes from offset
+ add ax, #0x0080 ;; add 2 Kbytes to segment
+
+ata_in_no_adjust:
+ mov es, ax ;; segment in es
+
+ mov dx, _ata_cmd_data_in.iobase1 + 2[bp] ;; ATA data read port
+
+ mov ah, _ata_cmd_data_in.mode + 2[bp]
+ cmp ah, #ATA_MODE_PIO32
+ je ata_in_32
+
+ata_in_16:
+ rep
+ insw ;; CX words transfered from port(DX) to ES:[DI]
+ jmp ata_in_done
+
+ata_in_32:
+ rep
+ insd ;; CX dwords transfered from port(DX) to ES:[DI]
+
+ata_in_done:
+ mov _ata_cmd_data_in.offset + 2[bp], di
+ mov _ata_cmd_data_in.segment + 2[bp], es
+ pop bp
+ASM_END
+
+ current++;
+ write_word(ebda_seg, &EbdaData->ata.trsfsectors,current);
+ count--;
+ status = inb(iobase1 + ATA_CB_STAT);
+ if (count == 0) {
+ if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) )
+ != ATA_CB_STAT_RDY ) {
+ BX_DEBUG_ATA("ata_cmd_data_in : no sectors left (status %02x)\n", (unsigned) status);
+ return 4;
+ }
+ break;
+ }
+ else {
+ if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) )
+ != (ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ) ) {
+ BX_DEBUG_ATA("ata_cmd_data_in : more sectors left (status %02x)\n", (unsigned) status);
+ return 5;
+ }
+ continue;
+ }
+ }
+ // Enable interrupts
+ outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15);
+ return 0;
+}
+
+// ---------------------------------------------------------------------------
+// ATA/ATAPI driver : execute a data-out command
+// ---------------------------------------------------------------------------
+ // returns
+ // 0 : no error
+ // 1 : BUSY bit set
+ // 2 : read error
+ // 3 : expected DRQ=1
+ // 4 : no sectors left to read/verify
+ // 5 : more sectors to read/verify
+ // 6 : no sectors left to write
+ // 7 : more sectors to write
+Bit16u ata_cmd_data_out(device, command, count, cylinder, head, sector, lba, segment, offset)
+Bit16u device, command, count, cylinder, head, sector, segment, offset;
+Bit32u lba;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit16u iobase1, iobase2, blksize;
+ Bit8u channel, slave;
+ Bit8u status, current, mode;
+
+ channel = device / 2;
+ slave = device % 2;
+
+ iobase1 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase1);
+ iobase2 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase2);
+ mode = read_byte(ebda_seg, &EbdaData->ata.devices[device].mode);
+ blksize = 0x200; // was = read_word(ebda_seg, &EbdaData->ata.devices[device].blksize);
+ if (mode == ATA_MODE_PIO32) blksize>>=2;
+ else blksize>>=1;
+
+ // sector will be 0 only on lba access. Convert to lba-chs
+ if (sector == 0) {
+ sector = (Bit16u) (lba & 0x000000ffL);
+ lba >>= 8;
+ cylinder = (Bit16u) (lba & 0x0000ffffL);
+ lba >>= 16;
+ head = ((Bit16u) (lba & 0x0000000fL)) | 0x40;
+ }
+
+ // Reset count of transferred data
+ write_word(ebda_seg, &EbdaData->ata.trsfsectors,0);
+ write_dword(ebda_seg, &EbdaData->ata.trsfbytes,0L);
+ current = 0;
+
+ status = inb(iobase1 + ATA_CB_STAT);
+ if (status & ATA_CB_STAT_BSY) return 1;
+
+ outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
+ outb(iobase1 + ATA_CB_FR, 0x00);
+ outb(iobase1 + ATA_CB_SC, count);
+ outb(iobase1 + ATA_CB_SN, sector);
+ outb(iobase1 + ATA_CB_CL, cylinder & 0x00ff);
+ outb(iobase1 + ATA_CB_CH, cylinder >> 8);
+ outb(iobase1 + ATA_CB_DH, (slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0) | (Bit8u) head );
+ outb(iobase1 + ATA_CB_CMD, command);
+
+ while (1) {
+ status = inb(iobase1 + ATA_CB_STAT);
+ if ( !(status & ATA_CB_STAT_BSY) ) break;
+ }
+
+ if (status & ATA_CB_STAT_ERR) {
+ BX_DEBUG_ATA("ata_cmd_data_out : read error\n");
+ return 2;
+ } else if ( !(status & ATA_CB_STAT_DRQ) ) {
+ BX_DEBUG_ATA("ata_cmd_data_out : DRQ not set (status %02x)\n", (unsigned) status);
+ return 3;
+ }
+
+ // FIXME : move seg/off translation here
+
+ASM_START
+ sti ;; enable higher priority interrupts
+ASM_END
+
+ while (1) {
+
+ASM_START
+ push bp
+ mov bp, sp
+ mov si, _ata_cmd_data_out.offset + 2[bp]
+ mov ax, _ata_cmd_data_out.segment + 2[bp]
+ mov cx, _ata_cmd_data_out.blksize + 2[bp]
+
+ ;; adjust if there will be an overrun. 2K max sector size
+ cmp si, #0xf800 ;;
+ jbe ata_out_no_adjust
+
+ata_out_adjust:
+ sub si, #0x0800 ;; sub 2 kbytes from offset
+ add ax, #0x0080 ;; add 2 Kbytes to segment
+
+ata_out_no_adjust:
+ mov es, ax ;; segment in es
+
+ mov dx, _ata_cmd_data_out.iobase1 + 2[bp] ;; ATA data write port
+
+ mov ah, _ata_cmd_data_out.mode + 2[bp]
+ cmp ah, #ATA_MODE_PIO32
+ je ata_out_32
+
+ata_out_16:
+ seg ES
+ rep
+ outsw ;; CX words transfered from port(DX) to ES:[SI]
+ jmp ata_out_done
+
+ata_out_32:
+ seg ES
+ rep
+ outsd ;; CX dwords transfered from port(DX) to ES:[SI]
+
+ata_out_done:
+ mov _ata_cmd_data_out.offset + 2[bp], si
+ mov _ata_cmd_data_out.segment + 2[bp], es
+ pop bp
+ASM_END
+
+ current++;
+ write_word(ebda_seg, &EbdaData->ata.trsfsectors,current);
+ count--;
+ status = inb(iobase1 + ATA_CB_STAT);
+ if (count == 0) {
+ if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) )
+ != ATA_CB_STAT_RDY ) {
+ BX_DEBUG_ATA("ata_cmd_data_out : no sectors left (status %02x)\n", (unsigned) status);
+ return 6;
+ }
+ break;
+ }
+ else {
+ if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) )
+ != (ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ) ) {
+ BX_DEBUG_ATA("ata_cmd_data_out : more sectors left (status %02x)\n", (unsigned) status);
+ return 7;
+ }
+ continue;
+ }
+ }
+ // Enable interrupts
+ outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15);
+ return 0;
+}
+
+// ---------------------------------------------------------------------------
+// ATA/ATAPI driver : execute a packet command
+// ---------------------------------------------------------------------------
+ // returns
+ // 0 : no error
+ // 1 : error in parameters
+ // 2 : BUSY bit set
+ // 3 : error
+ // 4 : not ready
+Bit16u ata_cmd_packet(device, cmdlen, cmdseg, cmdoff, header, length, inout, bufseg, bufoff)
+Bit8u cmdlen,inout;
+Bit16u device,cmdseg, cmdoff, bufseg, bufoff;
+Bit16u header;
+Bit32u length;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit16u iobase1, iobase2;
+ Bit16u lcount, lbefore, lafter, count;
+ Bit8u channel, slave;
+ Bit8u status, mode, lmode;
+ Bit32u total, transfer;
+
+ channel = device / 2;
+ slave = device % 2;
+
+ // Data out is not supported yet
+ if (inout == ATA_DATA_OUT) {
+ BX_INFO("ata_cmd_packet: DATA_OUT not supported yet\n");
+ return 1;
+ }
+
+ // The header length must be even
+ if (header & 1) {
+ BX_DEBUG_ATA("ata_cmd_packet : header must be even (%04x)\n",header);
+ return 1;
+ }
+
+ iobase1 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase1);
+ iobase2 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase2);
+ mode = read_byte(ebda_seg, &EbdaData->ata.devices[device].mode);
+ transfer= 0L;
+
+ if (cmdlen < 12) cmdlen=12;
+ if (cmdlen > 12) cmdlen=16;
+ cmdlen>>=1;
+
+ // Reset count of transferred data
+ write_word(ebda_seg, &EbdaData->ata.trsfsectors,0);
+ write_dword(ebda_seg, &EbdaData->ata.trsfbytes,0L);
+
+ status = inb(iobase1 + ATA_CB_STAT);
+ if (status & ATA_CB_STAT_BSY) return 2;
+
+ outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
+ // outb(iobase1 + ATA_CB_FR, 0x00);
+ // outb(iobase1 + ATA_CB_SC, 0x00);
+ // outb(iobase1 + ATA_CB_SN, 0x00);
+ outb(iobase1 + ATA_CB_CL, 0xfff0 & 0x00ff);
+ outb(iobase1 + ATA_CB_CH, 0xfff0 >> 8);
+ outb(iobase1 + ATA_CB_DH, slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0);
+ outb(iobase1 + ATA_CB_CMD, ATA_CMD_PACKET);
+
+ // Device should ok to receive command
+ while (1) {
+ status = inb(iobase1 + ATA_CB_STAT);
+ if ( !(status & ATA_CB_STAT_BSY) ) break;
+ }
+
+ if (status & ATA_CB_STAT_ERR) {
+ BX_DEBUG_ATA("ata_cmd_packet : error, status is %02x\n",status);
+ return 3;
+ } else if ( !(status & ATA_CB_STAT_DRQ) ) {
+ BX_DEBUG_ATA("ata_cmd_packet : DRQ not set (status %02x)\n", (unsigned) status);
+ return 4;
+ }
+
+ // Normalize address
+ cmdseg += (cmdoff / 16);
+ cmdoff %= 16;
+
+ // Send command to device
+ASM_START
+ sti ;; enable higher priority interrupts
+
+ push bp
+ mov bp, sp
+
+ mov si, _ata_cmd_packet.cmdoff + 2[bp]
+ mov ax, _ata_cmd_packet.cmdseg + 2[bp]
+ mov cx, _ata_cmd_packet.cmdlen + 2[bp]
+ mov es, ax ;; segment in es
+
+ mov dx, _ata_cmd_packet.iobase1 + 2[bp] ;; ATA data write port
+
+ seg ES
+ rep
+ outsw ;; CX words transfered from port(DX) to ES:[SI]
+
+ pop bp
+ASM_END
+
+ if (inout == ATA_DATA_NO) {
+ status = inb(iobase1 + ATA_CB_STAT);
+ }
+ else {
+ while (1) {
+
+ status = inb(iobase1 + ATA_CB_STAT);
+
+ // Check if command completed
+ if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_DRQ) ) ==0 ) break;
+
+ if (status & ATA_CB_STAT_ERR) {
+ BX_DEBUG_ATA("ata_cmd_packet : error (status %02x)\n",status);
+ return 3;
+ }
+
+ // Device must be ready to send data
+ if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) )
+ != (ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ) ) {
+ BX_DEBUG_ATA("ata_cmd_packet : not ready (status %02x)\n", status);
+ return 4;
+ }
+
+ // Normalize address
+ bufseg += (bufoff / 16);
+ bufoff %= 16;
+
+ // Get the byte count
+ lcount = ((Bit16u)(inb(iobase1 + ATA_CB_CH))<<8)+inb(iobase1 + ATA_CB_CL);
+
+ // adjust to read what we want
+ if(header>lcount) {
+ lbefore=lcount;
+ header-=lcount;
+ lcount=0;
+ }
+ else {
+ lbefore=header;
+ header=0;
+ lcount-=lbefore;
+ }
+
+ if(lcount>length) {
+ lafter=lcount-length;
+ lcount=length;
+ length=0;
+ }
+ else {
+ lafter=0;
+ length-=lcount;
+ }
+
+ // Save byte count
+ count = lcount;
+
+ BX_DEBUG_ATA("Trying to read %04x bytes (%04x %04x %04x) ",lbefore+lcount+lafter,lbefore,lcount,lafter);
+ BX_DEBUG_ATA("to 0x%04x:0x%04x\n",bufseg,bufoff);
+
+ // If counts not dividable by 4, use 16bits mode
+ lmode = mode;
+ if (lbefore & 0x03) lmode=ATA_MODE_PIO16;
+ if (lcount & 0x03) lmode=ATA_MODE_PIO16;
+ if (lafter & 0x03) lmode=ATA_MODE_PIO16;
+
+ // adds an extra byte if count are odd. before is always even
+ if (lcount & 0x01) {
+ lcount+=1;
+ if ((lafter > 0) && (lafter & 0x01)) {
+ lafter-=1;
+ }
+ }
+
+ if (lmode == ATA_MODE_PIO32) {
+ lcount>>=2; lbefore>>=2; lafter>>=2;
+ }
+ else {
+ lcount>>=1; lbefore>>=1; lafter>>=1;
+ }
+
+ ; // FIXME bcc bug
+
+ASM_START
+ push bp
+ mov bp, sp
+
+ mov dx, _ata_cmd_packet.iobase1 + 2[bp] ;; ATA data read port
+
+ mov cx, _ata_cmd_packet.lbefore + 2[bp]
+ jcxz ata_packet_no_before
+
+ mov ah, _ata_cmd_packet.lmode + 2[bp]
+ cmp ah, #ATA_MODE_PIO32
+ je ata_packet_in_before_32
+
+ata_packet_in_before_16:
+ in ax, dx
+ loop ata_packet_in_before_16
+ jmp ata_packet_no_before
+
+ata_packet_in_before_32:
+ push eax
+ata_packet_in_before_32_loop:
+ in eax, dx
+ loop ata_packet_in_before_32_loop
+ pop eax
+
+ata_packet_no_before:
+ mov cx, _ata_cmd_packet.lcount + 2[bp]
+ jcxz ata_packet_after
+
+ mov di, _ata_cmd_packet.bufoff + 2[bp]
+ mov ax, _ata_cmd_packet.bufseg + 2[bp]
+ mov es, ax
+
+ mov ah, _ata_cmd_packet.lmode + 2[bp]
+ cmp ah, #ATA_MODE_PIO32
+ je ata_packet_in_32
+
+ata_packet_in_16:
+ rep
+ insw ;; CX words transfered tp port(DX) to ES:[DI]
+ jmp ata_packet_after
+
+ata_packet_in_32:
+ rep
+ insd ;; CX dwords transfered to port(DX) to ES:[DI]
+
+ata_packet_after:
+ mov cx, _ata_cmd_packet.lafter + 2[bp]
+ jcxz ata_packet_done
+
+ mov ah, _ata_cmd_packet.lmode + 2[bp]
+ cmp ah, #ATA_MODE_PIO32
+ je ata_packet_in_after_32
+
+ata_packet_in_after_16:
+ in ax, dx
+ loop ata_packet_in_after_16
+ jmp ata_packet_done
+
+ata_packet_in_after_32:
+ push eax
+ata_packet_in_after_32_loop:
+ in eax, dx
+ loop ata_packet_in_after_32_loop
+ pop eax
+
+ata_packet_done:
+ pop bp
+ASM_END
+
+ // Compute new buffer address
+ bufoff += count;
+
+ // Save transferred bytes count
+ transfer += count;
+ write_dword(ebda_seg, &EbdaData->ata.trsfbytes,transfer);
+ }
+ }
+
+ // Final check, device must be ready
+ if ( (status & (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR) )
+ != ATA_CB_STAT_RDY ) {
+ BX_DEBUG_ATA("ata_cmd_packet : not ready (status %02x)\n", (unsigned) status);
+ return 4;
+ }
+
+ // Enable interrupts
+ outb(iobase2+ATA_CB_DC, ATA_CB_DC_HD15);
+ return 0;
+}
+
+// ---------------------------------------------------------------------------
+// End of ATA/ATAPI Driver
+// ---------------------------------------------------------------------------
+
+// ---------------------------------------------------------------------------
+// Start of ATA/ATAPI generic functions
+// ---------------------------------------------------------------------------
+
+ Bit16u
+atapi_get_sense(device)
+ Bit16u device;
+{
+ Bit8u atacmd[12];
+ Bit8u buffer[16];
+ Bit8u i;
+
+ memsetb(get_SS(),atacmd,0,12);
+
+ // Request SENSE
+ atacmd[0]=0x03;
+ atacmd[4]=0x20;
+ if (ata_cmd_packet(device, 12, get_SS(), atacmd, 0, 16L, ATA_DATA_IN, get_SS(), buffer) != 0)
+ return 0x0002;
+
+ if ((buffer[0] & 0x7e) == 0x70) {
+ return (((Bit16u)buffer[2]&0x0f)*0x100)+buffer[12];
+ }
+
+ return 0;
+}
+
+ Bit16u
+atapi_is_ready(device)
+ Bit16u device;
+{
+ Bit8u atacmd[12];
+ Bit8u buffer[];
+
+ memsetb(get_SS(),atacmd,0,12);
+
+ // Test Unit Ready
+ if (ata_cmd_packet(device, 12, get_SS(), atacmd, 0, 0L, ATA_DATA_NO, get_SS(), buffer) != 0)
+ return 0x000f;
+
+ if (atapi_get_sense(device) !=0 ) {
+ memsetb(get_SS(),atacmd,0,12);
+
+ // try to send Test Unit Ready again
+ if (ata_cmd_packet(device, 12, get_SS(), atacmd, 0, 0L, ATA_DATA_NO, get_SS(), buffer) != 0)
+ return 0x000f;
+
+ return atapi_get_sense(device);
+ }
+ return 0;
+}
+
+ Bit16u
+atapi_is_cdrom(device)
+ Bit8u device;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+
+ if (device >= BX_MAX_ATA_DEVICES)
+ return 0;
+
+ if (read_byte(ebda_seg,&EbdaData->ata.devices[device].type) != ATA_TYPE_ATAPI)
+ return 0;
+
+ if (read_byte(ebda_seg,&EbdaData->ata.devices[device].device) != ATA_DEVICE_CDROM)
+ return 0;
+
+ return 1;
+}
+
+// ---------------------------------------------------------------------------
+// End of ATA/ATAPI generic functions
+// ---------------------------------------------------------------------------
+
+#endif // BX_USE_ATADRV
+
+#if BX_ELTORITO_BOOT
+
+// ---------------------------------------------------------------------------
+// Start of El-Torito boot functions
+// ---------------------------------------------------------------------------
+
+ void
+cdemu_init()
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+
+ // the only important data is this one for now
+ write_byte(ebda_seg,&EbdaData->cdemu.active,0x00);
+}
+
+ Bit8u
+cdemu_isactive()
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+
+ return(read_byte(ebda_seg,&EbdaData->cdemu.active));
+}
+
+ Bit8u
+cdemu_emulated_drive()
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+
+ return(read_byte(ebda_seg,&EbdaData->cdemu.emulated_drive));
+}
+
+static char isotag[6]="CD001";
+static char eltorito[24]="EL TORITO SPECIFICATION";
+//
+// Returns ah: emulated drive, al: error code
+//
+ Bit16u
+cdrom_boot()
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit8u atacmd[12], buffer[2048];
+ Bit32u lba;
+ Bit16u boot_segment, nbsectors, i, error;
+ Bit8u device;
+
+ // Find out the first cdrom
+ for (device=0; device<BX_MAX_ATA_DEVICES;device++) {
+ if (atapi_is_cdrom(device)) break;
+ }
+
+ // if not found
+ if(device >= BX_MAX_ATA_DEVICES) return 2;
+
+ // Read the Boot Record Volume Descriptor
+ memsetb(get_SS(),atacmd,0,12);
+ atacmd[0]=0x28; // READ command
+ atacmd[7]=(0x01 & 0xff00) >> 8; // Sectors
+ atacmd[8]=(0x01 & 0x00ff); // Sectors
+ atacmd[2]=(0x11 & 0xff000000) >> 24; // LBA
+ atacmd[3]=(0x11 & 0x00ff0000) >> 16;
+ atacmd[4]=(0x11 & 0x0000ff00) >> 8;
+ atacmd[5]=(0x11 & 0x000000ff);
+ if((error = ata_cmd_packet(device, 12, get_SS(), atacmd, 0, 2048L, ATA_DATA_IN, get_SS(), buffer)) != 0)
+ return 3;
+
+ // Validity checks
+ if(buffer[0]!=0)return 4;
+ for(i=0;i<5;i++){
+ if(buffer[1+i]!=read_byte(0xf000,&isotag[i]))return 5;
+ }
+ for(i=0;i<23;i++)
+ if(buffer[7+i]!=read_byte(0xf000,&eltorito[i]))return 6;
+
+ // ok, now we calculate the Boot catalog address
+ lba=buffer[0x4A]*0x1000000+buffer[0x49]*0x10000+buffer[0x48]*0x100+buffer[0x47];
+
+ // And we read the Boot Catalog
+ memsetb(get_SS(),atacmd,0,12);
+ atacmd[0]=0x28; // READ command
+ atacmd[7]=(0x01 & 0xff00) >> 8; // Sectors
+ atacmd[8]=(0x01 & 0x00ff); // Sectors
+ atacmd[2]=(lba & 0xff000000) >> 24; // LBA
+ atacmd[3]=(lba & 0x00ff0000) >> 16;
+ atacmd[4]=(lba & 0x0000ff00) >> 8;
+ atacmd[5]=(lba & 0x000000ff);
+ if((error = ata_cmd_packet(device, 12, get_SS(), atacmd, 0, 2048L, ATA_DATA_IN, get_SS(), buffer)) != 0)
+ return 7;
+
+ // Validation entry
+ if(buffer[0x00]!=0x01)return 8; // Header
+ if(buffer[0x01]!=0x00)return 9; // Platform
+ if(buffer[0x1E]!=0x55)return 10; // key 1
+ if(buffer[0x1F]!=0xAA)return 10; // key 2
+
+ // Initial/Default Entry
+ if(buffer[0x20]!=0x88)return 11; // Bootable
+
+ write_byte(ebda_seg,&EbdaData->cdemu.media,buffer[0x21]);
+ if(buffer[0x21]==0){
+ // FIXME ElTorito Hardcoded. cdrom is hardcoded as device 0xE0.
+ // Win2000 cd boot needs to know it booted from cd
+ write_byte(ebda_seg,&EbdaData->cdemu.emulated_drive,0xE0);
+ }
+ else if(buffer[0x21]<4)
+ write_byte(ebda_seg,&EbdaData->cdemu.emulated_drive,0x00);
+ else
+ write_byte(ebda_seg,&EbdaData->cdemu.emulated_drive,0x80);
+
+ write_byte(ebda_seg,&EbdaData->cdemu.controller_index,device/2);
+ write_byte(ebda_seg,&EbdaData->cdemu.device_spec,device%2);
+
+ boot_segment=buffer[0x23]*0x100+buffer[0x22];
+ if(boot_segment==0x0000)boot_segment=0x07C0;
+
+ write_word(ebda_seg,&EbdaData->cdemu.load_segment,boot_segment);
+ write_word(ebda_seg,&EbdaData->cdemu.buffer_segment,0x0000);
+
+ nbsectors=buffer[0x27]*0x100+buffer[0x26];
+ write_word(ebda_seg,&EbdaData->cdemu.sector_count,nbsectors);
+
+ lba=buffer[0x2B]*0x1000000+buffer[0x2A]*0x10000+buffer[0x29]*0x100+buffer[0x28];
+ write_dword(ebda_seg,&EbdaData->cdemu.ilba,lba);
+
+ // And we read the image in memory
+ memsetb(get_SS(),atacmd,0,12);
+ atacmd[0]=0x28; // READ command
+ atacmd[7]=((1+(nbsectors-1)/4) & 0xff00) >> 8; // Sectors
+ atacmd[8]=((1+(nbsectors-1)/4) & 0x00ff); // Sectors
+ atacmd[2]=(lba & 0xff000000) >> 24; // LBA
+ atacmd[3]=(lba & 0x00ff0000) >> 16;
+ atacmd[4]=(lba & 0x0000ff00) >> 8;
+ atacmd[5]=(lba & 0x000000ff);
+ if((error = ata_cmd_packet(device, 12, get_SS(), atacmd, 0, nbsectors*512L, ATA_DATA_IN, boot_segment,0)) != 0)
+ return 12;
+
+ // Remember the media type
+ switch(read_byte(ebda_seg,&EbdaData->cdemu.media)) {
+ case 0x01: // 1.2M floppy
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.spt,15);
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.cylinders,80);
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.heads,2);
+ break;
+ case 0x02: // 1.44M floppy
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.spt,18);
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.cylinders,80);
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.heads,2);
+ break;
+ case 0x03: // 2.88M floppy
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.spt,36);
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.cylinders,80);
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.heads,2);
+ break;
+ case 0x04: // Harddrive
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.spt,read_byte(boot_segment,446+6)&0x3f);
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.cylinders,
+ (read_byte(boot_segment,446+6)<<2) + read_byte(boot_segment,446+7) + 1);
+ write_word(ebda_seg,&EbdaData->cdemu.vdevice.heads,read_byte(boot_segment,446+5) + 1);
+ break;
+ }
+
+ if(read_byte(ebda_seg,&EbdaData->cdemu.media)!=0) {
+ // Increase bios installed hardware number of devices
+ if(read_byte(ebda_seg,&EbdaData->cdemu.emulated_drive)==0x00)
+ write_byte(0x40,0x10,read_byte(0x40,0x10)|0x41);
+ else
+ write_byte(ebda_seg, &EbdaData->ata.hdcount, read_byte(ebda_seg, &EbdaData->ata.hdcount) + 1);
+ }
+
+
+ // everything is ok, so from now on, the emulation is active
+ if(read_byte(ebda_seg,&EbdaData->cdemu.media)!=0)
+ write_byte(ebda_seg,&EbdaData->cdemu.active,0x01);
+
+ // return the boot drive + no error
+ return (read_byte(ebda_seg,&EbdaData->cdemu.emulated_drive)*0x100)+0;
+}
+
+// ---------------------------------------------------------------------------
+// End of El-Torito boot functions
+// ---------------------------------------------------------------------------
+#endif // BX_ELTORITO_BOOT
+
+ void
+int14_function(regs, ds, iret_addr)
+ pusha_regs_t regs; // regs pushed from PUSHA instruction
+ Bit16u ds; // previous DS:, DS set to 0x0000 by asm wrapper
+ iret_addr_t iret_addr; // CS,IP,Flags pushed from original INT call
+{
+ Bit16u addr,timer,val16;
+ Bit8u timeout;
+
+ ASM_START
+ sti
+ ASM_END
+
+ addr = read_word(0x0040, (regs.u.r16.dx << 1));
+ timeout = read_byte(0x0040, 0x007C + regs.u.r16.dx);
+ if ((regs.u.r16.dx < 4) && (addr > 0)) {
+ switch (regs.u.r8.ah) {
+ case 0:
+ outb(addr+3, inb(addr+3) | 0x80);
+ if (regs.u.r8.al & 0xE0 == 0) {
+ outb(addr, 0x17);
+ outb(addr+1, 0x04);
+ } else {
+ val16 = 0x600 >> ((regs.u.r8.al & 0xE0) >> 5);
+ outb(addr, val16 & 0xFF);
+ outb(addr+1, val16 >> 8);
+ }
+ outb(addr+3, regs.u.r8.al & 0x1F);
+ regs.u.r8.ah = inb(addr+5);
+ regs.u.r8.al = inb(addr+6);
+ ClearCF(iret_addr.flags);
+ break;
+ case 1:
+ timer = read_word(0x0040, 0x006C);
+ while (((inb(addr+5) & 0x60) != 0x60) && (timeout)) {
+ val16 = read_word(0x0040, 0x006C);
+ if (val16 != timer) {
+ timer = val16;
+ timeout--;
+ }
+ }
+ if (timeout) outb(addr, regs.u.r8.al);
+ regs.u.r8.ah = inb(addr+5);
+ if (!timeout) regs.u.r8.ah |= 0x80;
+ ClearCF(iret_addr.flags);
+ break;
+ case 2:
+ timer = read_word(0x0040, 0x006C);
+ while (((inb(addr+5) & 0x01) == 0) && (timeout)) {
+ val16 = read_word(0x0040, 0x006C);
+ if (val16 != timer) {
+ timer = val16;
+ timeout--;
+ }
+ }
+ if (timeout) {
+ regs.u.r8.ah = 0;
+ regs.u.r8.al = inb(addr);
+ } else {
+ regs.u.r8.ah = inb(addr+5);
+ }
+ ClearCF(iret_addr.flags);
+ break;
+ case 3:
+ regs.u.r8.ah = inb(addr+5);
+ regs.u.r8.al = inb(addr+6);
+ ClearCF(iret_addr.flags);
+ break;
+ default:
+ SetCF(iret_addr.flags); // Unsupported
+ }
+ } else {
+ SetCF(iret_addr.flags); // Unsupported
+ }
+}
+
+ void
+int15_function(regs, ES, DS, FLAGS)
+ pusha_regs_t regs; // REGS pushed via pusha
+ Bit16u ES, DS, FLAGS;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ bx_bool prev_a20_enable;
+ Bit16u base15_00;
+ Bit8u base23_16;
+ Bit16u ss;
+ Bit16u CX,DX;
+
+ Bit16u bRegister;
+ Bit8u irqDisable;
+
+BX_DEBUG_INT15("int15 AX=%04x\n",regs.u.r16.ax);
+
+ switch (regs.u.r8.ah) {
+ case 0x24: /* A20 Control */
+ switch (regs.u.r8.al) {
+ case 0x00:
+ set_enable_a20(0);
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ break;
+ case 0x01:
+ set_enable_a20(1);
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ break;
+ case 0x02:
+ regs.u.r8.al = (inb(0x92) >> 1) & 0x01;
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ break;
+ case 0x03:
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ regs.u.r16.bx = 3;
+ break;
+ default:
+ BX_INFO("int15: Func 24h, subfunc %02xh, A20 gate control not supported\n", (unsigned) regs.u.r8.al);
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ }
+ break;
+
+ case 0x41:
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ break;
+
+ case 0x4f:
+ /* keyboard intercept */
+#if BX_CPU < 2
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+#else
+ // nop
+#endif
+ SET_CF();
+ break;
+
+ case 0x52: // removable media eject
+ CLEAR_CF();
+ regs.u.r8.ah = 0; // "ok ejection may proceed"
+ break;
+
+ case 0x83: {
+ if( regs.u.r8.al == 0 ) {
+ // Set Interval requested.
+ if( ( read_byte( 0x40, 0xA0 ) & 1 ) == 0 ) {
+ // Interval not already set.
+ write_byte( 0x40, 0xA0, 1 ); // Set status byte.
+ write_word( 0x40, 0x98, ES ); // Byte location, segment
+ write_word( 0x40, 0x9A, regs.u.r16.bx ); // Byte location, offset
+ write_word( 0x40, 0x9C, regs.u.r16.dx ); // Low word, delay
+ write_word( 0x40, 0x9E, regs.u.r16.cx ); // High word, delay.
+ CLEAR_CF( );
+ irqDisable = inb( 0xA1 );
+ outb( 0xA1, irqDisable & 0xFE );
+ bRegister = inb_cmos( 0xB ); // Unmask IRQ8 so INT70 will get through.
+ outb_cmos( 0xB, bRegister | 0x40 ); // Turn on the Periodic Interrupt timer
+ } else {
+ // Interval already set.
+ BX_DEBUG_INT15("int15: Func 83h, failed, already waiting.\n" );
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ }
+ } else if( regs.u.r8.al == 1 ) {
+ // Clear Interval requested
+ write_byte( 0x40, 0xA0, 0 ); // Clear status byte
+ CLEAR_CF( );
+ bRegister = inb_cmos( 0xB );
+ outb_cmos( 0xB, bRegister & ~0x40 ); // Turn off the Periodic Interrupt timer
+ } else {
+ BX_DEBUG_INT15("int15: Func 83h, failed.\n" );
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ regs.u.r8.al--;
+ }
+
+ break;
+ }
+
+ case 0x87:
+#if BX_CPU < 3
+# error "Int15 function 87h not supported on < 80386"
+#endif
+ // +++ should probably have descriptor checks
+ // +++ should have exception handlers
+
+ // turn off interrupts
+ASM_START
+ cli
+ASM_END
+
+ prev_a20_enable = set_enable_a20(1); // enable A20 line
+
+ // 128K max of transfer on 386+ ???
+ // source == destination ???
+
+ // ES:SI points to descriptor table
+ // offset use initially comments
+ // ==============================================
+ // 00..07 Unused zeros Null descriptor
+ // 08..0f GDT zeros filled in by BIOS
+ // 10..17 source ssssssss source of data
+ // 18..1f dest dddddddd destination of data
+ // 20..27 CS zeros filled in by BIOS
+ // 28..2f SS zeros filled in by BIOS
+
+ //es:si
+ //eeee0
+ //0ssss
+ //-----
+
+// check for access rights of source & dest here
+
+ // Initialize GDT descriptor
+ base15_00 = (ES << 4) + regs.u.r16.si;
+ base23_16 = ES >> 12;
+ if (base15_00 < (ES<<4))
+ base23_16++;
+ write_word(ES, regs.u.r16.si+0x08+0, 47); // limit 15:00 = 6 * 8bytes/descriptor
+ write_word(ES, regs.u.r16.si+0x08+2, base15_00);// base 15:00
+ write_byte(ES, regs.u.r16.si+0x08+4, base23_16);// base 23:16
+ write_byte(ES, regs.u.r16.si+0x08+5, 0x93); // access
+ write_word(ES, regs.u.r16.si+0x08+6, 0x0000); // base 31:24/reserved/limit 19:16
+
+ // Initialize CS descriptor
+ write_word(ES, regs.u.r16.si+0x20+0, 0xffff);// limit 15:00 = normal 64K limit
+ write_word(ES, regs.u.r16.si+0x20+2, 0x0000);// base 15:00
+ write_byte(ES, regs.u.r16.si+0x20+4, 0x000f);// base 23:16
+ write_byte(ES, regs.u.r16.si+0x20+5, 0x9b); // access
+ write_word(ES, regs.u.r16.si+0x20+6, 0x0000);// base 31:24/reserved/limit 19:16
+
+ // Initialize SS descriptor
+ ss = get_SS();
+ base15_00 = ss << 4;
+ base23_16 = ss >> 12;
+ write_word(ES, regs.u.r16.si+0x28+0, 0xffff); // limit 15:00 = normal 64K limit
+ write_word(ES, regs.u.r16.si+0x28+2, base15_00);// base 15:00
+ write_byte(ES, regs.u.r16.si+0x28+4, base23_16);// base 23:16
+ write_byte(ES, regs.u.r16.si+0x28+5, 0x93); // access
+ write_word(ES, regs.u.r16.si+0x28+6, 0x0000); // base 31:24/reserved/limit 19:16
+
+ CX = regs.u.r16.cx;
+ASM_START
+ // Compile generates locals offset info relative to SP.
+ // Get CX (word count) from stack.
+ mov bx, sp
+ SEG SS
+ mov cx, _int15_function.CX [bx]
+
+ // since we need to set SS:SP, save them to the BDA
+ // for future restore
+ push eax
+ xor eax, eax
+ mov ds, ax
+ mov 0x0469, ss
+ mov 0x0467, sp
+
+ SEG ES
+ lgdt [si + 0x08]
+ SEG CS
+ lidt [pmode_IDT_info]
+ ;; perhaps do something with IDT here
+
+ ;; set PE bit in CR0
+ mov eax, cr0
+ or al, #0x01
+ mov cr0, eax
+ ;; far jump to flush CPU queue after transition to protected mode
+ JMP_AP(0x0020, protected_mode)
+
+protected_mode:
+ ;; GDT points to valid descriptor table, now load SS, DS, ES
+ mov ax, #0x28 ;; 101 000 = 5th descriptor in table, TI=GDT, RPL=00
+ mov ss, ax
+ mov ax, #0x10 ;; 010 000 = 2nd descriptor in table, TI=GDT, RPL=00
+ mov ds, ax
+ mov ax, #0x18 ;; 011 000 = 3rd descriptor in table, TI=GDT, RPL=00
+ mov es, ax
+ xor si, si
+ xor di, di
+ cld
+ rep
+ movsw ;; move CX words from DS:SI to ES:DI
+
+ ;; make sure DS and ES limits are 64KB
+ mov ax, #0x28
+ mov ds, ax
+ mov es, ax
+
+ ;; reset PG bit in CR0 ???
+ mov eax, cr0
+ and al, #0xFE
+ mov cr0, eax
+
+ ;; far jump to flush CPU queue after transition to real mode
+ JMP_AP(0xf000, real_mode)
+
+real_mode:
+ ;; restore IDT to normal real-mode defaults
+ SEG CS
+ lidt [rmode_IDT_info]
+
+ // restore SS:SP from the BDA
+ xor ax, ax
+ mov ds, ax
+ mov ss, 0x0469
+ mov sp, 0x0467
+ pop eax
+ASM_END
+
+ set_enable_a20(prev_a20_enable);
+
+ // turn back on interrupts
+ASM_START
+ sti
+ASM_END
+
+ regs.u.r8.ah = 0;
+ CLEAR_CF();
+ break;
+
+
+ case 0x88:
+ // Get the amount of extended memory (above 1M)
+#if BX_CPU < 2
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ SET_CF();
+#else
+ regs.u.r8.al = inb_cmos(0x30);
+ regs.u.r8.ah = inb_cmos(0x31);
+
+ // limit to 15M
+ if(regs.u.r16.ax > 0x3c00)
+ regs.u.r16.ax = 0x3c00;
+
+ CLEAR_CF();
+#endif
+ break;
+
+ case 0x90:
+ /* Device busy interrupt. Called by Int 16h when no key available */
+ break;
+
+ case 0x91:
+ /* Interrupt complete. Called by Int 16h when key becomes available */
+ break;
+
+ case 0xbf:
+ BX_INFO("*** int 15h function AH=bf not yet supported!\n");
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ break;
+
+ case 0xC0:
+#if 0
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ break;
+#endif
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ regs.u.r16.bx = BIOS_CONFIG_TABLE;
+ ES = 0xF000;
+ break;
+
+ case 0xc1:
+ ES = ebda_seg;
+ CLEAR_CF();
+ break;
+
+ case 0xd8:
+ bios_printf(BIOS_PRINTF_DEBUG, "EISA BIOS not present\n");
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ break;
+
+ default:
+ BX_INFO("*** int 15h function AX=%04x, BX=%04x not yet supported!\n",
+ (unsigned) regs.u.r16.ax, (unsigned) regs.u.r16.bx);
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ break;
+ }
+}
+
+#if BX_USE_PS2_MOUSE
+ void
+int15_function_mouse(regs, ES, DS, FLAGS)
+ pusha_regs_t regs; // REGS pushed via pusha
+ Bit16u ES, DS, FLAGS;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit8u mouse_flags_1, mouse_flags_2;
+ Bit16u mouse_driver_seg;
+ Bit16u mouse_driver_offset;
+ Bit8u comm_byte, prev_command_byte;
+ Bit8u ret, mouse_data1, mouse_data2, mouse_data3;
+
+BX_DEBUG_INT15("int15 AX=%04x\n",regs.u.r16.ax);
+
+ switch (regs.u.r8.ah) {
+ case 0xC2:
+ // Return Codes status in AH
+ // =========================
+ // 00: success
+ // 01: invalid subfunction (AL > 7)
+ // 02: invalid input value (out of allowable range)
+ // 03: interface error
+ // 04: resend command received from mouse controller,
+ // device driver should attempt command again
+ // 05: cannot enable mouse, since no far call has been installed
+ // 80/86: mouse service not implemented
+
+ switch (regs.u.r8.al) {
+ case 0: // Disable/Enable Mouse
+BX_DEBUG_INT15("case 0:\n");
+ switch (regs.u.r8.bh) {
+ case 0: // Disable Mouse
+BX_DEBUG_INT15("case 0: disable mouse\n");
+ inhibit_mouse_int_and_events(); // disable IRQ12 and packets
+ ret = send_to_mouse_ctrl(0xF5); // disable mouse command
+ if (ret == 0) {
+ ret = get_mouse_data(&mouse_data1);
+ if ( (ret == 0) || (mouse_data1 == 0xFA) ) {
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ return;
+ }
+ }
+
+ // error
+ SET_CF();
+ regs.u.r8.ah = ret;
+ return;
+ break;
+
+ case 1: // Enable Mouse
+BX_DEBUG_INT15("case 1: enable mouse\n");
+ mouse_flags_2 = read_byte(ebda_seg, 0x0027);
+ if ( (mouse_flags_2 & 0x80) == 0 ) {
+ BX_DEBUG_INT15("INT 15h C2 Enable Mouse, no far call handler\n");
+ SET_CF(); // error
+ regs.u.r8.ah = 5; // no far call installed
+ return;
+ }
+ inhibit_mouse_int_and_events(); // disable IRQ12 and packets
+ ret = send_to_mouse_ctrl(0xF4); // enable mouse command
+ if (ret == 0) {
+ ret = get_mouse_data(&mouse_data1);
+ if ( (ret == 0) && (mouse_data1 == 0xFA) ) {
+ enable_mouse_int_and_events(); // turn IRQ12 and packet generation on
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ return;
+ }
+ }
+ SET_CF();
+ regs.u.r8.ah = ret;
+ return;
+
+ default: // invalid subfunction
+ BX_DEBUG_INT15("INT 15h C2 AL=0, BH=%02x\n", (unsigned) regs.u.r8.bh);
+ SET_CF(); // error
+ regs.u.r8.ah = 1; // invalid subfunction
+ return;
+ }
+ break;
+
+ case 1: // Reset Mouse
+ case 5: // Initialize Mouse
+BX_DEBUG_INT15("case 1 or 5:\n");
+ if (regs.u.r8.al == 5) {
+ if (regs.u.r8.bh != 3) {
+ SET_CF();
+ regs.u.r8.ah = 0x02; // invalid input
+ return;
+ }
+ mouse_flags_2 = read_byte(ebda_seg, 0x0027);
+ mouse_flags_2 = (mouse_flags_2 & 0x00) | regs.u.r8.bh;
+ mouse_flags_1 = 0x00;
+ write_byte(ebda_seg, 0x0026, mouse_flags_1);
+ write_byte(ebda_seg, 0x0027, mouse_flags_2);
+ }
+
+ inhibit_mouse_int_and_events(); // disable IRQ12 and packets
+ ret = send_to_mouse_ctrl(0xFF); // reset mouse command
+ if (ret == 0) {
+ ret = get_mouse_data(&mouse_data3);
+ // if no mouse attached, it will return RESEND
+ if (mouse_data3 == 0xfe) {
+ SET_CF();
+ return;
+ }
+ if (mouse_data3 != 0xfa)
+ BX_PANIC("Mouse reset returned %02x (should be ack)\n", (unsigned)mouse_data3);
+ if ( ret == 0 ) {
+ ret = get_mouse_data(&mouse_data1);
+ if ( ret == 0 ) {
+ ret = get_mouse_data(&mouse_data2);
+ if ( ret == 0 ) {
+ // turn IRQ12 and packet generation on
+ enable_mouse_int_and_events();
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ regs.u.r8.bl = mouse_data1;
+ regs.u.r8.bh = mouse_data2;
+ return;
+ }
+ }
+ }
+ }
+
+ // error
+ SET_CF();
+ regs.u.r8.ah = ret;
+ return;
+
+ case 2: // Set Sample Rate
+BX_DEBUG_INT15("case 2:\n");
+ switch (regs.u.r8.bh) {
+ case 0: mouse_data1 = 10; break; // 10 reports/sec
+ case 1: mouse_data1 = 20; break; // 20 reports/sec
+ case 2: mouse_data1 = 40; break; // 40 reports/sec
+ case 3: mouse_data1 = 60; break; // 60 reports/sec
+ case 4: mouse_data1 = 80; break; // 80 reports/sec
+ case 5: mouse_data1 = 100; break; // 100 reports/sec (default)
+ case 6: mouse_data1 = 200; break; // 200 reports/sec
+ default: mouse_data1 = 0;
+ }
+ if (mouse_data1 > 0) {
+ ret = send_to_mouse_ctrl(0xF3); // set sample rate command
+ if (ret == 0) {
+ ret = get_mouse_data(&mouse_data2);
+ ret = send_to_mouse_ctrl(mouse_data1);
+ ret = get_mouse_data(&mouse_data2);
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ } else {
+ // error
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ }
+ } else {
+ // error
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ }
+ break;
+
+ case 3: // Set Resolution
+BX_DEBUG_INT15("case 3:\n");
+ // BX:
+ // 0 = 25 dpi, 1 count per millimeter
+ // 1 = 50 dpi, 2 counts per millimeter
+ // 2 = 100 dpi, 4 counts per millimeter
+ // 3 = 200 dpi, 8 counts per millimeter
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ break;
+
+ case 4: // Get Device ID
+BX_DEBUG_INT15("case 4:\n");
+ inhibit_mouse_int_and_events(); // disable IRQ12 and packets
+ ret = send_to_mouse_ctrl(0xF2); // get mouse ID command
+ if (ret == 0) {
+ ret = get_mouse_data(&mouse_data1);
+ ret = get_mouse_data(&mouse_data2);
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ regs.u.r8.bh = mouse_data2;
+ } else {
+ // error
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ }
+ break;
+
+ case 6: // Return Status & Set Scaling Factor...
+BX_DEBUG_INT15("case 6:\n");
+ switch (regs.u.r8.bh) {
+ case 0: // Return Status
+ comm_byte = inhibit_mouse_int_and_events(); // disable IRQ12 and packets
+ ret = send_to_mouse_ctrl(0xE9); // get mouse info command
+ if (ret == 0) {
+ ret = get_mouse_data(&mouse_data1);
+ if (mouse_data1 != 0xfa)
+ BX_PANIC("Mouse status returned %02x (should be ack)\n", (unsigned)mouse_data1);
+ if (ret == 0) {
+ ret = get_mouse_data(&mouse_data1);
+ if ( ret == 0 ) {
+ ret = get_mouse_data(&mouse_data2);
+ if ( ret == 0 ) {
+ ret = get_mouse_data(&mouse_data3);
+ if ( ret == 0 ) {
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ regs.u.r8.bl = mouse_data1;
+ regs.u.r8.cl = mouse_data2;
+ regs.u.r8.dl = mouse_data3;
+ set_kbd_command_byte(comm_byte); // restore IRQ12 and serial enable
+ return;
+ }
+ }
+ }
+ }
+ }
+
+ // error
+ SET_CF();
+ regs.u.r8.ah = ret;
+ set_kbd_command_byte(comm_byte); // restore IRQ12 and serial enable
+ return;
+
+ case 1: // Set Scaling Factor to 1:1
+ case 2: // Set Scaling Factor to 2:1
+ comm_byte = inhibit_mouse_int_and_events(); // disable IRQ12 and packets
+ if (regs.u.r8.bh == 1) {
+ ret = send_to_mouse_ctrl(0xE6);
+ } else {
+ ret = send_to_mouse_ctrl(0xE7);
+ }
+ if (ret == 0) {
+ get_mouse_data(&mouse_data1);
+ ret = (mouse_data1 != 0xFA);
+ }
+ if (ret == 0) {
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ } else {
+ // error
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ }
+ set_kbd_command_byte(comm_byte); // restore IRQ12 and serial enable
+ break;
+
+ default:
+ BX_PANIC("INT 15h C2 AL=6, BH=%02x\n", (unsigned) regs.u.r8.bh);
+ }
+ break;
+
+ case 7: // Set Mouse Handler Address
+BX_DEBUG_INT15("case 7:\n");
+ mouse_driver_seg = ES;
+ mouse_driver_offset = regs.u.r16.bx;
+ write_word(ebda_seg, 0x0022, mouse_driver_offset);
+ write_word(ebda_seg, 0x0024, mouse_driver_seg);
+ mouse_flags_2 = read_byte(ebda_seg, 0x0027);
+ if (mouse_driver_offset == 0 && mouse_driver_seg == 0) {
+ /* remove handler */
+ if ( (mouse_flags_2 & 0x80) != 0 ) {
+ mouse_flags_2 &= ~0x80;
+ inhibit_mouse_int_and_events(); // disable IRQ12 and packets
+ }
+ }
+ else {
+ /* install handler */
+ mouse_flags_2 |= 0x80;
+ }
+ write_byte(ebda_seg, 0x0027, mouse_flags_2);
+ CLEAR_CF();
+ regs.u.r8.ah = 0;
+ break;
+
+ default:
+BX_DEBUG_INT15("case default:\n");
+ regs.u.r8.ah = 1; // invalid function
+ SET_CF();
+ }
+ break;
+
+ default:
+ BX_INFO("*** int 15h function AX=%04x, BX=%04x not yet supported!\n",
+ (unsigned) regs.u.r16.ax, (unsigned) regs.u.r16.bx);
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ break;
+ }
+}
+#endif
+
+
+void set_e820_range(ES, DI, start, end, type)
+ Bit16u ES;
+ Bit16u DI;
+ Bit32u start;
+ Bit32u end;
+ Bit16u type;
+{
+ write_word(ES, DI, start);
+ write_word(ES, DI+2, start >> 16);
+ write_word(ES, DI+4, 0x00);
+ write_word(ES, DI+6, 0x00);
+
+ end -= start;
+ write_word(ES, DI+8, end);
+ write_word(ES, DI+10, end >> 16);
+ write_word(ES, DI+12, 0x0000);
+ write_word(ES, DI+14, 0x0000);
+
+ write_word(ES, DI+16, type);
+ write_word(ES, DI+18, 0x0);
+}
+
+ void
+int15_function32(regs, ES, DS, FLAGS)
+ pushad_regs_t regs; // REGS pushed via pushad
+ Bit16u ES, DS, FLAGS;
+{
+ Bit32u extended_memory_size=0; // 64bits long
+ Bit16u CX,DX;
+
+BX_DEBUG_INT15("int15 AX=%04x\n",regs.u.r16.ax);
+
+ switch (regs.u.r8.ah) {
+ case 0x86:
+ // Wait for CX:DX microseconds. currently using the
+ // refresh request port 0x61 bit4, toggling every 15usec
+
+ CX = regs.u.r16.cx;
+ DX = regs.u.r16.dx;
+
+ASM_START
+ sti
+
+ ;; Get the count in eax
+ mov bx, sp
+ SEG SS
+ mov ax, _int15_function.CX [bx]
+ shl eax, #16
+ SEG SS
+ mov ax, _int15_function.DX [bx]
+
+ ;; convert to numbers of 15usec ticks
+ mov ebx, #15
+ xor edx, edx
+ div eax, ebx
+ mov ecx, eax
+
+ ;; wait for ecx number of refresh requests
+ in al, #0x61
+ and al,#0x10
+ mov ah, al
+
+ or ecx, ecx
+ je int1586_tick_end
+int1586_tick:
+ in al, #0x61
+ and al,#0x10
+ cmp al, ah
+ je int1586_tick
+ mov ah, al
+ dec ecx
+ jnz int1586_tick
+int1586_tick_end:
+ASM_END
+
+ break;
+
+ case 0xe8:
+ switch(regs.u.r8.al)
+ {
+ case 0x20: // coded by osmaker aka K.J.
+ if(regs.u.r32.edx == 0x534D4150)
+ {
+ switch(regs.u.r16.bx)
+ {
+ case 0:
+ set_e820_range(ES, regs.u.r16.di,
+ 0x0000000L, 0x0009fc00L, 1);
+ regs.u.r32.ebx = 1;
+ regs.u.r32.eax = 0x534D4150;
+ regs.u.r32.ecx = 0x14;
+ CLEAR_CF();
+ return;
+ break;
+ case 1:
+ set_e820_range(ES, regs.u.r16.di,
+ 0x0009fc00L, 0x000a0000L, 2);
+ regs.u.r32.ebx = 2;
+ regs.u.r32.eax = 0x534D4150;
+ regs.u.r32.ecx = 0x14;
+ CLEAR_CF();
+ return;
+ break;
+ case 2:
+ set_e820_range(ES, regs.u.r16.di,
+ 0x000e8000L, 0x00100000L, 2);
+ regs.u.r32.ebx = 3;
+ regs.u.r32.eax = 0x534D4150;
+ regs.u.r32.ecx = 0x14;
+ CLEAR_CF();
+ return;
+ break;
+ case 3:
+ extended_memory_size = inb_cmos(0x35);
+ extended_memory_size <<= 8;
+ extended_memory_size |= inb_cmos(0x34);
+ extended_memory_size *= 64;
+ if(extended_memory_size > 0x3bc000) // greater than EFF00000???
+ {
+ extended_memory_size = 0x3bc000; // everything after this is reserved memory until we get to 0x100000000
+ }
+ extended_memory_size *= 1024;
+ extended_memory_size += (16L * 1024 * 1024);
+
+ if(extended_memory_size <= (16L * 1024 * 1024))
+ {
+ extended_memory_size = inb_cmos(0x31);
+ extended_memory_size <<= 8;
+ extended_memory_size |= inb_cmos(0x30);
+ extended_memory_size *= 1024;
+ }
+
+ set_e820_range(ES, regs.u.r16.di,
+ 0x00100000L, extended_memory_size, 1);
+ regs.u.r32.ebx = 4;
+ regs.u.r32.eax = 0x534D4150;
+ regs.u.r32.ecx = 0x14;
+ CLEAR_CF();
+ return;
+ break;
+ case 4:
+ /* 256KB BIOS area at the end of 4 GB */
+ set_e820_range(ES, regs.u.r16.di,
+ 0xfffc0000L, 0x00000000L, 2);
+ regs.u.r32.ebx = 0;
+ regs.u.r32.eax = 0x534D4150;
+ regs.u.r32.ecx = 0x14;
+ CLEAR_CF();
+ return;
+ default: /* AX=E820, DX=534D4150, BX unrecognized */
+ goto int15_unimplemented;
+ break;
+ }
+ } else {
+ // if DX != 0x534D4150)
+ goto int15_unimplemented;
+ }
+ break;
+
+ case 0x01:
+ // do we have any reason to fail here ?
+ CLEAR_CF();
+
+ // my real system sets ax and bx to 0
+ // this is confirmed by Ralph Brown list
+ // but syslinux v1.48 is known to behave
+ // strangely if ax is set to 0
+ // regs.u.r16.ax = 0;
+ // regs.u.r16.bx = 0;
+
+ // Get the amount of extended memory (above 1M)
+ regs.u.r8.cl = inb_cmos(0x30);
+ regs.u.r8.ch = inb_cmos(0x31);
+
+ // limit to 15M
+ if(regs.u.r16.cx > 0x3c00)
+ {
+ regs.u.r16.cx = 0x3c00;
+ }
+
+ // Get the amount of extended memory above 16M in 64k blocs
+ regs.u.r8.dl = inb_cmos(0x34);
+ regs.u.r8.dh = inb_cmos(0x35);
+
+ // Set configured memory equal to extended memory
+ regs.u.r16.ax = regs.u.r16.cx;
+ regs.u.r16.bx = regs.u.r16.dx;
+ break;
+ default: /* AH=0xE8?? but not implemented */
+ goto int15_unimplemented;
+ }
+ break;
+ int15_unimplemented:
+ // fall into the default
+ default:
+ BX_INFO("*** int 15h function AX=%04x, BX=%04x not yet supported!\n",
+ (unsigned) regs.u.r16.ax, (unsigned) regs.u.r16.bx);
+ SET_CF();
+ regs.u.r8.ah = UNSUPPORTED_FUNCTION;
+ break;
+ }
+}
+
+ void
+int16_function(DI, SI, BP, SP, BX, DX, CX, AX, FLAGS)
+ Bit16u DI, SI, BP, SP, BX, DX, CX, AX, FLAGS;
+{
+ Bit8u scan_code, ascii_code, shift_flags, count;
+ Bit16u kbd_code, max;
+
+ BX_DEBUG_INT16("int16: AX=%04x BX=%04x CX=%04x DX=%04x \n", AX, BX, CX, DX);
+
+ switch (GET_AH()) {
+ case 0x00: /* read keyboard input */
+
+ if ( !dequeue_key(&scan_code, &ascii_code, 1) ) {
+ BX_PANIC("KBD: int16h: out of keyboard input\n");
+ }
+ if (scan_code !=0 && ascii_code == 0xF0) ascii_code = 0;
+ else if (ascii_code == 0xE0) ascii_code = 0;
+ AX = (scan_code << 8) | ascii_code;
+ break;
+
+ case 0x01: /* check keyboard status */
+ if ( !dequeue_key(&scan_code, &ascii_code, 0) ) {
+ SET_ZF();
+ return;
+ }
+ if (scan_code !=0 && ascii_code == 0xF0) ascii_code = 0;
+ else if (ascii_code == 0xE0) ascii_code = 0;
+ AX = (scan_code << 8) | ascii_code;
+ CLEAR_ZF();
+ break;
+
+ case 0x02: /* get shift flag status */
+ shift_flags = read_byte(0x0040, 0x17);
+ SET_AL(shift_flags);
+ break;
+
+ case 0x05: /* store key-stroke into buffer */
+ if ( !enqueue_key(GET_CH(), GET_CL()) ) {
+ SET_AL(1);
+ }
+ else {
+ SET_AL(0);
+ }
+ break;
+
+ case 0x09: /* GET KEYBOARD FUNCTIONALITY */
+ // bit Bochs Description
+ // 7 0 reserved
+ // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
+ // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
+ // 4 1 INT 16/AH=0Ah supported
+ // 3 0 INT 16/AX=0306h supported
+ // 2 0 INT 16/AX=0305h supported
+ // 1 0 INT 16/AX=0304h supported
+ // 0 0 INT 16/AX=0300h supported
+ //
+ SET_AL(0x30);
+ break;
+
+ case 0x0A: /* GET KEYBOARD ID */
+ count = 2;
+ kbd_code = 0x0;
+ outb(0x60, 0xf2);
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x00);
+ if (max>0x0) {
+ if ((inb(0x60) == 0xfa)) {
+ do {
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x00);
+ if (max>0x0) {
+ kbd_code >>= 8;
+ kbd_code |= (inb(0x60) << 8);
+ }
+ } while (--count>0);
+ }
+ }
+ BX=kbd_code;
+ break;
+
+ case 0x10: /* read MF-II keyboard input */
+
+ if ( !dequeue_key(&scan_code, &ascii_code, 1) ) {
+ BX_PANIC("KBD: int16h: out of keyboard input\n");
+ }
+ if (scan_code !=0 && ascii_code == 0xF0) ascii_code = 0;
+ AX = (scan_code << 8) | ascii_code;
+ break;
+
+ case 0x11: /* check MF-II keyboard status */
+ if ( !dequeue_key(&scan_code, &ascii_code, 0) ) {
+ SET_ZF();
+ return;
+ }
+ if (scan_code !=0 && ascii_code == 0xF0) ascii_code = 0;
+ AX = (scan_code << 8) | ascii_code;
+ CLEAR_ZF();
+ break;
+
+ case 0x12: /* get extended keyboard status */
+ shift_flags = read_byte(0x0040, 0x17);
+ SET_AL(shift_flags);
+ shift_flags = read_byte(0x0040, 0x18) & 0x73;
+ shift_flags |= read_byte(0x0040, 0x96) & 0x0c;
+ SET_AH(shift_flags);
+ BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
+ break;
+
+ case 0x92: /* keyboard capability check called by DOS 5.0+ keyb */
+ SET_AH(0x80); // function int16 ah=0x10-0x12 supported
+ break;
+
+ case 0xA2: /* 122 keys capability check called by DOS 5.0+ keyb */
+ // don't change AH : function int16 ah=0x20-0x22 NOT supported
+ break;
+
+ case 0x6F:
+ if (GET_AL() == 0x08)
+ SET_AH(0x02); // unsupported, aka normal keyboard
+
+ default:
+ BX_INFO("KBD: unsupported int 16h function %02x\n", GET_AH());
+ }
+}
+
+ unsigned int
+dequeue_key(scan_code, ascii_code, incr)
+ Bit8u *scan_code;
+ Bit8u *ascii_code;
+ unsigned int incr;
+{
+ Bit16u buffer_start, buffer_end, buffer_head, buffer_tail;
+ Bit16u ss;
+ Bit8u acode, scode;
+
+#if BX_CPU < 2
+ buffer_start = 0x001E;
+ buffer_end = 0x003E;
+#else
+ buffer_start = read_word(0x0040, 0x0080);
+ buffer_end = read_word(0x0040, 0x0082);
+#endif
+
+ buffer_head = read_word(0x0040, 0x001a);
+ buffer_tail = read_word(0x0040, 0x001c);
+
+ if (buffer_head != buffer_tail) {
+ ss = get_SS();
+ acode = read_byte(0x0040, buffer_head);
+ scode = read_byte(0x0040, buffer_head+1);
+ write_byte(ss, ascii_code, acode);
+ write_byte(ss, scan_code, scode);
+
+ if (incr) {
+ buffer_head += 2;
+ if (buffer_head >= buffer_end)
+ buffer_head = buffer_start;
+ write_word(0x0040, 0x001a, buffer_head);
+ }
+ return(1);
+ }
+ else {
+ return(0);
+ }
+}
+
+static char panic_msg_keyb_buffer_full[] = "%s: keyboard input buffer full\n";
+
+ Bit8u
+inhibit_mouse_int_and_events()
+{
+ Bit8u command_byte, prev_command_byte;
+
+ // Turn off IRQ generation and aux data line
+ if ( inb(0x64) & 0x02 )
+ BX_PANIC(panic_msg_keyb_buffer_full,"inhibmouse");
+ outb(0x64, 0x20); // get command byte
+ while ( (inb(0x64) & 0x01) != 0x01 );
+ prev_command_byte = inb(0x60);
+ command_byte = prev_command_byte;
+ //while ( (inb(0x64) & 0x02) );
+ if ( inb(0x64) & 0x02 )
+ BX_PANIC(panic_msg_keyb_buffer_full,"inhibmouse");
+ command_byte &= 0xfd; // turn off IRQ 12 generation
+ command_byte |= 0x20; // disable mouse serial clock line
+ outb(0x64, 0x60); // write command byte
+ outb(0x60, command_byte);
+ return(prev_command_byte);
+}
+
+ void
+enable_mouse_int_and_events()
+{
+ Bit8u command_byte;
+
+ // Turn on IRQ generation and aux data line
+ if ( inb(0x64) & 0x02 )
+ BX_PANIC(panic_msg_keyb_buffer_full,"enabmouse");
+ outb(0x64, 0x20); // get command byte
+ while ( (inb(0x64) & 0x01) != 0x01 );
+ command_byte = inb(0x60);
+ //while ( (inb(0x64) & 0x02) );
+ if ( inb(0x64) & 0x02 )
+ BX_PANIC(panic_msg_keyb_buffer_full,"enabmouse");
+ command_byte |= 0x02; // turn on IRQ 12 generation
+ command_byte &= 0xdf; // enable mouse serial clock line
+ outb(0x64, 0x60); // write command byte
+ outb(0x60, command_byte);
+}
+
+ Bit8u
+send_to_mouse_ctrl(sendbyte)
+ Bit8u sendbyte;
+{
+ Bit8u response;
+
+ // wait for chance to write to ctrl
+ if ( inb(0x64) & 0x02 )
+ BX_PANIC(panic_msg_keyb_buffer_full,"sendmouse");
+ outb(0x64, 0xD4);
+ outb(0x60, sendbyte);
+ return(0);
+}
+
+
+ Bit8u
+get_mouse_data(data)
+ Bit8u *data;
+{
+ Bit8u response;
+ Bit16u ss;
+
+ while ( (inb(0x64) & 0x21) != 0x21 ) {
+ }
+
+ response = inb(0x60);
+
+ ss = get_SS();
+ write_byte(ss, data, response);
+ return(0);
+}
+
+ void
+set_kbd_command_byte(command_byte)
+ Bit8u command_byte;
+{
+ if ( inb(0x64) & 0x02 )
+ BX_PANIC(panic_msg_keyb_buffer_full,"setkbdcomm");
+ outb(0x64, 0xD4);
+
+ outb(0x64, 0x60); // write command byte
+ outb(0x60, command_byte);
+}
+
+ void
+int09_function(DI, SI, BP, SP, BX, DX, CX, AX)
+ Bit16u DI, SI, BP, SP, BX, DX, CX, AX;
+{
+ Bit8u scancode, asciicode, shift_flags;
+ Bit8u mf2_flags, mf2_state, led_flags;
+
+ //
+ // DS has been set to F000 before call
+ //
+
+
+ scancode = GET_AL();
+
+ if (scancode == 0) {
+ BX_INFO("KBD: int09 handler: AL=0\n");
+ return;
+ }
+
+
+ shift_flags = read_byte(0x0040, 0x17);
+ mf2_flags = read_byte(0x0040, 0x18);
+ mf2_state = read_byte(0x0040, 0x96);
+ led_flags = read_byte(0x0040, 0x97);
+ asciicode = 0;
+
+ switch (scancode) {
+ case 0x3a: /* Caps Lock press */
+ shift_flags ^= 0x40;
+ write_byte(0x0040, 0x17, shift_flags);
+ mf2_flags |= 0x40;
+ led_flags ^= 0x04;
+ write_byte(0x0040, 0x18, mf2_flags);
+ write_byte(0x0040, 0x97, led_flags);
+ break;
+ case 0xba: /* Caps Lock release */
+ mf2_flags &= ~0x40;
+ write_byte(0x0040, 0x18, mf2_flags);
+ break;
+
+ case 0x2a: /* L Shift press */
+ shift_flags |= 0x02;
+ write_byte(0x0040, 0x17, shift_flags);
+ break;
+ case 0xaa: /* L Shift release */
+ shift_flags &= ~0x02;
+ write_byte(0x0040, 0x17, shift_flags);
+ break;
+
+ case 0x36: /* R Shift press */
+ shift_flags |= 0x01;
+ write_byte(0x0040, 0x17, shift_flags);
+ break;
+ case 0xb6: /* R Shift release */
+ shift_flags &= ~0x01;
+ write_byte(0x0040, 0x17, shift_flags);
+ break;
+
+ case 0x1d: /* Ctrl press */
+ if ((mf2_state & 0x01) == 0) {
+ shift_flags |= 0x04;
+ write_byte(0x0040, 0x17, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state |= 0x04;
+ write_byte(0x0040, 0x96, mf2_state);
+ } else {
+ mf2_flags |= 0x01;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ }
+ break;
+ case 0x9d: /* Ctrl release */
+ if ((mf2_state & 0x01) == 0) {
+ shift_flags &= ~0x04;
+ write_byte(0x0040, 0x17, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state &= ~0x04;
+ write_byte(0x0040, 0x96, mf2_state);
+ } else {
+ mf2_flags &= ~0x01;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ }
+ break;
+
+ case 0x38: /* Alt press */
+ shift_flags |= 0x08;
+ write_byte(0x0040, 0x17, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state |= 0x08;
+ write_byte(0x0040, 0x96, mf2_state);
+ } else {
+ mf2_flags |= 0x02;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ break;
+ case 0xb8: /* Alt release */
+ shift_flags &= ~0x08;
+ write_byte(0x0040, 0x17, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state &= ~0x08;
+ write_byte(0x0040, 0x96, mf2_state);
+ } else {
+ mf2_flags &= ~0x02;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ break;
+
+ case 0x45: /* Num Lock press */
+ if ((mf2_state & 0x03) == 0) {
+ mf2_flags |= 0x20;
+ write_byte(0x0040, 0x18, mf2_flags);
+ shift_flags ^= 0x20;
+ led_flags ^= 0x02;
+ write_byte(0x0040, 0x17, shift_flags);
+ write_byte(0x0040, 0x97, led_flags);
+ }
+ break;
+ case 0xc5: /* Num Lock release */
+ if ((mf2_state & 0x03) == 0) {
+ mf2_flags &= ~0x20;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ break;
+
+ case 0x46: /* Scroll Lock press */
+ mf2_flags |= 0x10;
+ write_byte(0x0040, 0x18, mf2_flags);
+ shift_flags ^= 0x10;
+ led_flags ^= 0x01;
+ write_byte(0x0040, 0x17, shift_flags);
+ write_byte(0x0040, 0x97, led_flags);
+ break;
+
+ case 0xc6: /* Scroll Lock release */
+ mf2_flags &= ~0x10;
+ write_byte(0x0040, 0x18, mf2_flags);
+ break;
+
+ default:
+ if (scancode & 0x80) {
+ break; /* toss key releases ... */
+ }
+ if (scancode > MAX_SCAN_CODE) {
+ BX_INFO("KBD: int09h_handler(): unknown scancode read: 0x%02x!\n", scancode);
+ return;
+ }
+ if (shift_flags & 0x08) { /* ALT */
+ asciicode = scan_to_scanascii[scancode].alt;
+ scancode = scan_to_scanascii[scancode].alt >> 8;
+ } else if (shift_flags & 0x04) { /* CONTROL */
+ asciicode = scan_to_scanascii[scancode].control;
+ scancode = scan_to_scanascii[scancode].control >> 8;
+ } else if (shift_flags & 0x03) { /* LSHIFT + RSHIFT */
+ /* check if lock state should be ignored
+ * because a SHIFT key are pressed */
+
+ if (shift_flags & scan_to_scanascii[scancode].lock_flags) {
+ asciicode = scan_to_scanascii[scancode].normal;
+ scancode = scan_to_scanascii[scancode].normal >> 8;
+ } else {
+ asciicode = scan_to_scanascii[scancode].shift;
+ scancode = scan_to_scanascii[scancode].shift >> 8;
+ }
+ } else {
+ /* check if lock is on */
+ if (shift_flags & scan_to_scanascii[scancode].lock_flags) {
+ asciicode = scan_to_scanascii[scancode].shift;
+ scancode = scan_to_scanascii[scancode].shift >> 8;
+ } else {
+ asciicode = scan_to_scanascii[scancode].normal;
+ scancode = scan_to_scanascii[scancode].normal >> 8;
+ }
+ }
+ if (scancode==0 && asciicode==0) {
+ BX_INFO("KBD: int09h_handler(): scancode & asciicode are zero?\n");
+ }
+ enqueue_key(scancode, asciicode);
+ break;
+ }
+ if ((scancode & 0x7f) != 0x1d) {
+ mf2_state &= ~0x01;
+ }
+ mf2_state &= ~0x02;
+ write_byte(0x0040, 0x96, mf2_state);
+}
+
+ unsigned int
+enqueue_key(scan_code, ascii_code)
+ Bit8u scan_code, ascii_code;
+{
+ Bit16u buffer_start, buffer_end, buffer_head, buffer_tail, temp_tail;
+
+#if BX_CPU < 2
+ buffer_start = 0x001E;
+ buffer_end = 0x003E;
+#else
+ buffer_start = read_word(0x0040, 0x0080);
+ buffer_end = read_word(0x0040, 0x0082);
+#endif
+
+ buffer_head = read_word(0x0040, 0x001A);
+ buffer_tail = read_word(0x0040, 0x001C);
+
+ temp_tail = buffer_tail;
+ buffer_tail += 2;
+ if (buffer_tail >= buffer_end)
+ buffer_tail = buffer_start;
+
+ if (buffer_tail == buffer_head) {
+ return(0);
+ }
+
+ write_byte(0x0040, temp_tail, ascii_code);
+ write_byte(0x0040, temp_tail+1, scan_code);
+ write_word(0x0040, 0x001C, buffer_tail);
+ return(1);
+}
+
+
+ void
+int74_function(make_farcall, Z, Y, X, status)
+ Bit16u make_farcall, Z, Y, X, status;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit8u in_byte, index, package_count;
+ Bit8u mouse_flags_1, mouse_flags_2;
+
+BX_DEBUG_INT74("entering int74_function\n");
+ make_farcall = 0;
+
+ in_byte = inb(0x64);
+ if ( (in_byte & 0x21) != 0x21 ) {
+ return;
+ }
+ in_byte = inb(0x60);
+BX_DEBUG_INT74("int74: read byte %02x\n", in_byte);
+
+ mouse_flags_1 = read_byte(ebda_seg, 0x0026);
+ mouse_flags_2 = read_byte(ebda_seg, 0x0027);
+
+ if ( (mouse_flags_2 & 0x80) != 0x80 ) {
+ return;
+ }
+
+ package_count = mouse_flags_2 & 0x07;
+ index = mouse_flags_1 & 0x07;
+ write_byte(ebda_seg, 0x28 + index, in_byte);
+
+ if ( (index+1) >= package_count ) {
+BX_DEBUG_INT74("int74_function: make_farcall=1\n");
+ status = read_byte(ebda_seg, 0x0028 + 0);
+ X = read_byte(ebda_seg, 0x0028 + 1);
+ Y = read_byte(ebda_seg, 0x0028 + 2);
+ Z = 0;
+ mouse_flags_1 = 0;
+ // check if far call handler installed
+ if (mouse_flags_2 & 0x80)
+ make_farcall = 1;
+ }
+ else {
+ mouse_flags_1++;
+ }
+ write_byte(ebda_seg, 0x0026, mouse_flags_1);
+}
+
+#define SET_DISK_RET_STATUS(status) write_byte(0x0040, 0x0074, status)
+
+#if BX_USE_ATADRV
+
+ void
+int13_harddisk(DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS)
+ Bit16u DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS;
+{
+ Bit32u lba;
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit16u cylinder, head, sector;
+ Bit16u segment, offset;
+ Bit16u npc, nph, npspt, nlc, nlh, nlspt;
+ Bit16u size, count;
+ Bit8u device, status;
+
+ BX_DEBUG_INT13_HD("int13_harddisk: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", AX, BX, CX, DX, ES);
+
+ write_byte(0x0040, 0x008e, 0); // clear completion flag
+
+ // basic check : device has to be defined
+ if ( (GET_ELDL() < 0x80) || (GET_ELDL() >= 0x80 + BX_MAX_ATA_DEVICES) ) {
+ BX_INFO("int13_harddisk: function %02x, ELDL out of range %02x\n", GET_AH(), GET_ELDL());
+ goto int13_fail;
+ }
+
+ // Get the ata channel
+ device=read_byte(ebda_seg,&EbdaData->ata.hdidmap[GET_ELDL()-0x80]);
+
+ // basic check : device has to be valid
+ if (device >= BX_MAX_ATA_DEVICES) {
+ BX_INFO("int13_harddisk: function %02x, unmapped device for ELDL=%02x\n", GET_AH(), GET_ELDL());
+ goto int13_fail;
+ }
+
+ switch (GET_AH()) {
+
+ case 0x00: /* disk controller reset */
+ ata_reset (device);
+ goto int13_success;
+ break;
+
+ case 0x01: /* read disk status */
+ status = read_byte(0x0040, 0x0074);
+ SET_AH(status);
+ SET_DISK_RET_STATUS(0);
+ /* set CF if error status read */
+ if (status) goto int13_fail_nostatus;
+ else goto int13_success_noah;
+ break;
+
+ case 0x02: // read disk sectors
+ case 0x03: // write disk sectors
+ case 0x04: // verify disk sectors
+
+ count = GET_AL();
+ cylinder = GET_CH();
+ cylinder |= ( ((Bit16u) GET_CL()) << 2) & 0x300;
+ sector = (GET_CL() & 0x3f);
+ head = GET_DH();
+
+ segment = ES;
+ offset = BX;
+
+ if ( (count > 128) || (count == 0) ) {
+ BX_INFO("int13_harddisk: function %02x, count out of range!\n",GET_AH());
+ goto int13_fail;
+ }
+
+ nlc = read_word(ebda_seg, &EbdaData->ata.devices[device].lchs.cylinders);
+ nlh = read_word(ebda_seg, &EbdaData->ata.devices[device].lchs.heads);
+ nlspt = read_word(ebda_seg, &EbdaData->ata.devices[device].lchs.spt);
+
+ // sanity check on cyl heads, sec
+ if( (cylinder >= nlc) || (head >= nlh) || (sector > nlspt )) {
+ BX_INFO("int13_harddisk: function %02x, parameters out of range %04x/%04x/%04x!\n", GET_AH(), cylinder, head, sector);
+ goto int13_fail;
+ }
+
+ // FIXME verify
+ if ( GET_AH() == 0x04 ) goto int13_success;
+
+ nph = read_word(ebda_seg, &EbdaData->ata.devices[device].pchs.heads);
+ npspt = read_word(ebda_seg, &EbdaData->ata.devices[device].pchs.spt);
+
+ // if needed, translate lchs to lba, and execute command
+ if ( (nph != nlh) || (npspt != nlspt)) {
+ lba = ((((Bit32u)cylinder * (Bit32u)nlh) + (Bit32u)head) * (Bit32u)nlspt) + (Bit32u)sector - 1;
+ sector = 0; // this forces the command to be lba
+ }
+
+ if ( GET_AH() == 0x02 )
+ status=ata_cmd_data_in(device, ATA_CMD_READ_SECTORS, count, cylinder, head, sector, lba, segment, offset);
+ else
+ status=ata_cmd_data_out(device, ATA_CMD_WRITE_SECTORS, count, cylinder, head, sector, lba, segment, offset);
+
+ // Set nb of sector transferred
+ SET_AL(read_word(ebda_seg, &EbdaData->ata.trsfsectors));
+
+ if (status != 0) {
+ BX_INFO("int13_harddisk: function %02x, error %02x !\n",GET_AH(),status);
+ SET_AH(0x0c);
+ goto int13_fail_noah;
+ }
+
+ goto int13_success;
+ break;
+
+ case 0x05: /* format disk track */
+ BX_INFO("format disk track called\n");
+ goto int13_success;
+ return;
+ break;
+
+ case 0x08: /* read disk drive parameters */
+
+ // Get logical geometry from table
+ nlc = read_word(ebda_seg, &EbdaData->ata.devices[device].lchs.cylinders);
+ nlh = read_word(ebda_seg, &EbdaData->ata.devices[device].lchs.heads);
+ nlspt = read_word(ebda_seg, &EbdaData->ata.devices[device].lchs.spt);
+ count = read_byte(ebda_seg, &EbdaData->ata.hdcount);
+
+ nlc = nlc - 2; /* 0 based , last sector not used */
+ SET_AL(0);
+ SET_CH(nlc & 0xff);
+ SET_CL(((nlc >> 2) & 0xc0) | (nlspt & 0x3f));
+ SET_DH(nlh - 1);
+ SET_DL(count); /* FIXME returns 0, 1, or n hard drives */
+
+ // FIXME should set ES & DI
+
+ goto int13_success;
+ break;
+
+ case 0x10: /* check drive ready */
+ // should look at 40:8E also???
+
+ // Read the status from controller
+ status = inb(read_word(ebda_seg, &EbdaData->ata.channels[device/2].iobase1) + ATA_CB_STAT);
+ if ( (status & ( ATA_CB_STAT_BSY | ATA_CB_STAT_RDY )) == ATA_CB_STAT_RDY ) {
+ goto int13_success;
+ }
+ else {
+ SET_AH(0xAA);
+ goto int13_fail_noah;
+ }
+ break;
+
+ case 0x15: /* read disk drive size */
+
+ // Get physical geometry from table
+ npc = read_word(ebda_seg, &EbdaData->ata.devices[device].pchs.cylinders);
+ nph = read_word(ebda_seg, &EbdaData->ata.devices[device].pchs.heads);
+ npspt = read_word(ebda_seg, &EbdaData->ata.devices[device].pchs.spt);
+
+ // Compute sector count seen by int13
+ lba = (Bit32u)(npc - 1) * (Bit32u)nph * (Bit32u)npspt;
+ CX = lba >> 16;
+ DX = lba & 0xffff;
+
+ SET_AH(3); // hard disk accessible
+ goto int13_success_noah;
+ break;
+
+ case 0x41: // IBM/MS installation check
+ BX=0xaa55; // install check
+ SET_AH(0x30); // EDD 3.0
+ CX=0x0007; // ext disk access and edd, removable supported
+ goto int13_success_noah;
+ break;
+
+ case 0x42: // IBM/MS extended read
+ case 0x43: // IBM/MS extended write
+ case 0x44: // IBM/MS verify
+ case 0x47: // IBM/MS extended seek
+
+ count=read_word(DS, SI+(Bit16u)&Int13Ext->count);
+ segment=read_word(DS, SI+(Bit16u)&Int13Ext->segment);
+ offset=read_word(DS, SI+(Bit16u)&Int13Ext->offset);
+
+ // Can't use 64 bits lba
+ lba=read_dword(DS, SI+(Bit16u)&Int13Ext->lba2);
+ if (lba != 0L) {
+ BX_PANIC("int13_harddisk: function %02x. Can't use 64bits lba\n",GET_AH());
+ goto int13_fail;
+ }
+
+ // Get 32 bits lba and check
+ lba=read_dword(DS, SI+(Bit16u)&Int13Ext->lba1);
+ if (lba >= read_dword(ebda_seg, &EbdaData->ata.devices[device].sectors) ) {
+ BX_INFO("int13_harddisk: function %02x. LBA out of range\n",GET_AH());
+ goto int13_fail;
+ }
+
+ // If verify or seek
+ if (( GET_AH() == 0x44 ) || ( GET_AH() == 0x47 ))
+ goto int13_success;
+
+ // Execute the command
+ if ( GET_AH() == 0x42 )
+ status=ata_cmd_data_in(device, ATA_CMD_READ_SECTORS, count, 0, 0, 0, lba, segment, offset);
+ else
+ status=ata_cmd_data_out(device, ATA_CMD_WRITE_SECTORS, count, 0, 0, 0, lba, segment, offset);
+
+ count=read_word(ebda_seg, &EbdaData->ata.trsfsectors);
+ write_word(DS, SI+(Bit16u)&Int13Ext->count, count);
+
+ if (status != 0) {
+ BX_INFO("int13_harddisk: function %02x, error %02x !\n",GET_AH(),status);
+ SET_AH(0x0c);
+ goto int13_fail_noah;
+ }
+
+ goto int13_success;
+ break;
+
+ case 0x45: // IBM/MS lock/unlock drive
+ case 0x49: // IBM/MS extended media change
+ goto int13_success; // Always success for HD
+ break;
+
+ case 0x46: // IBM/MS eject media
+ SET_AH(0xb2); // Volume Not Removable
+ goto int13_fail_noah; // Always fail for HD
+ break;
+
+ case 0x48: // IBM/MS get drive parameters
+ size=read_word(DS,SI+(Bit16u)&Int13DPT->size);
+
+ // Buffer is too small
+ if(size < 0x1a)
+ goto int13_fail;
+
+ // EDD 1.x
+ if(size >= 0x1a) {
+ Bit16u blksize;
+
+ npc = read_word(ebda_seg, &EbdaData->ata.devices[device].pchs.cylinders);
+ nph = read_word(ebda_seg, &EbdaData->ata.devices[device].pchs.heads);
+ npspt = read_word(ebda_seg, &EbdaData->ata.devices[device].pchs.spt);
+ lba = read_dword(ebda_seg, &EbdaData->ata.devices[device].sectors);
+ blksize = read_word(ebda_seg, &EbdaData->ata.devices[device].blksize);
+
+ write_word(DS, SI+(Bit16u)&Int13DPT->size, 0x1a);
+ write_word(DS, SI+(Bit16u)&Int13DPT->infos, 0x02); // geometry is valid
+ write_dword(DS, SI+(Bit16u)&Int13DPT->cylinders, (Bit32u)npc);
+ write_dword(DS, SI+(Bit16u)&Int13DPT->heads, (Bit32u)nph);
+ write_dword(DS, SI+(Bit16u)&Int13DPT->spt, (Bit32u)npspt);
+ write_dword(DS, SI+(Bit16u)&Int13DPT->sector_count1, lba); // FIXME should be Bit64
+ write_dword(DS, SI+(Bit16u)&Int13DPT->sector_count2, 0L);
+ write_word(DS, SI+(Bit16u)&Int13DPT->blksize, blksize);
+ }
+
+ // EDD 2.x
+ if(size >= 0x1e) {
+ Bit8u channel, dev, irq, mode, checksum, i, translation;
+ Bit16u iobase1, iobase2, options;
+
+ write_word(DS, SI+(Bit16u)&Int13DPT->size, 0x1e);
+
+ write_word(DS, SI+(Bit16u)&Int13DPT->dpte_segment, ebda_seg);
+ write_word(DS, SI+(Bit16u)&Int13DPT->dpte_offset, &EbdaData->ata.dpte);
+
+ // Fill in dpte
+ channel = device / 2;
+ iobase1 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase1);
+ iobase2 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase2);
+ irq = read_byte(ebda_seg, &EbdaData->ata.channels[channel].irq);
+ mode = read_byte(ebda_seg, &EbdaData->ata.devices[device].mode);
+ translation = read_byte(ebda_seg, &EbdaData->ata.devices[device].translation);
+
+ options = (translation==ATA_TRANSLATION_NONE?0:1<<3); // chs translation
+ options |= (1<<4); // lba translation
+ options |= (mode==ATA_MODE_PIO32?1:0<<7);
+ options |= (translation==ATA_TRANSLATION_LBA?1:0<<9);
+ options |= (translation==ATA_TRANSLATION_RECHS?3:0<<9);
+
+ write_word(ebda_seg, &EbdaData->ata.dpte.iobase1, iobase1);
+ write_word(ebda_seg, &EbdaData->ata.dpte.iobase2, iobase2);
+ write_byte(ebda_seg, &EbdaData->ata.dpte.prefix, (0xe | (device % 2))<<4 );
+ write_byte(ebda_seg, &EbdaData->ata.dpte.unused, 0xcb );
+ write_byte(ebda_seg, &EbdaData->ata.dpte.irq, irq );
+ write_byte(ebda_seg, &EbdaData->ata.dpte.blkcount, 1 );
+ write_byte(ebda_seg, &EbdaData->ata.dpte.dma, 0 );
+ write_byte(ebda_seg, &EbdaData->ata.dpte.pio, 0 );
+ write_word(ebda_seg, &EbdaData->ata.dpte.options, options);
+ write_word(ebda_seg, &EbdaData->ata.dpte.reserved, 0);
+ write_byte(ebda_seg, &EbdaData->ata.dpte.revision, 0x11);
+
+ checksum=0;
+ for (i=0; i<15; i++) checksum+=read_byte(ebda_seg, (&EbdaData->ata.dpte) + i);
+ checksum = ~checksum;
+ write_byte(ebda_seg, &EbdaData->ata.dpte.checksum, checksum);
+ }
+
+ // EDD 3.x
+ if(size >= 0x42) {
+ Bit8u channel, iface, checksum, i;
+ Bit16u iobase1;
+
+ channel = device / 2;
+ iface = read_byte(ebda_seg, &EbdaData->ata.channels[channel].iface);
+ iobase1 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase1);
+
+ write_word(DS, SI+(Bit16u)&Int13DPT->size, 0x42);
+ write_word(DS, SI+(Bit16u)&Int13DPT->key, 0xbedd);
+ write_byte(DS, SI+(Bit16u)&Int13DPT->dpi_length, 0x24);
+ write_byte(DS, SI+(Bit16u)&Int13DPT->reserved1, 0);
+ write_word(DS, SI+(Bit16u)&Int13DPT->reserved2, 0);
+
+ if (iface==ATA_IFACE_ISA) {
+ write_byte(DS, SI+(Bit16u)&Int13DPT->host_bus[0], 'I');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->host_bus[1], 'S');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->host_bus[2], 'A');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->host_bus[3], 0);
+ }
+ else {
+ // FIXME PCI
+ }
+ write_byte(DS, SI+(Bit16u)&Int13DPT->iface_type[0], 'A');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->iface_type[1], 'T');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->iface_type[2], 'A');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->iface_type[3], 0);
+
+ if (iface==ATA_IFACE_ISA) {
+ write_word(DS, SI+(Bit16u)&Int13DPT->iface_path[0], iobase1);
+ write_word(DS, SI+(Bit16u)&Int13DPT->iface_path[2], 0);
+ write_dword(DS, SI+(Bit16u)&Int13DPT->iface_path[4], 0L);
+ }
+ else {
+ // FIXME PCI
+ }
+ write_byte(DS, SI+(Bit16u)&Int13DPT->device_path[0], device%2);
+ write_byte(DS, SI+(Bit16u)&Int13DPT->device_path[1], 0);
+ write_word(DS, SI+(Bit16u)&Int13DPT->device_path[2], 0);
+ write_dword(DS, SI+(Bit16u)&Int13DPT->device_path[4], 0L);
+
+ checksum=0;
+ for (i=30; i<64; i++) checksum+=read_byte(DS, SI + i);
+ checksum = ~checksum;
+ write_byte(DS, SI+(Bit16u)&Int13DPT->checksum, checksum);
+ }
+
+ goto int13_success;
+ break;
+
+ case 0x4e: // // IBM/MS set hardware configuration
+ // DMA, prefetch, PIO maximum not supported
+ switch (GET_AL()) {
+ case 0x01:
+ case 0x03:
+ case 0x04:
+ case 0x06:
+ goto int13_success;
+ break;
+ default :
+ goto int13_fail;
+ }
+ break;
+
+ case 0x09: /* initialize drive parameters */
+ case 0x0c: /* seek to specified cylinder */
+ case 0x0d: /* alternate disk reset */
+ case 0x11: /* recalibrate */
+ case 0x14: /* controller internal diagnostic */
+ BX_INFO("int13h_harddisk function %02xh unimplemented, returns success\n", GET_AH());
+ goto int13_success;
+ break;
+
+ case 0x0a: /* read disk sectors with ECC */
+ case 0x0b: /* write disk sectors with ECC */
+ case 0x18: // set media type for format
+ case 0x50: // IBM/MS send packet command
+ default:
+ BX_INFO("int13_harddisk function %02xh unsupported, returns fail\n", GET_AH());
+ goto int13_fail;
+ break;
+ }
+
+int13_fail:
+ SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
+int13_fail_noah:
+ SET_DISK_RET_STATUS(GET_AH());
+int13_fail_nostatus:
+ SET_CF(); // error occurred
+ return;
+
+int13_success:
+ SET_AH(0x00); // no error
+int13_success_noah:
+ SET_DISK_RET_STATUS(0x00);
+ CLEAR_CF(); // no error
+ return;
+}
+
+// ---------------------------------------------------------------------------
+// Start of int13 for cdrom
+// ---------------------------------------------------------------------------
+
+ void
+int13_cdrom(EHBX, DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS)
+ Bit16u EHBX, DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit8u device, status, locks;
+ Bit8u atacmd[12];
+ Bit32u lba;
+ Bit16u count, segment, offset, i, size;
+
+ BX_DEBUG_INT13_CD("int13_cdrom: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", AX, BX, CX, DX, ES);
+
+ SET_DISK_RET_STATUS(0x00);
+
+ /* basic check : device should be 0xE0+ */
+ if( (GET_ELDL() < 0xE0) || (GET_ELDL() >= 0xE0+BX_MAX_ATA_DEVICES) ) {
+ BX_INFO("int13_cdrom: function %02x, ELDL out of range %02x\n", GET_AH(), GET_ELDL());
+ goto int13_fail;
+ }
+
+ // Get the ata channel
+ device=read_byte(ebda_seg,&EbdaData->ata.cdidmap[GET_ELDL()-0xE0]);
+
+ /* basic check : device has to be valid */
+ if (device >= BX_MAX_ATA_DEVICES) {
+ BX_INFO("int13_cdrom: function %02x, unmapped device for ELDL=%02x\n", GET_AH(), GET_ELDL());
+ goto int13_fail;
+ }
+
+ switch (GET_AH()) {
+
+ // all those functions return SUCCESS
+ case 0x00: /* disk controller reset */
+ case 0x09: /* initialize drive parameters */
+ case 0x0c: /* seek to specified cylinder */
+ case 0x0d: /* alternate disk reset */
+ case 0x10: /* check drive ready */
+ case 0x11: /* recalibrate */
+ case 0x14: /* controller internal diagnostic */
+ case 0x16: /* detect disk change */
+ goto int13_success;
+ break;
+
+ // all those functions return disk write-protected
+ case 0x03: /* write disk sectors */
+ case 0x05: /* format disk track */
+ case 0x43: // IBM/MS extended write
+ SET_AH(0x03);
+ goto int13_fail_noah;
+ break;
+
+ case 0x01: /* read disk status */
+ status = read_byte(0x0040, 0x0074);
+ SET_AH(status);
+ SET_DISK_RET_STATUS(0);
+
+ /* set CF if error status read */
+ if (status) goto int13_fail_nostatus;
+ else goto int13_success_noah;
+ break;
+
+ case 0x15: /* read disk drive size */
+ SET_AH(0x02);
+ goto int13_fail_noah;
+ break;
+
+ case 0x41: // IBM/MS installation check
+ BX=0xaa55; // install check
+ SET_AH(0x30); // EDD 2.1
+ CX=0x0007; // ext disk access, removable and edd
+ goto int13_success_noah;
+ break;
+
+ case 0x42: // IBM/MS extended read
+ case 0x44: // IBM/MS verify sectors
+ case 0x47: // IBM/MS extended seek
+
+ count=read_word(DS, SI+(Bit16u)&Int13Ext->count);
+ segment=read_word(DS, SI+(Bit16u)&Int13Ext->segment);
+ offset=read_word(DS, SI+(Bit16u)&Int13Ext->offset);
+
+ // Can't use 64 bits lba
+ lba=read_dword(DS, SI+(Bit16u)&Int13Ext->lba2);
+ if (lba != 0L) {
+ BX_PANIC("int13_cdrom: function %02x. Can't use 64bits lba\n",GET_AH());
+ goto int13_fail;
+ }
+
+ // Get 32 bits lba
+ lba=read_dword(DS, SI+(Bit16u)&Int13Ext->lba1);
+
+ // If verify or seek
+ if (( GET_AH() == 0x44 ) || ( GET_AH() == 0x47 ))
+ goto int13_success;
+
+ memsetb(get_SS(),atacmd,0,12);
+ atacmd[0]=0x28; // READ command
+ atacmd[7]=(count & 0xff00) >> 8; // Sectors
+ atacmd[8]=(count & 0x00ff); // Sectors
+ atacmd[2]=(lba & 0xff000000) >> 24; // LBA
+ atacmd[3]=(lba & 0x00ff0000) >> 16;
+ atacmd[4]=(lba & 0x0000ff00) >> 8;
+ atacmd[5]=(lba & 0x000000ff);
+ status = ata_cmd_packet(device, 12, get_SS(), atacmd, 0, count*2048L, ATA_DATA_IN, segment,offset);
+
+ count = (Bit16u)(read_dword(ebda_seg, &EbdaData->ata.trsfbytes) >> 11);
+ write_word(DS, SI+(Bit16u)&Int13Ext->count, count);
+
+ if (status != 0) {
+ BX_INFO("int13_cdrom: function %02x, status %02x !\n",GET_AH(),status);
+ SET_AH(0x0c);
+ goto int13_fail_noah;
+ }
+
+ goto int13_success;
+ break;
+
+ case 0x45: // IBM/MS lock/unlock drive
+ if (GET_AL() > 2) goto int13_fail;
+
+ locks = read_byte(ebda_seg, &EbdaData->ata.devices[device].lock);
+
+ switch (GET_AL()) {
+ case 0 : // lock
+ if (locks == 0xff) {
+ SET_AH(0xb4);
+ SET_AL(1);
+ goto int13_fail_noah;
+ }
+ write_byte(ebda_seg, &EbdaData->ata.devices[device].lock, ++locks);
+ SET_AL(1);
+ break;
+ case 1 : // unlock
+ if (locks == 0x00) {
+ SET_AH(0xb0);
+ SET_AL(0);
+ goto int13_fail_noah;
+ }
+ write_byte(ebda_seg, &EbdaData->ata.devices[device].lock, --locks);
+ SET_AL(locks==0?0:1);
+ break;
+ case 2 : // status
+ SET_AL(locks==0?0:1);
+ break;
+ }
+ goto int13_success;
+ break;
+
+ case 0x46: // IBM/MS eject media
+ locks = read_byte(ebda_seg, &EbdaData->ata.devices[device].lock);
+
+ if (locks != 0) {
+ SET_AH(0xb1); // media locked
+ goto int13_fail_noah;
+ }
+ // FIXME should handle 0x31 no media in device
+ // FIXME should handle 0xb5 valid request failed
+
+ // Call removable media eject
+ ASM_START
+ push bp
+ mov bp, sp
+
+ mov ah, #0x52
+ int 15
+ mov _int13_cdrom.status + 2[bp], ah
+ jnc int13_cdrom_rme_end
+ mov _int13_cdrom.status, #1
+int13_cdrom_rme_end:
+ pop bp
+ ASM_END
+
+ if (status != 0) {
+ SET_AH(0xb1); // media locked
+ goto int13_fail_noah;
+ }
+
+ goto int13_success;
+ break;
+
+ case 0x48: // IBM/MS get drive parameters
+ size = read_word(DS,SI+(Bit16u)&Int13Ext->size);
+
+ // Buffer is too small
+ if(size < 0x1a)
+ goto int13_fail;
+
+ // EDD 1.x
+ if(size >= 0x1a) {
+ Bit16u cylinders, heads, spt, blksize;
+
+ blksize = read_word(ebda_seg, &EbdaData->ata.devices[device].blksize);
+
+ write_word(DS, SI+(Bit16u)&Int13DPT->size, 0x1a);
+ write_word(DS, SI+(Bit16u)&Int13DPT->infos, 0x74); // removable, media change, lockable, max values
+ write_dword(DS, SI+(Bit16u)&Int13DPT->cylinders, 0xffffffff);
+ write_dword(DS, SI+(Bit16u)&Int13DPT->heads, 0xffffffff);
+ write_dword(DS, SI+(Bit16u)&Int13DPT->spt, 0xffffffff);
+ write_dword(DS, SI+(Bit16u)&Int13DPT->sector_count1, 0xffffffff); // FIXME should be Bit64
+ write_dword(DS, SI+(Bit16u)&Int13DPT->sector_count2, 0xffffffff);
+ write_word(DS, SI+(Bit16u)&Int13DPT->blksize, blksize);
+ }
+
+ // EDD 2.x
+ if(size >= 0x1e) {
+ Bit8u channel, dev, irq, mode, checksum, i;
+ Bit16u iobase1, iobase2, options;
+
+ write_word(DS, SI+(Bit16u)&Int13DPT->size, 0x1e);
+
+ write_word(DS, SI+(Bit16u)&Int13DPT->dpte_segment, ebda_seg);
+ write_word(DS, SI+(Bit16u)&Int13DPT->dpte_offset, &EbdaData->ata.dpte);
+
+ // Fill in dpte
+ channel = device / 2;
+ iobase1 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase1);
+ iobase2 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase2);
+ irq = read_byte(ebda_seg, &EbdaData->ata.channels[channel].irq);
+ mode = read_byte(ebda_seg, &EbdaData->ata.devices[device].mode);
+
+ // FIXME atapi device
+ options = (1<<4); // lba translation
+ options |= (1<<5); // removable device
+ options |= (1<<6); // atapi device
+ options |= (mode==ATA_MODE_PIO32?1:0<<7);
+
+ write_word(ebda_seg, &EbdaData->ata.dpte.iobase1, iobase1);
+ write_word(ebda_seg, &EbdaData->ata.dpte.iobase2, iobase2);
+ write_byte(ebda_seg, &EbdaData->ata.dpte.prefix, (0xe | (device % 2))<<4 );
+ write_byte(ebda_seg, &EbdaData->ata.dpte.unused, 0xcb );
+ write_byte(ebda_seg, &EbdaData->ata.dpte.irq, irq );
+ write_byte(ebda_seg, &EbdaData->ata.dpte.blkcount, 1 );
+ write_byte(ebda_seg, &EbdaData->ata.dpte.dma, 0 );
+ write_byte(ebda_seg, &EbdaData->ata.dpte.pio, 0 );
+ write_word(ebda_seg, &EbdaData->ata.dpte.options, options);
+ write_word(ebda_seg, &EbdaData->ata.dpte.reserved, 0);
+ write_byte(ebda_seg, &EbdaData->ata.dpte.revision, 0x11);
+
+ checksum=0;
+ for (i=0; i<15; i++) checksum+=read_byte(ebda_seg, (&EbdaData->ata.dpte) + i);
+ checksum = ~checksum;
+ write_byte(ebda_seg, &EbdaData->ata.dpte.checksum, checksum);
+ }
+
+ // EDD 3.x
+ if(size >= 0x42) {
+ Bit8u channel, iface, checksum, i;
+ Bit16u iobase1;
+
+ channel = device / 2;
+ iface = read_byte(ebda_seg, &EbdaData->ata.channels[channel].iface);
+ iobase1 = read_word(ebda_seg, &EbdaData->ata.channels[channel].iobase1);
+
+ write_word(DS, SI+(Bit16u)&Int13DPT->size, 0x42);
+ write_word(DS, SI+(Bit16u)&Int13DPT->key, 0xbedd);
+ write_byte(DS, SI+(Bit16u)&Int13DPT->dpi_length, 0x24);
+ write_byte(DS, SI+(Bit16u)&Int13DPT->reserved1, 0);
+ write_word(DS, SI+(Bit16u)&Int13DPT->reserved2, 0);
+
+ if (iface==ATA_IFACE_ISA) {
+ write_byte(DS, SI+(Bit16u)&Int13DPT->host_bus[0], 'I');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->host_bus[1], 'S');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->host_bus[2], 'A');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->host_bus[3], 0);
+ }
+ else {
+ // FIXME PCI
+ }
+ write_byte(DS, SI+(Bit16u)&Int13DPT->iface_type[0], 'A');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->iface_type[1], 'T');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->iface_type[2], 'A');
+ write_byte(DS, SI+(Bit16u)&Int13DPT->iface_type[3], 0);
+
+ if (iface==ATA_IFACE_ISA) {
+ write_word(DS, SI+(Bit16u)&Int13DPT->iface_path[0], iobase1);
+ write_word(DS, SI+(Bit16u)&Int13DPT->iface_path[2], 0);
+ write_dword(DS, SI+(Bit16u)&Int13DPT->iface_path[4], 0L);
+ }
+ else {
+ // FIXME PCI
+ }
+ write_byte(DS, SI+(Bit16u)&Int13DPT->device_path[0], device%2);
+ write_byte(DS, SI+(Bit16u)&Int13DPT->device_path[1], 0);
+ write_word(DS, SI+(Bit16u)&Int13DPT->device_path[2], 0);
+ write_dword(DS, SI+(Bit16u)&Int13DPT->device_path[4], 0L);
+
+ checksum=0;
+ for (i=30; i<64; i++) checksum+=read_byte(DS, SI + i);
+ checksum = ~checksum;
+ write_byte(DS, SI+(Bit16u)&Int13DPT->checksum, checksum);
+ }
+
+ goto int13_success;
+ break;
+
+ case 0x49: // IBM/MS extended media change
+ // always send changed ??
+ SET_AH(06);
+ goto int13_fail_nostatus;
+ break;
+
+ case 0x4e: // // IBM/MS set hardware configuration
+ // DMA, prefetch, PIO maximum not supported
+ switch (GET_AL()) {
+ case 0x01:
+ case 0x03:
+ case 0x04:
+ case 0x06:
+ goto int13_success;
+ break;
+ default :
+ goto int13_fail;
+ }
+ break;
+
+ // all those functions return unimplemented
+ case 0x02: /* read sectors */
+ case 0x04: /* verify sectors */
+ case 0x08: /* read disk drive parameters */
+ case 0x0a: /* read disk sectors with ECC */
+ case 0x0b: /* write disk sectors with ECC */
+ case 0x18: /* set media type for format */
+ case 0x50: // ? - send packet command
+ default:
+ BX_INFO("int13_cdrom: unsupported AH=%02x\n", GET_AH());
+ goto int13_fail;
+ break;
+ }
+
+int13_fail:
+ SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
+int13_fail_noah:
+ SET_DISK_RET_STATUS(GET_AH());
+int13_fail_nostatus:
+ SET_CF(); // error occurred
+ return;
+
+int13_success:
+ SET_AH(0x00); // no error
+int13_success_noah:
+ SET_DISK_RET_STATUS(0x00);
+ CLEAR_CF(); // no error
+ return;
+}
+
+// ---------------------------------------------------------------------------
+// End of int13 for cdrom
+// ---------------------------------------------------------------------------
+
+#if BX_ELTORITO_BOOT
+// ---------------------------------------------------------------------------
+// Start of int13 for eltorito functions
+// ---------------------------------------------------------------------------
+
+ void
+int13_eltorito(DS, ES, DI, SI, BP, SP, BX, DX, CX, AX, IP, CS, FLAGS)
+ Bit16u DS, ES, DI, SI, BP, SP, BX, DX, CX, AX, IP, CS, FLAGS;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+
+ BX_DEBUG_INT13_ET("int13_eltorito: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", AX, BX, CX, DX, ES);
+ // BX_DEBUG_INT13_ET("int13_eltorito: SS=%04x DS=%04x ES=%04x DI=%04x SI=%04x\n",get_SS(), DS, ES, DI, SI);
+
+ switch (GET_AH()) {
+
+ // FIXME ElTorito Various. Should be implemented
+ case 0x4a: // ElTorito - Initiate disk emu
+ case 0x4c: // ElTorito - Initiate disk emu and boot
+ case 0x4d: // ElTorito - Return Boot catalog
+ BX_PANIC("Int13 eltorito call with AX=%04x. Please report\n",AX);
+ goto int13_fail;
+ break;
+
+ case 0x4b: // ElTorito - Terminate disk emu
+ // FIXME ElTorito Hardcoded
+ write_byte(DS,SI+0x00,0x13);
+ write_byte(DS,SI+0x01,read_byte(ebda_seg,&EbdaData->cdemu.media));
+ write_byte(DS,SI+0x02,read_byte(ebda_seg,&EbdaData->cdemu.emulated_drive));
+ write_byte(DS,SI+0x03,read_byte(ebda_seg,&EbdaData->cdemu.controller_index));
+ write_dword(DS,SI+0x04,read_dword(ebda_seg,&EbdaData->cdemu.ilba));
+ write_word(DS,SI+0x08,read_word(ebda_seg,&EbdaData->cdemu.device_spec));
+ write_word(DS,SI+0x0a,read_word(ebda_seg,&EbdaData->cdemu.buffer_segment));
+ write_word(DS,SI+0x0c,read_word(ebda_seg,&EbdaData->cdemu.load_segment));
+ write_word(DS,SI+0x0e,read_word(ebda_seg,&EbdaData->cdemu.sector_count));
+ write_byte(DS,SI+0x10,read_byte(ebda_seg,&EbdaData->cdemu.vdevice.cylinders));
+ write_byte(DS,SI+0x11,read_byte(ebda_seg,&EbdaData->cdemu.vdevice.spt));
+ write_byte(DS,SI+0x12,read_byte(ebda_seg,&EbdaData->cdemu.vdevice.heads));
+
+ // If we have to terminate emulation
+ if(GET_AL() == 0x00) {
+ // FIXME ElTorito Various. Should be handled accordingly to spec
+ write_byte(ebda_seg,&EbdaData->cdemu.active, 0x00); // bye bye
+ }
+
+ goto int13_success;
+ break;
+
+ default:
+ BX_INFO("int13_eltorito: unsupported AH=%02x\n", GET_AH());
+ goto int13_fail;
+ break;
+ }
+
+int13_fail:
+ SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
+ SET_DISK_RET_STATUS(GET_AH());
+ SET_CF(); // error occurred
+ return;
+
+int13_success:
+ SET_AH(0x00); // no error
+ SET_DISK_RET_STATUS(0x00);
+ CLEAR_CF(); // no error
+ return;
+}
+
+// ---------------------------------------------------------------------------
+// End of int13 for eltorito functions
+// ---------------------------------------------------------------------------
+
+// ---------------------------------------------------------------------------
+// Start of int13 when emulating a device from the cd
+// ---------------------------------------------------------------------------
+
+ void
+int13_cdemu(DS, ES, DI, SI, BP, SP, BX, DX, CX, AX, IP, CS, FLAGS)
+ Bit16u DS, ES, DI, SI, BP, SP, BX, DX, CX, AX, IP, CS, FLAGS;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit8u device, status;
+ Bit16u vheads, vspt, vcylinders;
+ Bit16u head, sector, cylinder, nbsectors;
+ Bit32u vlba, ilba, slba, elba;
+ Bit16u before, segment, offset;
+ Bit8u atacmd[12];
+
+ BX_DEBUG_INT13_ET("int13_cdemu: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", AX, BX, CX, DX, ES);
+
+ /* at this point, we are emulating a floppy/harddisk */
+
+ // Recompute the device number
+ device = read_byte(ebda_seg,&EbdaData->cdemu.controller_index) * 2;
+ device += read_byte(ebda_seg,&EbdaData->cdemu.device_spec);
+
+ SET_DISK_RET_STATUS(0x00);
+
+ /* basic checks : emulation should be active, dl should equal the emulated drive */
+ if( (read_byte(ebda_seg,&EbdaData->cdemu.active) ==0 )
+ || (read_byte(ebda_seg,&EbdaData->cdemu.emulated_drive ) != GET_DL())) {
+ BX_INFO("int13_cdemu: function %02x, emulation not active for DL= %02x\n", GET_AH(), GET_DL());
+ goto int13_fail;
+ }
+
+ switch (GET_AH()) {
+
+ // all those functions return SUCCESS
+ case 0x00: /* disk controller reset */
+ case 0x09: /* initialize drive parameters */
+ case 0x0c: /* seek to specified cylinder */
+ case 0x0d: /* alternate disk reset */ // FIXME ElTorito Various. should really reset ?
+ case 0x10: /* check drive ready */ // FIXME ElTorito Various. should check if ready ?
+ case 0x11: /* recalibrate */
+ case 0x14: /* controller internal diagnostic */
+ case 0x16: /* detect disk change */
+ goto int13_success;
+ break;
+
+ // all those functions return disk write-protected
+ case 0x03: /* write disk sectors */
+ case 0x05: /* format disk track */
+ SET_AH(0x03);
+ goto int13_fail_noah;
+ break;
+
+ case 0x01: /* read disk status */
+ status=read_byte(0x0040, 0x0074);
+ SET_AH(status);
+ SET_DISK_RET_STATUS(0);
+
+ /* set CF if error status read */
+ if (status) goto int13_fail_nostatus;
+ else goto int13_success_noah;
+ break;
+
+ case 0x02: // read disk sectors
+ case 0x04: // verify disk sectors
+ vspt = read_word(ebda_seg,&EbdaData->cdemu.vdevice.spt);
+ vcylinders = read_word(ebda_seg,&EbdaData->cdemu.vdevice.cylinders);
+ vheads = read_word(ebda_seg,&EbdaData->cdemu.vdevice.heads);
+
+ ilba = read_dword(ebda_seg,&EbdaData->cdemu.ilba);
+
+ sector = GET_CL() & 0x003f;
+ cylinder = (GET_CL() & 0x00c0) << 2 | GET_CH();
+ head = GET_DH();
+ nbsectors = GET_AL();
+ segment = ES;
+ offset = BX;
+
+ // no sector to read ?
+ if(nbsectors==0) goto int13_success;
+
+ // sanity checks sco openserver needs this!
+ if ((sector > vspt)
+ || (cylinder >= vcylinders)
+ || (head >= vheads)) {
+ goto int13_fail;
+ }
+
+ // After controls, verify do nothing
+ if (GET_AH() == 0x04) goto int13_success;
+
+ segment = ES+(BX / 16);
+ offset = BX % 16;
+
+ // calculate the virtual lba inside the image
+ vlba=((((Bit32u)cylinder*(Bit32u)vheads)+(Bit32u)head)*(Bit32u)vspt)+((Bit32u)(sector-1));
+
+ // In advance so we don't loose the count
+ SET_AL(nbsectors);
+
+ // start lba on cd
+ slba = (Bit32u)vlba/4;
+ before= (Bit16u)vlba%4;
+
+ // end lba on cd
+ elba = (Bit32u)(vlba+nbsectors-1)/4;
+
+ memsetb(get_SS(),atacmd,0,12);
+ atacmd[0]=0x28; // READ command
+ atacmd[7]=((Bit16u)(elba-slba+1) & 0xff00) >> 8; // Sectors
+ atacmd[8]=((Bit16u)(elba-slba+1) & 0x00ff); // Sectors
+ atacmd[2]=(ilba+slba & 0xff000000) >> 24; // LBA
+ atacmd[3]=(ilba+slba & 0x00ff0000) >> 16;
+ atacmd[4]=(ilba+slba & 0x0000ff00) >> 8;
+ atacmd[5]=(ilba+slba & 0x000000ff);
+ if((status = ata_cmd_packet(device, 12, get_SS(), atacmd, before*512, nbsectors*512L, ATA_DATA_IN, segment,offset)) != 0) {
+ BX_INFO("int13_cdemu: function %02x, error %02x !\n",GET_AH(),status);
+ SET_AH(0x02);
+ SET_AL(0);
+ goto int13_fail_noah;
+ }
+
+ goto int13_success;
+ break;
+
+ case 0x08: /* read disk drive parameters */
+ vspt=read_word(ebda_seg,&EbdaData->cdemu.vdevice.spt);
+ vcylinders=read_word(ebda_seg,&EbdaData->cdemu.vdevice.cylinders) - 1;
+ vheads=read_word(ebda_seg,&EbdaData->cdemu.vdevice.heads) - 1;
+
+ SET_AL( 0x00 );
+ SET_BL( 0x00 );
+ SET_CH( vcylinders & 0xff );
+ SET_CL((( vcylinders >> 2) & 0xc0) | ( vspt & 0x3f ));
+ SET_DH( vheads );
+ SET_DL( 0x02 ); // FIXME ElTorito Various. should send the real count of drives 1 or 2
+ // FIXME ElTorito Harddisk. should send the HD count
+
+ switch(read_byte(ebda_seg,&EbdaData->cdemu.media)) {
+ case 0x01: SET_BL( 0x02 ); break;
+ case 0x02: SET_BL( 0x04 ); break;
+ case 0x03: SET_BL( 0x06 ); break;
+ }
+
+ASM_START
+ push bp
+ mov bp, sp
+ mov ax, #diskette_param_table2
+ mov _int13_cdemu.DI+2[bp], ax
+ mov _int13_cdemu.ES+2[bp], cs
+ pop bp
+ASM_END
+ goto int13_success;
+ break;
+
+ case 0x15: /* read disk drive size */
+ // FIXME ElTorito Harddisk. What geometry to send ?
+ SET_AH(0x03);
+ goto int13_success_noah;
+ break;
+
+ // all those functions return unimplemented
+ case 0x0a: /* read disk sectors with ECC */
+ case 0x0b: /* write disk sectors with ECC */
+ case 0x18: /* set media type for format */
+ case 0x41: // IBM/MS installation check
+ // FIXME ElTorito Harddisk. Darwin would like to use EDD
+ case 0x42: // IBM/MS extended read
+ case 0x43: // IBM/MS extended write
+ case 0x44: // IBM/MS verify sectors
+ case 0x45: // IBM/MS lock/unlock drive
+ case 0x46: // IBM/MS eject media
+ case 0x47: // IBM/MS extended seek
+ case 0x48: // IBM/MS get drive parameters
+ case 0x49: // IBM/MS extended media change
+ case 0x4e: // ? - set hardware configuration
+ case 0x50: // ? - send packet command
+ default:
+ BX_INFO("int13_cdemu function AH=%02x unsupported, returns fail\n", GET_AH());
+ goto int13_fail;
+ break;
+ }
+
+int13_fail:
+ SET_AH(0x01); // defaults to invalid function in AH or invalid parameter
+int13_fail_noah:
+ SET_DISK_RET_STATUS(GET_AH());
+int13_fail_nostatus:
+ SET_CF(); // error occurred
+ return;
+
+int13_success:
+ SET_AH(0x00); // no error
+int13_success_noah:
+ SET_DISK_RET_STATUS(0x00);
+ CLEAR_CF(); // no error
+ return;
+}
+
+// ---------------------------------------------------------------------------
+// End of int13 when emulating a device from the cd
+// ---------------------------------------------------------------------------
+
+#endif // BX_ELTORITO_BOOT
+
+#else //BX_USE_ATADRV
+
+ void
+outLBA(cylinder,hd_heads,head,hd_sectors,sector,dl)
+ Bit16u cylinder;
+ Bit16u hd_heads;
+ Bit16u head;
+ Bit16u hd_sectors;
+ Bit16u sector;
+ Bit16u dl;
+{
+ASM_START
+ push bp
+ mov bp, sp
+ push eax
+ push ebx
+ push edx
+ xor eax,eax
+ mov ax,4[bp] // cylinder
+ xor ebx,ebx
+ mov bl,6[bp] // hd_heads
+ imul ebx
+
+ mov bl,8[bp] // head
+ add eax,ebx
+ mov bl,10[bp] // hd_sectors
+ imul ebx
+ mov bl,12[bp] // sector
+ add eax,ebx
+
+ dec eax
+ mov dx,#0x1f3
+ out dx,al
+ mov dx,#0x1f4
+ mov al,ah
+ out dx,al
+ shr eax,#16
+ mov dx,#0x1f5
+ out dx,al
+ and ah,#0xf
+ mov bl,14[bp] // dl
+ and bl,#1
+ shl bl,#4
+ or ah,bl
+ or ah,#0xe0
+ mov al,ah
+ mov dx,#0x01f6
+ out dx,al
+ pop edx
+ pop ebx
+ pop eax
+ pop bp
+ASM_END
+}
+
+ void
+int13_harddisk(DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS)
+ Bit16u DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS;
+{
+ Bit8u drive, num_sectors, sector, head, status, mod;
+ Bit8u drive_map;
+ Bit8u n_drives;
+ Bit16u cyl_mod, ax;
+ Bit16u max_cylinder, cylinder, total_sectors;
+ Bit16u hd_cylinders;
+ Bit8u hd_heads, hd_sectors;
+ Bit16u val16;
+ Bit8u sector_count;
+ unsigned int i;
+ Bit16u tempbx;
+ Bit16u dpsize;
+
+ Bit16u count, segment, offset;
+ Bit32u lba;
+ Bit16u error;
+
+ BX_DEBUG_INT13_HD("int13 harddisk: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", AX, BX, CX, DX, ES);
+
+ write_byte(0x0040, 0x008e, 0); // clear completion flag
+
+ /* at this point, DL is >= 0x80 to be passed from the floppy int13h
+ handler code */
+ /* check how many disks first (cmos reg 0x12), return an error if
+ drive not present */
+ drive_map = inb_cmos(0x12);
+ drive_map = (((drive_map & 0xf0)==0) ? 0 : 1) |
+ (((drive_map & 0x0f)==0) ? 0 : 2);
+ n_drives = (drive_map==0) ? 0 :
+ ((drive_map==3) ? 2 : 1);
+
+ if (!(drive_map & (1<<(GET_ELDL()&0x7f)))) { /* allow 0, 1, or 2 disks */
+ SET_AH(0x01);
+ SET_DISK_RET_STATUS(0x01);
+ SET_CF(); /* error occurred */
+ return;
+ }
+
+ switch (GET_AH()) {
+
+ case 0x00: /* disk controller reset */
+BX_DEBUG_INT13_HD("int13_f00\n");
+
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ set_diskette_ret_status(0);
+ set_diskette_current_cyl(0, 0); /* current cylinder, diskette 1 */
+ set_diskette_current_cyl(1, 0); /* current cylinder, diskette 2 */
+ CLEAR_CF(); /* successful */
+ return;
+ break;
+
+ case 0x01: /* read disk status */
+BX_DEBUG_INT13_HD("int13_f01\n");
+ status = read_byte(0x0040, 0x0074);
+ SET_AH(status);
+ SET_DISK_RET_STATUS(0);
+ /* set CF if error status read */
+ if (status) SET_CF();
+ else CLEAR_CF();
+ return;
+ break;
+
+ case 0x04: // verify disk sectors
+ case 0x02: // read disk sectors
+ drive = GET_ELDL();
+ get_hd_geometry(drive, &hd_cylinders, &hd_heads, &hd_sectors);
+
+ num_sectors = GET_AL();
+ cylinder = (GET_CL() & 0x00c0) << 2 | GET_CH();
+ sector = (GET_CL() & 0x3f);
+ head = GET_DH();
+
+
+ if (hd_cylinders > 1024) {
+ if (hd_cylinders <= 2048) {
+ cylinder <<= 1;
+ }
+ else if (hd_cylinders <= 4096) {
+ cylinder <<= 2;
+ }
+ else if (hd_cylinders <= 8192) {
+ cylinder <<= 3;
+ }
+ else { // hd_cylinders <= 16384
+ cylinder <<= 4;
+ }
+
+ ax = head / hd_heads;
+ cyl_mod = ax & 0xff;
+ head = ax >> 8;
+ cylinder |= cyl_mod;
+ }
+
+ if ( (cylinder >= hd_cylinders) ||
+ (sector > hd_sectors) ||
+ (head >= hd_heads) ) {
+ SET_AH(1);
+ SET_DISK_RET_STATUS(1);
+ SET_CF(); /* error occurred */
+ return;
+ }
+
+ if ( (num_sectors > 128) || (num_sectors == 0) )
+ BX_PANIC("int13_harddisk(): num_sectors out of range!\n");
+
+ if (head > 15)
+ BX_PANIC("hard drive BIOS:(read/verify) head > 15\n");
+
+ if ( GET_AH() == 0x04 ) {
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ CLEAR_CF();
+ return;
+ }
+
+ status = inb(0x1f7);
+ if (status & 0x80) {
+ BX_PANIC("hard drive BIOS:(read/verify) BUSY bit set\n");
+ }
+ outb(0x01f2, num_sectors);
+ /* activate LBA? (tomv) */
+ if (hd_heads > 16) {
+BX_DEBUG_INT13_HD("CHS: %x %x %x\n", cylinder, head, sector);
+ outLBA(cylinder,hd_heads,head,hd_sectors,sector,drive);
+ }
+ else {
+ outb(0x01f3, sector);
+ outb(0x01f4, cylinder & 0x00ff);
+ outb(0x01f5, cylinder >> 8);
+ outb(0x01f6, 0xa0 | ((drive & 0x01)<<4) | (head & 0x0f));
+ }
+ outb(0x01f7, 0x20);
+
+ while (1) {
+ status = inb(0x1f7);
+ if ( !(status & 0x80) ) break;
+ }
+
+ if (status & 0x01) {
+ BX_PANIC("hard drive BIOS:(read/verify) read error\n");
+ } else if ( !(status & 0x08) ) {
+ BX_DEBUG_INT13_HD("status was %02x\n", (unsigned) status);
+ BX_PANIC("hard drive BIOS:(read/verify) expected DRQ=1\n");
+ }
+
+ sector_count = 0;
+ tempbx = BX;
+
+ASM_START
+ sti ;; enable higher priority interrupts
+ASM_END
+
+ while (1) {
+ASM_START
+ ;; store temp bx in real DI register
+ push bp
+ mov bp, sp
+ mov di, _int13_harddisk.tempbx + 2 [bp]
+ pop bp
+
+ ;; adjust if there will be an overrun
+ cmp di, #0xfe00
+ jbe i13_f02_no_adjust
+i13_f02_adjust:
+ sub di, #0x0200 ; sub 512 bytes from offset
+ mov ax, es
+ add ax, #0x0020 ; add 512 to segment
+ mov es, ax
+
+i13_f02_no_adjust:
+ mov cx, #0x0100 ;; counter (256 words = 512b)
+ mov dx, #0x01f0 ;; AT data read port
+
+ rep
+ insw ;; CX words transfered from port(DX) to ES:[DI]
+
+i13_f02_done:
+ ;; store real DI register back to temp bx
+ push bp
+ mov bp, sp
+ mov _int13_harddisk.tempbx + 2 [bp], di
+ pop bp
+ASM_END
+
+ sector_count++;
+ num_sectors--;
+ if (num_sectors == 0) {
+ status = inb(0x1f7);
+ if ( (status & 0xc9) != 0x40 )
+ BX_PANIC("no sectors left to read/verify, status is %02x\n", (unsigned) status);
+ break;
+ }
+ else {
+ status = inb(0x1f7);
+ if ( (status & 0xc9) != 0x48 )
+ BX_PANIC("more sectors left to read/verify, status is %02x\n", (unsigned) status);
+ continue;
+ }
+ }
+
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ SET_AL(sector_count);
+ CLEAR_CF(); /* successful */
+ return;
+ break;
+
+
+ case 0x03: /* write disk sectors */
+BX_DEBUG_INT13_HD("int13_f03\n");
+ drive = GET_ELDL ();
+ get_hd_geometry(drive, &hd_cylinders, &hd_heads, &hd_sectors);
+
+ num_sectors = GET_AL();
+ cylinder = GET_CH();
+ cylinder |= ( ((Bit16u) GET_CL()) << 2) & 0x300;
+ sector = (GET_CL() & 0x3f);
+ head = GET_DH();
+
+ if (hd_cylinders > 1024) {
+ if (hd_cylinders <= 2048) {
+ cylinder <<= 1;
+ }
+ else if (hd_cylinders <= 4096) {
+ cylinder <<= 2;
+ }
+ else if (hd_cylinders <= 8192) {
+ cylinder <<= 3;
+ }
+ else { // hd_cylinders <= 16384
+ cylinder <<= 4;
+ }
+
+ ax = head / hd_heads;
+ cyl_mod = ax & 0xff;
+ head = ax >> 8;
+ cylinder |= cyl_mod;
+ }
+
+ if ( (cylinder >= hd_cylinders) ||
+ (sector > hd_sectors) ||
+ (head >= hd_heads) ) {
+ SET_AH( 1);
+ SET_DISK_RET_STATUS(1);
+ SET_CF(); /* error occurred */
+ return;
+ }
+
+ if ( (num_sectors > 128) || (num_sectors == 0) )
+ BX_PANIC("int13_harddisk(): num_sectors out of range!\n");
+
+ if (head > 15)
+ BX_PANIC("hard drive BIOS:(read) head > 15\n");
+
+ status = inb(0x1f7);
+ if (status & 0x80) {
+ BX_PANIC("hard drive BIOS:(read) BUSY bit set\n");
+ }
+// should check for Drive Ready Bit also in status reg
+ outb(0x01f2, num_sectors);
+
+ /* activate LBA? (tomv) */
+ if (hd_heads > 16) {
+BX_DEBUG_INT13_HD("CHS (write): %x %x %x\n", cylinder, head, sector);
+ outLBA(cylinder,hd_heads,head,hd_sectors,sector,GET_ELDL());
+ }
+ else {
+ outb(0x01f3, sector);
+ outb(0x01f4, cylinder & 0x00ff);
+ outb(0x01f5, cylinder >> 8);
+ outb(0x01f6, 0xa0 | ((GET_ELDL() & 0x01)<<4) | (head & 0x0f));
+ }
+ outb(0x01f7, 0x30);
+
+ // wait for busy bit to turn off after seeking
+ while (1) {
+ status = inb(0x1f7);
+ if ( !(status & 0x80) ) break;
+ }
+
+ if ( !(status & 0x08) ) {
+ BX_DEBUG_INT13_HD("status was %02x\n", (unsigned) status);
+ BX_PANIC("hard drive BIOS:(write) data-request bit not set\n");
+ }
+
+ sector_count = 0;
+ tempbx = BX;
+
+ASM_START
+ sti ;; enable higher priority interrupts
+ASM_END
+
+ while (1) {
+ASM_START
+ ;; store temp bx in real SI register
+ push bp
+ mov bp, sp
+ mov si, _int13_harddisk.tempbx + 2 [bp]
+ pop bp
+
+ ;; adjust if there will be an overrun
+ cmp si, #0xfe00
+ jbe i13_f03_no_adjust
+i13_f03_adjust:
+ sub si, #0x0200 ; sub 512 bytes from offset
+ mov ax, es
+ add ax, #0x0020 ; add 512 to segment
+ mov es, ax
+
+i13_f03_no_adjust:
+ mov cx, #0x0100 ;; counter (256 words = 512b)
+ mov dx, #0x01f0 ;; AT data read port
+
+ seg ES
+ rep
+ outsw ;; CX words tranfered from ES:[SI] to port(DX)
+
+ ;; store real SI register back to temp bx
+ push bp
+ mov bp, sp
+ mov _int13_harddisk.tempbx + 2 [bp], si
+ pop bp
+ASM_END
+
+ sector_count++;
+ num_sectors--;
+ if (num_sectors == 0) {
+ status = inb(0x1f7);
+ if ( (status & 0xe9) != 0x40 )
+ BX_PANIC("no sectors left to write, status is %02x\n", (unsigned) status);
+ break;
+ }
+ else {
+ status = inb(0x1f7);
+ if ( (status & 0xc9) != 0x48 )
+ BX_PANIC("more sectors left to write, status is %02x\n", (unsigned) status);
+ continue;
+ }
+ }
+
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ SET_AL(sector_count);
+ CLEAR_CF(); /* successful */
+ return;
+ break;
+
+ case 0x05: /* format disk track */
+BX_DEBUG_INT13_HD("int13_f05\n");
+ BX_PANIC("format disk track called\n");
+ /* nop */
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ CLEAR_CF(); /* successful */
+ return;
+ break;
+
+ case 0x08: /* read disk drive parameters */
+BX_DEBUG_INT13_HD("int13_f08\n");
+
+ drive = GET_ELDL ();
+ get_hd_geometry(drive, &hd_cylinders, &hd_heads, &hd_sectors);
+
+ // translate CHS
+ //
+ if (hd_cylinders <= 1024) {
+ // hd_cylinders >>= 0;
+ // hd_heads <<= 0;
+ }
+ else if (hd_cylinders <= 2048) {
+ hd_cylinders >>= 1;
+ hd_heads <<= 1;
+ }
+ else if (hd_cylinders <= 4096) {
+ hd_cylinders >>= 2;
+ hd_heads <<= 2;
+ }
+ else if (hd_cylinders <= 8192) {
+ hd_cylinders >>= 3;
+ hd_heads <<= 3;
+ }
+ else { // hd_cylinders <= 16384
+ hd_cylinders >>= 4;
+ hd_heads <<= 4;
+ }
+
+ max_cylinder = hd_cylinders - 2; /* 0 based */
+ SET_AL(0);
+ SET_CH(max_cylinder & 0xff);
+ SET_CL(((max_cylinder >> 2) & 0xc0) | (hd_sectors & 0x3f));
+ SET_DH(hd_heads - 1);
+ SET_DL(n_drives); /* returns 0, 1, or 2 hard drives */
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ CLEAR_CF(); /* successful */
+
+ return;
+ break;
+
+ case 0x09: /* initialize drive parameters */
+BX_DEBUG_INT13_HD("int13_f09\n");
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ CLEAR_CF(); /* successful */
+ return;
+ break;
+
+ case 0x0a: /* read disk sectors with ECC */
+BX_DEBUG_INT13_HD("int13_f0a\n");
+ case 0x0b: /* write disk sectors with ECC */
+BX_DEBUG_INT13_HD("int13_f0b\n");
+ BX_PANIC("int13h Functions 0Ah & 0Bh not implemented!\n");
+ return;
+ break;
+
+ case 0x0c: /* seek to specified cylinder */
+BX_DEBUG_INT13_HD("int13_f0c\n");
+ BX_INFO("int13h function 0ch (seek) not implemented!\n");
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ CLEAR_CF(); /* successful */
+ return;
+ break;
+
+ case 0x0d: /* alternate disk reset */
+BX_DEBUG_INT13_HD("int13_f0d\n");
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ CLEAR_CF(); /* successful */
+ return;
+ break;
+
+ case 0x10: /* check drive ready */
+BX_DEBUG_INT13_HD("int13_f10\n");
+ //SET_AH(0);
+ //SET_DISK_RET_STATUS(0);
+ //CLEAR_CF(); /* successful */
+ //return;
+ //break;
+
+ // should look at 40:8E also???
+ status = inb(0x01f7);
+ if ( (status & 0xc0) == 0x40 ) {
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ CLEAR_CF(); // drive ready
+ return;
+ }
+ else {
+ SET_AH(0xAA);
+ SET_DISK_RET_STATUS(0xAA);
+ SET_CF(); // not ready
+ return;
+ }
+ break;
+
+ case 0x11: /* recalibrate */
+BX_DEBUG_INT13_HD("int13_f11\n");
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ CLEAR_CF(); /* successful */
+ return;
+ break;
+
+ case 0x14: /* controller internal diagnostic */
+BX_DEBUG_INT13_HD("int13_f14\n");
+ SET_AH(0);
+ SET_DISK_RET_STATUS(0);
+ CLEAR_CF(); /* successful */
+ SET_AL(0);
+ return;
+ break;
+
+ case 0x15: /* read disk drive size */
+ drive = GET_ELDL();
+ get_hd_geometry(drive, &hd_cylinders, &hd_heads, &hd_sectors);
+ASM_START
+ push bp
+ mov bp, sp
+ mov al, _int13_harddisk.hd_heads + 2 [bp]
+ mov ah, _int13_harddisk.hd_sectors + 2 [bp]
+ mul al, ah ;; ax = heads * sectors
+ mov bx, _int13_harddisk.hd_cylinders + 2 [bp]
+ dec bx ;; use (cylinders - 1) ???
+ mul ax, bx ;; dx:ax = (cylinders -1) * (heads * sectors)
+ ;; now we need to move the 32bit result dx:ax to what the
+ ;; BIOS wants which is cx:dx.
+ ;; and then into CX:DX on the stack
+ mov _int13_harddisk.CX + 2 [bp], dx
+ mov _int13_harddisk.DX + 2 [bp], ax
+ pop bp
+ASM_END
+ SET_AH(3); // hard disk accessible
+ SET_DISK_RET_STATUS(0); // ??? should this be 0
+ CLEAR_CF(); // successful
+ return;
+ break;
+
+ case 0x18: // set media type for format
+ case 0x41: // IBM/MS
+ case 0x42: // IBM/MS
+ case 0x43: // IBM/MS
+ case 0x44: // IBM/MS
+ case 0x45: // IBM/MS lock/unlock drive
+ case 0x46: // IBM/MS eject media
+ case 0x47: // IBM/MS extended seek
+ case 0x49: // IBM/MS extended media change
+ case 0x50: // IBM/MS send packet command
+ default:
+ BX_INFO("int13_harddisk: unsupported AH=%02x\n", GET_AH());
+
+ SET_AH(1); // code=invalid function in AH or invalid parameter
+ SET_DISK_RET_STATUS(1);
+ SET_CF(); /* unsuccessful */
+ return;
+ break;
+ }
+}
+
+static char panic_msg_reg12h[] = "HD%d cmos reg 12h not type F\n";
+static char panic_msg_reg19h[] = "HD%d cmos reg %02xh not user definable type 47\n";
+
+ void
+get_hd_geometry(drive, hd_cylinders, hd_heads, hd_sectors)
+ Bit8u drive;
+ Bit16u *hd_cylinders;
+ Bit8u *hd_heads;
+ Bit8u *hd_sectors;
+{
+ Bit8u hd_type;
+ Bit16u ss;
+ Bit16u cylinders;
+ Bit8u iobase;
+
+ ss = get_SS();
+ if (drive == 0x80) {
+ hd_type = inb_cmos(0x12) & 0xf0;
+ if (hd_type != 0xf0)
+ BX_INFO(panic_msg_reg12h,0);
+ hd_type = inb_cmos(0x19); // HD0: extended type
+ if (hd_type != 47)
+ BX_INFO(panic_msg_reg19h,0,0x19);
+ iobase = 0x1b;
+ } else {
+ hd_type = inb_cmos(0x12) & 0x0f;
+ if (hd_type != 0x0f)
+ BX_INFO(panic_msg_reg12h,1);
+ hd_type = inb_cmos(0x1a); // HD0: extended type
+ if (hd_type != 47)
+ BX_INFO(panic_msg_reg19h,0,0x1a);
+ iobase = 0x24;
+ }
+
+ // cylinders
+ cylinders = inb_cmos(iobase) | (inb_cmos(iobase+1) << 8);
+ write_word(ss, hd_cylinders, cylinders);
+
+ // heads
+ write_byte(ss, hd_heads, inb_cmos(iobase+2));
+
+ // sectors per track
+ write_byte(ss, hd_sectors, inb_cmos(iobase+8));
+}
+
+#endif //else BX_USE_ATADRV
+
+
+//////////////////////
+// FLOPPY functions //
+//////////////////////
+
+void floppy_reset_controller()
+{
+ Bit8u val8;
+
+ // Reset controller
+ val8 = inb(0x03f2);
+ outb(0x03f2, val8 & ~0x04);
+ outb(0x03f2, val8 | 0x04);
+
+ // Wait for controller to come out of reset
+ do {
+ val8 = inb(0x3f4);
+ } while ( (val8 & 0xc0) != 0x80 );
+}
+
+void floppy_prepare_controller(drive)
+ Bit16u drive;
+{
+ Bit8u val8, dor, prev_reset;
+
+ // set 40:3e bit 7 to 0
+ val8 = read_byte(0x0040, 0x003e);
+ val8 &= 0x7f;
+ write_byte(0x0040, 0x003e, val8);
+
+ // turn on motor of selected drive, DMA & int enabled, normal operation
+ prev_reset = inb(0x03f2) & 0x04;
+ if (drive)
+ dor = 0x20;
+ else
+ dor = 0x10;
+ dor |= 0x0c;
+ dor |= drive;
+ outb(0x03f2, dor);
+
+ // reset the disk motor timeout value of INT 08
+ write_byte(0x40,0x40, BX_FLOPPY_ON_CNT);
+
+ // wait for drive readiness
+ do {
+ val8 = inb(0x3f4);
+ } while ( (val8 & 0xc0) != 0x80 );
+
+ if (prev_reset == 0) {
+ // turn on interrupts
+ASM_START
+ sti
+ASM_END
+ // wait on 40:3e bit 7 to become 1
+ do {
+ val8 = read_byte(0x0040, 0x003e);
+ } while ( (val8 & 0x80) == 0 );
+ val8 &= 0x7f;
+ASM_START
+ cli
+ASM_END
+ write_byte(0x0040, 0x003e, val8);
+ }
+}
+
+ bx_bool
+floppy_media_known(drive)
+ Bit16u drive;
+{
+ Bit8u val8;
+ Bit16u media_state_offset;
+
+ val8 = read_byte(0x0040, 0x003e); // diskette recal status
+ if (drive)
+ val8 >>= 1;
+ val8 &= 0x01;
+ if (val8 == 0)
+ return(0);
+
+ media_state_offset = 0x0090;
+ if (drive)
+ media_state_offset += 1;
+
+ val8 = read_byte(0x0040, media_state_offset);
+ val8 = (val8 >> 4) & 0x01;
+ if (val8 == 0)
+ return(0);
+
+ // check pass, return KNOWN
+ return(1);
+}
+
+ bx_bool
+floppy_media_sense(drive)
+ Bit16u drive;
+{
+ bx_bool retval;
+ Bit16u media_state_offset;
+ Bit8u drive_type, config_data, media_state;
+
+ if (floppy_drive_recal(drive) == 0) {
+ return(0);
+ }
+
+ // for now cheat and get drive type from CMOS,
+ // assume media is same as drive type
+
+ // ** config_data **
+ // Bitfields for diskette media control:
+ // Bit(s) Description (Table M0028)
+ // 7-6 last data rate set by controller
+ // 00=500kbps, 01=300kbps, 10=250kbps, 11=1Mbps
+ // 5-4 last diskette drive step rate selected
+ // 00=0Ch, 01=0Dh, 10=0Eh, 11=0Ah
+ // 3-2 {data rate at start of operation}
+ // 1-0 reserved
+
+ // ** media_state **
+ // Bitfields for diskette drive media state:
+ // Bit(s) Description (Table M0030)
+ // 7-6 data rate
+ // 00=500kbps, 01=300kbps, 10=250kbps, 11=1Mbps
+ // 5 double stepping required (e.g. 360kB in 1.2MB)
+ // 4 media type established
+ // 3 drive capable of supporting 4MB media
+ // 2-0 on exit from BIOS, contains
+ // 000 trying 360kB in 360kB
+ // 001 trying 360kB in 1.2MB
+ // 010 trying 1.2MB in 1.2MB
+ // 011 360kB in 360kB established
+ // 100 360kB in 1.2MB established
+ // 101 1.2MB in 1.2MB established
+ // 110 reserved
+ // 111 all other formats/drives
+
+ drive_type = inb_cmos(0x10);
+ if (drive == 0)
+ drive_type >>= 4;
+ else
+ drive_type &= 0x0f;
+ if ( drive_type == 1 ) {
+ // 360K 5.25" drive
+ config_data = 0x00; // 0000 0000
+ media_state = 0x25; // 0010 0101
+ retval = 1;
+ }
+ else if ( drive_type == 2 ) {
+ // 1.2 MB 5.25" drive
+ config_data = 0x00; // 0000 0000
+ media_state = 0x25; // 0010 0101 // need double stepping??? (bit 5)
+ retval = 1;
+ }
+ else if ( drive_type == 3 ) {
+ // 720K 3.5" drive
+ config_data = 0x00; // 0000 0000 ???
+ media_state = 0x17; // 0001 0111
+ retval = 1;
+ }
+ else if ( drive_type == 4 ) {
+ // 1.44 MB 3.5" drive
+ config_data = 0x00; // 0000 0000
+ media_state = 0x17; // 0001 0111
+ retval = 1;
+ }
+ else if ( drive_type == 5 ) {
+ // 2.88 MB 3.5" drive
+ config_data = 0xCC; // 1100 1100
+ media_state = 0xD7; // 1101 0111
+ retval = 1;
+ }
+ //
+ // Extended floppy size uses special cmos setting
+ else if ( drive_type == 6 ) {
+ // 160k 5.25" drive
+ config_data = 0x00; // 0000 0000
+ media_state = 0x27; // 0010 0111
+ retval = 1;
+ }
+ else if ( drive_type == 7 ) {
+ // 180k 5.25" drive
+ config_data = 0x00; // 0000 0000
+ media_state = 0x27; // 0010 0111
+ retval = 1;
+ }
+ else if ( drive_type == 8 ) {
+ // 320k 5.25" drive
+ config_data = 0x00; // 0000 0000
+ media_state = 0x27; // 0010 0111
+ retval = 1;
+ }
+
+ else {
+ // not recognized
+ config_data = 0x00; // 0000 0000
+ media_state = 0x00; // 0000 0000
+ retval = 0;
+ }
+
+ if (drive == 0)
+ media_state_offset = 0x90;
+ else
+ media_state_offset = 0x91;
+ write_byte(0x0040, 0x008B, config_data);
+ write_byte(0x0040, media_state_offset, media_state);
+
+ return(retval);
+}
+
+ bx_bool
+floppy_drive_recal(drive)
+ Bit16u drive;
+{
+ Bit8u val8;
+ Bit16u curr_cyl_offset;
+
+ floppy_prepare_controller(drive);
+
+ // send Recalibrate command (2 bytes) to controller
+ outb(0x03f5, 0x07); // 07: Recalibrate
+ outb(0x03f5, drive); // 0=drive0, 1=drive1
+
+ // turn on interrupts
+ASM_START
+ sti
+ASM_END
+
+ // wait on 40:3e bit 7 to become 1
+ do {
+ val8 = (read_byte(0x0040, 0x003e) & 0x80);
+ } while ( val8 == 0 );
+
+ val8 = 0; // separate asm from while() loop
+ // turn off interrupts
+ASM_START
+ cli
+ASM_END
+
+ // set 40:3e bit 7 to 0, and calibrated bit
+ val8 = read_byte(0x0040, 0x003e);
+ val8 &= 0x7f;
+ if (drive) {
+ val8 |= 0x02; // Drive 1 calibrated
+ curr_cyl_offset = 0x0095;
+ } else {
+ val8 |= 0x01; // Drive 0 calibrated
+ curr_cyl_offset = 0x0094;
+ }
+ write_byte(0x0040, 0x003e, val8);
+ write_byte(0x0040, curr_cyl_offset, 0); // current cylinder is 0
+
+ return(1);
+}
+
+
+
+ bx_bool
+floppy_drive_exists(drive)
+ Bit16u drive;
+{
+ Bit8u drive_type;
+
+ // check CMOS to see if drive exists
+ drive_type = inb_cmos(0x10);
+ if (drive == 0)
+ drive_type >>= 4;
+ else
+ drive_type &= 0x0f;
+ if ( drive_type == 0 )
+ return(0);
+ else
+ return(1);
+}
+
+#if BX_SUPPORT_FLOPPY
+ void
+int13_diskette_function(DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS)
+ Bit16u DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS;
+{
+ Bit8u drive, num_sectors, track, sector, head, status;
+ Bit16u base_address, base_count, base_es;
+ Bit8u page, mode_register, val8, dor;
+ Bit8u return_status[7];
+ Bit8u drive_type, num_floppies, ah;
+ Bit16u es, last_addr;
+
+ BX_DEBUG_INT13_FL("int13_diskette: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", AX, BX, CX, DX, ES);
+
+ ah = GET_AH();
+
+ switch ( ah ) {
+ case 0x00: // diskette controller reset
+BX_DEBUG_INT13_FL("floppy f00\n");
+ drive = GET_ELDL();
+ if (drive > 1) {
+ SET_AH(1); // invalid param
+ set_diskette_ret_status(1);
+ SET_CF();
+ return;
+ }
+ drive_type = inb_cmos(0x10);
+
+ if (drive == 0)
+ drive_type >>= 4;
+ else
+ drive_type &= 0x0f;
+ if (drive_type == 0) {
+ SET_AH(0x80); // drive not responding
+ set_diskette_ret_status(0x80);
+ SET_CF();
+ return;
+ }
+ SET_AH(0);
+ set_diskette_ret_status(0);
+ CLEAR_CF(); // successful
+ set_diskette_current_cyl(drive, 0); // current cylinder
+ return;
+
+ case 0x01: // Read Diskette Status
+ CLEAR_CF();
+ val8 = read_byte(0x0000, 0x0441);
+ SET_AH(val8);
+ if (val8) {
+ SET_CF();
+ }
+ return;
+
+ case 0x02: // Read Diskette Sectors
+ case 0x03: // Write Diskette Sectors
+ case 0x04: // Verify Diskette Sectors
+ num_sectors = GET_AL();
+ track = GET_CH();
+ sector = GET_CL();
+ head = GET_DH();
+ drive = GET_ELDL();
+
+ if ( (drive > 1) || (head > 1) ||
+ (num_sectors == 0) || (num_sectors > 72) ) {
+BX_INFO("floppy: drive>1 || head>1 ...\n");
+ SET_AH(1);
+ set_diskette_ret_status(1);
+ SET_AL(0); // no sectors read
+ SET_CF(); // error occurred
+ return;
+ }
+
+ // see if drive exists
+ if (floppy_drive_exists(drive) == 0) {
+ SET_AH(0x80); // not responding
+ set_diskette_ret_status(0x80);
+ SET_AL(0); // no sectors read
+ SET_CF(); // error occurred
+ return;
+ }
+
+ // see if media in drive, and type is known
+ if (floppy_media_known(drive) == 0) {
+ if (floppy_media_sense(drive) == 0) {
+ SET_AH(0x0C); // Media type not found
+ set_diskette_ret_status(0x0C);
+ SET_AL(0); // no sectors read
+ SET_CF(); // error occurred
+ return;
+ }
+ }
+
+ if (ah == 0x02) {
+ // Read Diskette Sectors
+
+ //-----------------------------------
+ // set up DMA controller for transfer
+ //-----------------------------------
+
+ // es:bx = pointer to where to place information from diskette
+ // port 04: DMA-1 base and current address, channel 2
+ // port 05: DMA-1 base and current count, channel 2
+ page = (ES >> 12); // upper 4 bits
+ base_es = (ES << 4); // lower 16bits contributed by ES
+ base_address = base_es + BX; // lower 16 bits of address
+ // contributed by ES:BX
+ if ( base_address < base_es ) {
+ // in case of carry, adjust page by 1
+ page++;
+ }
+ base_count = (num_sectors * 512) - 1;
+
+ // check for 64K boundary overrun
+ last_addr = base_address + base_count;
+ if (last_addr < base_address) {
+ SET_AH(0x09);
+ set_diskette_ret_status(0x09);
+ SET_AL(0); // no sectors read
+ SET_CF(); // error occurred
+ return;
+ }
+
+ BX_DEBUG_INT13_FL("masking DMA-1 c2\n");
+ outb(0x000a, 0x06);
+
+ BX_DEBUG_INT13_FL("clear flip-flop\n");
+ outb(0x000c, 0x00); // clear flip-flop
+ outb(0x0004, base_address);
+ outb(0x0004, base_address>>8);
+ BX_DEBUG_INT13_FL("clear flip-flop\n");
+ outb(0x000c, 0x00); // clear flip-flop
+ outb(0x0005, base_count);
+ outb(0x0005, base_count>>8);
+
+ // port 0b: DMA-1 Mode Register
+ mode_register = 0x46; // single mode, increment, autoinit disable,
+ // transfer type=write, channel 2
+ BX_DEBUG_INT13_FL("setting mode register\n");
+ outb(0x000b, mode_register);
+
+ BX_DEBUG_INT13_FL("setting page register\n");
+ // port 81: DMA-1 Page Register, channel 2
+ outb(0x0081, page);
+
+ BX_DEBUG_INT13_FL("unmask chan 2\n");
+ outb(0x000a, 0x02); // unmask channel 2
+
+ BX_DEBUG_INT13_FL("unmasking DMA-1 c2\n");
+ outb(0x000a, 0x02);
+
+ //--------------------------------------
+ // set up floppy controller for transfer
+ //--------------------------------------
+ floppy_prepare_controller(drive);
+
+ // send read-normal-data command (9 bytes) to controller
+ outb(0x03f5, 0xe6); // e6: read normal data
+ outb(0x03f5, (head << 2) | drive); // HD DR1 DR2
+ outb(0x03f5, track);
+ outb(0x03f5, head);
+ outb(0x03f5, sector);
+ outb(0x03f5, 2); // 512 byte sector size
+ outb(0x03f5, sector + num_sectors - 1); // last sector to read on track
+ outb(0x03f5, 0); // Gap length
+ outb(0x03f5, 0xff); // Gap length
+
+ // turn on interrupts
+ ASM_START
+ sti
+ ASM_END
+
+ // wait on 40:3e bit 7 to become 1
+ do {
+ val8 = read_byte(0x0040, 0x0040);
+ if (val8 == 0) {
+ floppy_reset_controller();
+ SET_AH(0x80); // drive not ready (timeout)
+ set_diskette_ret_status(0x80);
+ SET_AL(0); // no sectors read
+ SET_CF(); // error occurred
+ return;
+ }
+ val8 = (read_byte(0x0040, 0x003e) & 0x80);
+ } while ( val8 == 0 );
+
+ val8 = 0; // separate asm from while() loop
+ // turn off interrupts
+ ASM_START
+ cli
+ ASM_END
+
+ // set 40:3e bit 7 to 0
+ val8 = read_byte(0x0040, 0x003e);
+ val8 &= 0x7f;
+ write_byte(0x0040, 0x003e, val8);
+
+ // check port 3f4 for accessibility to status bytes
+ val8 = inb(0x3f4);
+ if ( (val8 & 0xc0) != 0xc0 )
+ BX_PANIC("int13_diskette: ctrl not ready\n");
+
+ // read 7 return status bytes from controller
+ // using loop index broken, have to unroll...
+ return_status[0] = inb(0x3f5);
+ return_status[1] = inb(0x3f5);
+ return_status[2] = inb(0x3f5);
+ return_status[3] = inb(0x3f5);
+ return_status[4] = inb(0x3f5);
+ return_status[5] = inb(0x3f5);
+ return_status[6] = inb(0x3f5);
+ // record in BIOS Data Area
+ write_byte(0x0040, 0x0042, return_status[0]);
+ write_byte(0x0040, 0x0043, return_status[1]);
+ write_byte(0x0040, 0x0044, return_status[2]);
+ write_byte(0x0040, 0x0045, return_status[3]);
+ write_byte(0x0040, 0x0046, return_status[4]);
+ write_byte(0x0040, 0x0047, return_status[5]);
+ write_byte(0x0040, 0x0048, return_status[6]);
+
+ if ( (return_status[0] & 0xc0) != 0 ) {
+ SET_AH(0x20);
+ set_diskette_ret_status(0x20);
+ SET_AL(0); // no sectors read
+ SET_CF(); // error occurred
+ return;
+ }
+
+ // ??? should track be new val from return_status[3] ?
+ set_diskette_current_cyl(drive, track);
+ // AL = number of sectors read (same value as passed)
+ SET_AH(0x00); // success
+ CLEAR_CF(); // success
+ return;
+ } else if (ah == 0x03) {
+ // Write Diskette Sectors
+
+ //-----------------------------------
+ // set up DMA controller for transfer
+ //-----------------------------------
+
+ // es:bx = pointer to where to place information from diskette
+ // port 04: DMA-1 base and current address, channel 2
+ // port 05: DMA-1 base and current count, channel 2
+ page = (ES >> 12); // upper 4 bits
+ base_es = (ES << 4); // lower 16bits contributed by ES
+ base_address = base_es + BX; // lower 16 bits of address
+ // contributed by ES:BX
+ if ( base_address < base_es ) {
+ // in case of carry, adjust page by 1
+ page++;
+ }
+ base_count = (num_sectors * 512) - 1;
+
+ // check for 64K boundary overrun
+ last_addr = base_address + base_count;
+ if (last_addr < base_address) {
+ SET_AH(0x09);
+ set_diskette_ret_status(0x09);
+ SET_AL(0); // no sectors read
+ SET_CF(); // error occurred
+ return;
+ }
+
+ BX_DEBUG_INT13_FL("masking DMA-1 c2\n");
+ outb(0x000a, 0x06);
+
+ outb(0x000c, 0x00); // clear flip-flop
+ outb(0x0004, base_address);
+ outb(0x0004, base_address>>8);
+ outb(0x000c, 0x00); // clear flip-flop
+ outb(0x0005, base_count);
+ outb(0x0005, base_count>>8);
+
+ // port 0b: DMA-1 Mode Register
+ mode_register = 0x4a; // single mode, increment, autoinit disable,
+ // transfer type=read, channel 2
+ outb(0x000b, mode_register);
+
+ // port 81: DMA-1 Page Register, channel 2
+ outb(0x0081, page);
+
+ BX_DEBUG_INT13_FL("unmasking DMA-1 c2\n");
+ outb(0x000a, 0x02);
+
+ //--------------------------------------
+ // set up floppy controller for transfer
+ //--------------------------------------
+ floppy_prepare_controller(drive);
+
+ // send write-normal-data command (9 bytes) to controller
+ outb(0x03f5, 0xc5); // c5: write normal data
+ outb(0x03f5, (head << 2) | drive); // HD DR1 DR2
+ outb(0x03f5, track);
+ outb(0x03f5, head);
+ outb(0x03f5, sector);
+ outb(0x03f5, 2); // 512 byte sector size
+ outb(0x03f5, sector + num_sectors - 1); // last sector to write on track
+ outb(0x03f5, 0); // Gap length
+ outb(0x03f5, 0xff); // Gap length
+
+ // turn on interrupts
+ ASM_START
+ sti
+ ASM_END
+
+ // wait on 40:3e bit 7 to become 1
+ do {
+ val8 = read_byte(0x0040, 0x0040);
+ if (val8 == 0) {
+ floppy_reset_controller();
+ SET_AH(0x80); // drive not ready (timeout)
+ set_diskette_ret_status(0x80);
+ SET_AL(0); // no sectors written
+ SET_CF(); // error occurred
+ return;
+ }
+ val8 = (read_byte(0x0040, 0x003e) & 0x80);
+ } while ( val8 == 0 );
+
+ val8 = 0; // separate asm from while() loop
+ // turn off interrupts
+ ASM_START
+ cli
+ ASM_END
+
+ // set 40:3e bit 7 to 0
+ val8 = read_byte(0x0040, 0x003e);
+ val8 &= 0x7f;
+ write_byte(0x0040, 0x003e, val8);
+
+ // check port 3f4 for accessibility to status bytes
+ val8 = inb(0x3f4);
+ if ( (val8 & 0xc0) != 0xc0 )
+ BX_PANIC("int13_diskette: ctrl not ready\n");
+
+ // read 7 return status bytes from controller
+ // using loop index broken, have to unroll...
+ return_status[0] = inb(0x3f5);
+ return_status[1] = inb(0x3f5);
+ return_status[2] = inb(0x3f5);
+ return_status[3] = inb(0x3f5);
+ return_status[4] = inb(0x3f5);
+ return_status[5] = inb(0x3f5);
+ return_status[6] = inb(0x3f5);
+ // record in BIOS Data Area
+ write_byte(0x0040, 0x0042, return_status[0]);
+ write_byte(0x0040, 0x0043, return_status[1]);
+ write_byte(0x0040, 0x0044, return_status[2]);
+ write_byte(0x0040, 0x0045, return_status[3]);
+ write_byte(0x0040, 0x0046, return_status[4]);
+ write_byte(0x0040, 0x0047, return_status[5]);
+ write_byte(0x0040, 0x0048, return_status[6]);
+
+ if ( (return_status[0] & 0xc0) != 0 ) {
+ if ( (return_status[1] & 0x02) != 0 ) {
+ // diskette not writable.
+ // AH=status code=0x03 (tried to write on write-protected disk)
+ // AL=number of sectors written=0
+ AX = 0x0300;
+ SET_CF();
+ return;
+ } else {
+ BX_PANIC("int13_diskette_function: read error\n");
+ }
+ }
+
+ // ??? should track be new val from return_status[3] ?
+ set_diskette_current_cyl(drive, track);
+ // AL = number of sectors read (same value as passed)
+ SET_AH(0x00); // success
+ CLEAR_CF(); // success
+ return;
+ } else { // if (ah == 0x04)
+ // Verify Diskette Sectors
+
+ // ??? should track be new val from return_status[3] ?
+ set_diskette_current_cyl(drive, track);
+ // AL = number of sectors verified (same value as passed)
+ CLEAR_CF(); // success
+ SET_AH(0x00); // success
+ return;
+ }
+ break;
+
+ case 0x05: // format diskette track
+BX_DEBUG_INT13_FL("floppy f05\n");
+
+ num_sectors = GET_AL();
+ track = GET_CH();
+ head = GET_DH();
+ drive = GET_ELDL();
+
+ if ((drive > 1) || (head > 1) || (track > 79) ||
+ (num_sectors == 0) || (num_sectors > 18)) {
+ SET_AH(1);
+ set_diskette_ret_status(1);
+ SET_CF(); // error occurred
+ }
+
+ // see if drive exists
+ if (floppy_drive_exists(drive) == 0) {
+ SET_AH(0x80); // drive not responding
+ set_diskette_ret_status(0x80);
+ SET_CF(); // error occurred
+ return;
+ }
+
+ // see if media in drive, and type is known
+ if (floppy_media_known(drive) == 0) {
+ if (floppy_media_sense(drive) == 0) {
+ SET_AH(0x0C); // Media type not found
+ set_diskette_ret_status(0x0C);
+ SET_AL(0); // no sectors read
+ SET_CF(); // error occurred
+ return;
+ }
+ }
+
+ // set up DMA controller for transfer
+ page = (ES >> 12); // upper 4 bits
+ base_es = (ES << 4); // lower 16bits contributed by ES
+ base_address = base_es + BX; // lower 16 bits of address
+ // contributed by ES:BX
+ if ( base_address < base_es ) {
+ // in case of carry, adjust page by 1
+ page++;
+ }
+ base_count = (num_sectors * 4) - 1;
+
+ // check for 64K boundary overrun
+ last_addr = base_address + base_count;
+ if (last_addr < base_address) {
+ SET_AH(0x09);
+ set_diskette_ret_status(0x09);
+ SET_AL(0); // no sectors read
+ SET_CF(); // error occurred
+ return;
+ }
+
+ outb(0x000a, 0x06);
+ outb(0x000c, 0x00); // clear flip-flop
+ outb(0x0004, base_address);
+ outb(0x0004, base_address>>8);
+ outb(0x000c, 0x00); // clear flip-flop
+ outb(0x0005, base_count);
+ outb(0x0005, base_count>>8);
+ mode_register = 0x4a; // single mode, increment, autoinit disable,
+ // transfer type=read, channel 2
+ outb(0x000b, mode_register);
+ // port 81: DMA-1 Page Register, channel 2
+ outb(0x0081, page);
+ outb(0x000a, 0x02);
+
+ // set up floppy controller for transfer
+ floppy_prepare_controller(drive);
+
+ // send format-track command (6 bytes) to controller
+ outb(0x03f5, 0x4d); // 4d: format track
+ outb(0x03f5, (head << 2) | drive); // HD DR1 DR2
+ outb(0x03f5, 2); // 512 byte sector size
+ outb(0x03f5, num_sectors); // number of sectors per track
+ outb(0x03f5, 0); // Gap length
+ outb(0x03f5, 0xf6); // Fill byte
+ // turn on interrupts
+ ASM_START
+ sti
+ ASM_END
+
+ // wait on 40:3e bit 7 to become 1
+ do {
+ val8 = read_byte(0x0040, 0x0040);
+ if (val8 == 0) {
+ floppy_reset_controller();
+ SET_AH(0x80); // drive not ready (timeout)
+ set_diskette_ret_status(0x80);
+ SET_CF(); // error occurred
+ return;
+ }
+ val8 = (read_byte(0x0040, 0x003e) & 0x80);
+ } while ( val8 == 0 );
+
+ val8 = 0; // separate asm from while() loop
+ // turn off interrupts
+ ASM_START
+ cli
+ ASM_END
+ // set 40:3e bit 7 to 0
+ val8 = read_byte(0x0040, 0x003e);
+ val8 &= 0x7f;
+ write_byte(0x0040, 0x003e, val8);
+ // check port 3f4 for accessibility to status bytes
+ val8 = inb(0x3f4);
+ if ( (val8 & 0xc0) != 0xc0 )
+ BX_PANIC("int13_diskette: ctrl not ready\n");
+
+ // read 7 return status bytes from controller
+ // using loop index broken, have to unroll...
+ return_status[0] = inb(0x3f5);
+ return_status[1] = inb(0x3f5);
+ return_status[2] = inb(0x3f5);
+ return_status[3] = inb(0x3f5);
+ return_status[4] = inb(0x3f5);
+ return_status[5] = inb(0x3f5);
+ return_status[6] = inb(0x3f5);
+ // record in BIOS Data Area
+ write_byte(0x0040, 0x0042, return_status[0]);
+ write_byte(0x0040, 0x0043, return_status[1]);
+ write_byte(0x0040, 0x0044, return_status[2]);
+ write_byte(0x0040, 0x0045, return_status[3]);
+ write_byte(0x0040, 0x0046, return_status[4]);
+ write_byte(0x0040, 0x0047, return_status[5]);
+ write_byte(0x0040, 0x0048, return_status[6]);
+
+ if ( (return_status[0] & 0xc0) != 0 ) {
+ if ( (return_status[1] & 0x02) != 0 ) {
+ // diskette not writable.
+ // AH=status code=0x03 (tried to write on write-protected disk)
+ // AL=number of sectors written=0
+ AX = 0x0300;
+ SET_CF();
+ return;
+ } else {
+ BX_PANIC("int13_diskette_function: write error\n");
+ }
+ }
+
+ SET_AH(0);
+ set_diskette_ret_status(0);
+ set_diskette_current_cyl(drive, 0);
+ CLEAR_CF(); // successful
+ return;
+
+
+ case 0x08: // read diskette drive parameters
+BX_DEBUG_INT13_FL("floppy f08\n");
+ drive = GET_ELDL();
+
+ if (drive > 1) {
+ AX = 0;
+ BX = 0;
+ CX = 0;
+ DX = 0;
+ ES = 0;
+ DI = 0;
+ SET_DL(num_floppies);
+ SET_CF();
+ return;
+ }
+
+ drive_type = inb_cmos(0x10);
+ num_floppies = 0;
+ if (drive_type & 0xf0)
+ num_floppies++;
+ if (drive_type & 0x0f)
+ num_floppies++;
+
+ if (drive == 0)
+ drive_type >>= 4;
+ else
+ drive_type &= 0x0f;
+
+ SET_BH(0);
+ SET_BL(drive_type);
+ SET_AH(0);
+ SET_AL(0);
+ SET_DL(num_floppies);
+
+ switch (drive_type) {
+ case 0: // none
+ CX = 0;
+ SET_DH(0); // max head #
+ break;
+
+ case 1: // 360KB, 5.25"
+ CX = 0x2709; // 40 tracks, 9 sectors
+ SET_DH(1); // max head #
+ break;
+
+ case 2: // 1.2MB, 5.25"
+ CX = 0x4f0f; // 80 tracks, 15 sectors
+ SET_DH(1); // max head #
+ break;
+
+ case 3: // 720KB, 3.5"
+ CX = 0x4f09; // 80 tracks, 9 sectors
+ SET_DH(1); // max head #
+ break;
+
+ case 4: // 1.44MB, 3.5"
+ CX = 0x4f12; // 80 tracks, 18 sectors
+ SET_DH(1); // max head #
+ break;
+
+ case 5: // 2.88MB, 3.5"
+ CX = 0x4f24; // 80 tracks, 36 sectors
+ SET_DH(1); // max head #
+ break;
+
+ case 6: // 160k, 5.25"
+ CX = 0x2708; // 40 tracks, 8 sectors
+ SET_DH(0); // max head #
+ break;
+
+ case 7: // 180k, 5.25"
+ CX = 0x2709; // 40 tracks, 9 sectors
+ SET_DH(0); // max head #
+ break;
+
+ case 8: // 320k, 5.25"
+ CX = 0x2708; // 40 tracks, 8 sectors
+ SET_DH(1); // max head #
+ break;
+
+ default: // ?
+ BX_PANIC("floppy: int13: bad floppy type\n");
+ }
+
+ /* set es & di to point to 11 byte diskette param table in ROM */
+ASM_START
+ push bp
+ mov bp, sp
+ mov ax, #diskette_param_table2
+ mov _int13_diskette_function.DI+2[bp], ax
+ mov _int13_diskette_function.ES+2[bp], cs
+ pop bp
+ASM_END
+ CLEAR_CF(); // success
+ /* disk status not changed upon success */
+ return;
+
+
+ case 0x15: // read diskette drive type
+BX_DEBUG_INT13_FL("floppy f15\n");
+ drive = GET_ELDL();
+ if (drive > 1) {
+ SET_AH(0); // only 2 drives supported
+ // set_diskette_ret_status here ???
+ SET_CF();
+ return;
+ }
+ drive_type = inb_cmos(0x10);
+
+ if (drive == 0)
+ drive_type >>= 4;
+ else
+ drive_type &= 0x0f;
+ CLEAR_CF(); // successful, not present
+ if (drive_type==0) {
+ SET_AH(0); // drive not present
+ }
+ else {
+ SET_AH(1); // drive present, does not support change line
+ }
+
+ return;
+
+ case 0x16: // get diskette change line status
+BX_DEBUG_INT13_FL("floppy f16\n");
+ drive = GET_ELDL();
+ if (drive > 1) {
+ SET_AH(0x01); // invalid drive
+ set_diskette_ret_status(0x01);
+ SET_CF();
+ return;
+ }
+
+ SET_AH(0x06); // change line not supported
+ set_diskette_ret_status(0x06);
+ SET_CF();
+ return;
+
+ case 0x17: // set diskette type for format(old)
+BX_DEBUG_INT13_FL("floppy f17\n");
+ /* not used for 1.44M floppies */
+ SET_AH(0x01); // not supported
+ set_diskette_ret_status(1); /* not supported */
+ SET_CF();
+ return;
+
+ case 0x18: // set diskette type for format(new)
+BX_DEBUG_INT13_FL("floppy f18\n");
+ SET_AH(0x01); // do later
+ set_diskette_ret_status(1);
+ SET_CF();
+ return;
+
+ default:
+ BX_INFO("int13_diskette: unsupported AH=%02x\n", GET_AH());
+
+ // if ( (ah==0x20) || ((ah>=0x41) && (ah<=0x49)) || (ah==0x4e) ) {
+ SET_AH(0x01); // ???
+ set_diskette_ret_status(1);
+ SET_CF();
+ return;
+ // }
+ }
+}
+#else // #if BX_SUPPORT_FLOPPY
+ void
+int13_diskette_function(DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS)
+ Bit16u DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS;
+{
+ Bit8u val8;
+
+ switch ( GET_AH() ) {
+
+ case 0x01: // Read Diskette Status
+ CLEAR_CF();
+ val8 = read_byte(0x0000, 0x0441);
+ SET_AH(val8);
+ if (val8) {
+ SET_CF();
+ }
+ return;
+
+ default:
+ SET_CF();
+ write_byte(0x0000, 0x0441, 0x01);
+ SET_AH(0x01);
+ }
+}
+#endif // #if BX_SUPPORT_FLOPPY
+
+ void
+set_diskette_ret_status(value)
+ Bit8u value;
+{
+ write_byte(0x0040, 0x0041, value);
+}
+
+ void
+set_diskette_current_cyl(drive, cyl)
+ Bit8u drive;
+ Bit8u cyl;
+{
+ if (drive > 1)
+ BX_PANIC("set_diskette_current_cyl(): drive > 1\n");
+ write_byte(0x0040, 0x0094+drive, cyl);
+}
+
+ void
+determine_floppy_media(drive)
+ Bit16u drive;
+{
+#if 0
+ Bit8u val8, DOR, ctrl_info;
+
+ ctrl_info = read_byte(0x0040, 0x008F);
+ if (drive==1)
+ ctrl_info >>= 4;
+ else
+ ctrl_info &= 0x0f;
+
+#if 0
+ if (drive == 0) {
+ DOR = 0x1c; // DOR: drive0 motor on, DMA&int enabled, normal op, drive select 0
+ }
+ else {
+ DOR = 0x2d; // DOR: drive1 motor on, DMA&int enabled, normal op, drive select 1
+ }
+#endif
+
+ if ( (ctrl_info & 0x04) != 0x04 ) {
+ // Drive not determined means no drive exists, done.
+ return;
+ }
+
+#if 0
+ // check Main Status Register for readiness
+ val8 = inb(0x03f4) & 0x80; // Main Status Register
+ if (val8 != 0x80)
+ BX_PANIC("d_f_m: MRQ bit not set\n");
+
+ // change line
+
+ // existing BDA values
+
+ // turn on drive motor
+ outb(0x03f2, DOR); // Digital Output Register
+ //
+#endif
+ BX_PANIC("d_f_m: OK so far\n");
+#endif
+}
+
+ void
+int17_function(regs, ds, iret_addr)
+ pusha_regs_t regs; // regs pushed from PUSHA instruction
+ Bit16u ds; // previous DS:, DS set to 0x0000 by asm wrapper
+ iret_addr_t iret_addr; // CS,IP,Flags pushed from original INT call
+{
+ Bit16u addr,timeout;
+ Bit8u val8;
+
+ ASM_START
+ sti
+ ASM_END
+
+ addr = read_word(0x0040, (regs.u.r16.dx << 1) + 8);
+ if ((regs.u.r8.ah < 3) && (regs.u.r16.dx < 3) && (addr > 0)) {
+ timeout = read_byte(0x0040, 0x0078 + regs.u.r16.dx) << 8;
+ if (regs.u.r8.ah == 0) {
+ outb(addr, regs.u.r8.al);
+ val8 = inb(addr+2);
+ outb(addr+2, val8 | 0x01); // send strobe
+ ASM_START
+ nop
+ ASM_END
+ outb(addr+2, val8 & ~0x01);
+ while (((inb(addr+1) & 0x40) == 0x40) && (timeout)) {
+ timeout--;
+ }
+ }
+ if (regs.u.r8.ah == 1) {
+ val8 = inb(addr+2);
+ outb(addr+2, val8 & ~0x04); // send init
+ ASM_START
+ nop
+ ASM_END
+ outb(addr+2, val8 | 0x04);
+ }
+ val8 = inb(addr+1);
+ regs.u.r8.ah = (val8 ^ 0x48);
+ if (!timeout) regs.u.r8.ah |= 0x01;
+ ClearCF(iret_addr.flags);
+ } else {
+ SetCF(iret_addr.flags); // Unsupported
+ }
+}
+
+// returns bootsegment in ax, drive in bl
+ Bit32u
+int19_function(bseqnr)
+Bit8u bseqnr;
+{
+ Bit16u ebda_seg=read_word(0x0040,0x000E);
+ Bit16u bootseq;
+ Bit8u bootdrv;
+ Bit8u bootcd;
+ Bit8u bootchk;
+ Bit16u bootseg;
+ Bit16u status;
+ Bit8u lastdrive=0;
+
+ // if BX_ELTORITO_BOOT is not defined, old behavior
+ // check bit 5 in CMOS reg 0x2d. load either 0x00 or 0x80 into DL
+ // in preparation for the intial INT 13h (0=floppy A:, 0x80=C:)
+ // 0: system boot sequence, first drive C: then A:
+ // 1: system boot sequence, first drive A: then C:
+ // else BX_ELTORITO_BOOT is defined
+ // CMOS regs 0x3D and 0x38 contain the boot sequence:
+ // CMOS reg 0x3D & 0x0f : 1st boot device
+ // CMOS reg 0x3D & 0xf0 : 2nd boot device
+ // CMOS reg 0x38 & 0xf0 : 3rd boot device
+ // boot device codes:
+ // 0x00 : not defined
+ // 0x01 : first floppy
+ // 0x02 : first harddrive
+ // 0x03 : first cdrom
+ // else : boot failure
+
+ // Get the boot sequence
+#if BX_ELTORITO_BOOT
+ bootseq=inb_cmos(0x3d);
+ bootseq|=((inb_cmos(0x38) & 0xf0) << 4);
+
+ if (bseqnr==2) bootseq >>= 4;
+ if (bseqnr==3) bootseq >>= 8;
+ if (bootseq<0x10) lastdrive = 1;
+ bootdrv=0x00; bootcd=0;
+ switch(bootseq & 0x0f) {
+ case 0x01: bootdrv=0x00; bootcd=0; break;
+ case 0x02: bootdrv=0x80; bootcd=0; break;
+ case 0x03: bootdrv=0x00; bootcd=1; break;
+ default: return 0x00000000;
+ }
+#else
+ bootseq=inb_cmos(0x2d);
+
+ if (bseqnr==2) {
+ bootseq ^= 0x20;
+ lastdrive = 1;
+ }
+ bootdrv=0x00; bootcd=0;
+ if((bootseq&0x20)==0) bootdrv=0x80;
+#endif // BX_ELTORITO_BOOT
+
+#if BX_ELTORITO_BOOT
+ // We have to boot from cd
+ if (bootcd != 0) {
+ status = cdrom_boot();
+
+ // If failure
+ if ( (status & 0x00ff) !=0 ) {
+ print_cdromboot_failure(status);
+ print_boot_failure(bootcd, bootdrv, 1, lastdrive);
+ return 0x00000000;
+ }
+
+ bootseg = read_word(ebda_seg,&EbdaData->cdemu.load_segment);
+ bootdrv = (Bit8u)(status>>8);
+ }
+
+#endif // BX_ELTORITO_BOOT
+
+ // We have to boot from harddisk or floppy
+ if (bootcd == 0) {
+ bootseg=0x07c0;
+
+ASM_START
+ push bp
+ mov bp, sp
+
+ mov ax, #0x0000
+ mov _int19_function.status + 2[bp], ax
+ mov dl, _int19_function.bootdrv + 2[bp]
+ mov ax, _int19_function.bootseg + 2[bp]
+ mov es, ax ;; segment
+ mov bx, #0x0000 ;; offset
+ mov ah, #0x02 ;; function 2, read diskette sector
+ mov al, #0x01 ;; read 1 sector
+ mov ch, #0x00 ;; track 0
+ mov cl, #0x01 ;; sector 1
+ mov dh, #0x00 ;; head 0
+ int #0x13 ;; read sector
+ jnc int19_load_done
+ mov ax, #0x0001
+ mov _int19_function.status + 2[bp], ax
+
+int19_load_done:
+ pop bp
+ASM_END
+
+ if (status != 0) {
+ print_boot_failure(bootcd, bootdrv, 1, lastdrive);
+ return 0x00000000;
+ }
+ }
+
+ // check signature if instructed by cmos reg 0x38, only for floppy
+ // bootchk = 1 : signature check disabled
+ // bootchk = 0 : signature check enabled
+ if (bootdrv != 0) bootchk = 0;
+ else bootchk = inb_cmos(0x38) & 0x01;
+
+#if BX_ELTORITO_BOOT
+ // if boot from cd, no signature check
+ if (bootcd != 0)
+ bootchk = 1;
+#endif // BX_ELTORITO_BOOT
+
+ if (bootchk == 0) {
+ if (read_word(bootseg,0x1fe) != 0xaa55) {
+ print_boot_failure(bootcd, bootdrv, 0, lastdrive);
+ return 0x00000000;
+ }
+ }
+
+#if BX_ELTORITO_BOOT
+ // Print out the boot string
+ print_boot_device(bootcd, bootdrv);
+#else // BX_ELTORITO_BOOT
+ print_boot_device(0, bootdrv);
+#endif // BX_ELTORITO_BOOT
+
+ // return the boot segment
+ return (((Bit32u)bootdrv) << 16) + bootseg;
+}
+
+ void
+int1a_function(regs, ds, iret_addr)
+ pusha_regs_t regs; // regs pushed from PUSHA instruction
+ Bit16u ds; // previous DS:, DS set to 0x0000 by asm wrapper
+ iret_addr_t iret_addr; // CS,IP,Flags pushed from original INT call
+{
+ Bit8u val8;
+
+ BX_DEBUG_INT1A("int1a: AX=%04x BX=%04x CX=%04x DX=%04x DS=%04x\n", regs.u.r16.ax, regs.u.r16.bx, regs.u.r16.cx, regs.u.r16.dx, ds);
+
+ ASM_START
+ sti
+ ASM_END
+
+ switch (regs.u.r8.ah) {
+ case 0: // get current clock count
+ ASM_START
+ cli
+ ASM_END
+ regs.u.r16.cx = BiosData->ticks_high;
+ regs.u.r16.dx = BiosData->ticks_low;
+ regs.u.r8.al = BiosData->midnight_flag;
+ BiosData->midnight_flag = 0; // reset flag
+ ASM_START
+ sti
+ ASM_END
+ // AH already 0
+ ClearCF(iret_addr.flags); // OK
+ break;
+
+ case 1: // Set Current Clock Count
+ ASM_START
+ cli
+ ASM_END
+ BiosData->ticks_high = regs.u.r16.cx;
+ BiosData->ticks_low = regs.u.r16.dx;
+ BiosData->midnight_flag = 0; // reset flag
+ ASM_START
+ sti
+ ASM_END
+ regs.u.r8.ah = 0;
+ ClearCF(iret_addr.flags); // OK
+ break;
+
+
+ case 2: // Read CMOS Time
+ if (rtc_updating()) {
+ SetCF(iret_addr.flags);
+ break;
+ }
+
+ regs.u.r8.dh = inb_cmos(0x00); // Seconds
+ regs.u.r8.cl = inb_cmos(0x02); // Minutes
+ regs.u.r8.ch = inb_cmos(0x04); // Hours
+ regs.u.r8.dl = inb_cmos(0x0b) & 0x01; // Stat Reg B
+ regs.u.r8.ah = 0;
+ regs.u.r8.al = regs.u.r8.ch;
+ ClearCF(iret_addr.flags); // OK
+ break;
+
+ case 3: // Set CMOS Time
+ // Using a debugger, I notice the following masking/setting
+ // of bits in Status Register B, by setting Reg B to
+ // a few values and getting its value after INT 1A was called.
+ //
+ // try#1 try#2 try#3
+ // before 1111 1101 0111 1101 0000 0000
+ // after 0110 0010 0110 0010 0000 0010
+ //
+ // Bit4 in try#1 flipped in hardware (forced low) due to bit7=1
+ // My assumption: RegB = ((RegB & 01100000b) | 00000010b)
+ if (rtc_updating()) {
+ init_rtc();
+ // fall through as if an update were not in progress
+ }
+ outb_cmos(0x00, regs.u.r8.dh); // Seconds
+ outb_cmos(0x02, regs.u.r8.cl); // Minutes
+ outb_cmos(0x04, regs.u.r8.ch); // Hours
+ // Set Daylight Savings time enabled bit to requested value
+ val8 = (inb_cmos(0x0b) & 0x60) | 0x02 | (regs.u.r8.dl & 0x01);
+ // (reg B already selected)
+ outb_cmos(0x0b, val8);
+ regs.u.r8.ah = 0;
+ regs.u.r8.al = val8; // val last written to Reg B
+ ClearCF(iret_addr.flags); // OK
+ break;
+
+ case 4: // Read CMOS Date
+ regs.u.r8.ah = 0;
+ if (rtc_updating()) {
+ SetCF(iret_addr.flags);
+ break;
+ }
+ regs.u.r8.cl = inb_cmos(0x09); // Year
+ regs.u.r8.dh = inb_cmos(0x08); // Month
+ regs.u.r8.dl = inb_cmos(0x07); // Day of Month
+ regs.u.r8.ch = inb_cmos(0x32); // Century
+ regs.u.r8.al = regs.u.r8.ch;
+ ClearCF(iret_addr.flags); // OK
+ break;
+
+ case 5: // Set CMOS Date
+ // Using a debugger, I notice the following masking/setting
+ // of bits in Status Register B, by setting Reg B to
+ // a few values and getting its value after INT 1A was called.
+ //
+ // try#1 try#2 try#3 try#4
+ // before 1111 1101 0111 1101 0000 0010 0000 0000
+ // after 0110 1101 0111 1101 0000 0010 0000 0000
+ //
+ // Bit4 in try#1 flipped in hardware (forced low) due to bit7=1
+ // My assumption: RegB = (RegB & 01111111b)
+ if (rtc_updating()) {
+ init_rtc();
+ SetCF(iret_addr.flags);
+ break;
+ }
+ outb_cmos(0x09, regs.u.r8.cl); // Year
+ outb_cmos(0x08, regs.u.r8.dh); // Month
+ outb_cmos(0x07, regs.u.r8.dl); // Day of Month
+ outb_cmos(0x32, regs.u.r8.ch); // Century
+ val8 = inb_cmos(0x0b) & 0x7f; // clear halt-clock bit
+ outb_cmos(0x0b, val8);
+ regs.u.r8.ah = 0;
+ regs.u.r8.al = val8; // AL = val last written to Reg B
+ ClearCF(iret_addr.flags); // OK
+ break;
+
+ case 6: // Set Alarm Time in CMOS
+ // Using a debugger, I notice the following masking/setting
+ // of bits in Status Register B, by setting Reg B to
+ // a few values and getting its value after INT 1A was called.
+ //
+ // try#1 try#2 try#3
+ // before 1101 1111 0101 1111 0000 0000
+ // after 0110 1111 0111 1111 0010 0000
+ //
+ // Bit4 in try#1 flipped in hardware (forced low) due to bit7=1
+ // My assumption: RegB = ((RegB & 01111111b) | 00100000b)
+ val8 = inb_cmos(0x0b); // Get Status Reg B
+ regs.u.r16.ax = 0;
+ if (val8 & 0x20) {
+ // Alarm interrupt enabled already
+ SetCF(iret_addr.flags); // Error: alarm in use
+ break;
+ }
+ if (rtc_updating()) {
+ init_rtc();
+ // fall through as if an update were not in progress
+ }
+ outb_cmos(0x01, regs.u.r8.dh); // Seconds alarm
+ outb_cmos(0x03, regs.u.r8.cl); // Minutes alarm
+ outb_cmos(0x05, regs.u.r8.ch); // Hours alarm
+ outb(0xa1, inb(0xa1) & 0xfe); // enable IRQ 8
+ // enable Status Reg B alarm bit, clear halt clock bit
+ outb_cmos(0x0b, (val8 & 0x7f) | 0x20);
+ ClearCF(iret_addr.flags); // OK
+ break;
+
+ case 7: // Turn off Alarm
+ // Using a debugger, I notice the following masking/setting
+ // of bits in Status Register B, by setting Reg B to
+ // a few values and getting its value after INT 1A was called.
+ //
+ // try#1 try#2 try#3 try#4
+ // before 1111 1101 0111 1101 0010 0000 0010 0010
+ // after 0100 0101 0101 0101 0000 0000 0000 0010
+ //
+ // Bit4 in try#1 flipped in hardware (forced low) due to bit7=1
+ // My assumption: RegB = (RegB & 01010111b)
+ val8 = inb_cmos(0x0b); // Get Status Reg B
+ // clear clock-halt bit, disable alarm bit
+ outb_cmos(0x0b, val8 & 0x57); // disable alarm bit
+ regs.u.r8.ah = 0;
+ regs.u.r8.al = val8; // val last written to Reg B
+ ClearCF(iret_addr.flags); // OK
+ break;
+#if BX_PCIBIOS
+ case 0xb1:
+ // real mode PCI BIOS functions now handled in assembler code
+ // this C code handles the error code for information only
+ if (regs.u.r8.bl == 0xff) {
+ BX_INFO("PCI BIOS: PCI not present\n");
+ } else if (regs.u.r8.bl == 0x81) {
+ BX_INFO("unsupported PCI BIOS function 0x%02x\n", regs.u.r8.al);
+ } else if (regs.u.r8.bl == 0x83) {
+ BX_INFO("bad PCI vendor ID %04x\n", regs.u.r16.dx);
+ } else if (regs.u.r8.bl == 0x86) {
+ BX_INFO("PCI device %04x:%04x not found at index %d\n", regs.u.r16.dx, regs.u.r16.cx, regs.u.r16.si);
+ }
+ regs.u.r8.ah = regs.u.r8.bl;
+ SetCF(iret_addr.flags);
+ break;
+#endif
+
+ default:
+ SetCF(iret_addr.flags); // Unsupported
+ }
+}
+
+ void
+int70_function(regs, ds, iret_addr)
+ pusha_regs_t regs; // regs pushed from PUSHA instruction
+ Bit16u ds; // previous DS:, DS set to 0x0000 by asm wrapper
+ iret_addr_t iret_addr; // CS,IP,Flags pushed from original INT call
+{
+ // INT 70h: IRQ 8 - CMOS RTC interrupt from periodic or alarm modes
+ Bit8u registerB = 0, registerC = 0;
+
+ // Check which modes are enabled and have occurred.
+ registerB = inb_cmos( 0xB );
+ registerC = inb_cmos( 0xC );
+
+ if( ( registerB & 0x60 ) != 0 ) {
+ if( ( registerC & 0x20 ) != 0 ) {
+ // Handle Alarm Interrupt.
+ASM_START
+ sti
+ int #0x4a
+ cli
+ASM_END
+ }
+ if( ( registerC & 0x40 ) != 0 ) {
+ // Handle Periodic Interrupt.
+
+ if( read_byte( 0x40, 0xA0 ) != 0 ) {
+ // Wait Interval (Int 15, AH=83) active.
+ Bit32u time, toggle;
+
+ time = read_dword( 0x40, 0x9C ); // Time left in microseconds.
+ if( time < 0x3D1 ) {
+ // Done waiting.
+ Bit16u segment, offset;
+
+ segment = read_word( 0x40, 0x98 );
+ offset = read_word( 0x40, 0x9A );
+ write_byte( 0x40, 0xA0, 0 ); // Turn of status byte.
+ outb_cmos( 0xB, registerB & 0x37 ); // Clear the Periodic Interrupt.
+ write_byte(segment, offset, read_byte(segment, offset) | 0x80 ); // Write to specified flag byte.
+ } else {
+ // Continue waiting.
+ time -= 0x3D1;
+ write_dword( 0x40, 0x9C, time );
+ }
+ }
+ }
+ }
+
+ASM_START
+ call eoi_both_pics
+ASM_END
+}
+
+
+ASM_START
+;------------------------------------------
+;- INT74h : PS/2 mouse hardware interrupt -
+;------------------------------------------
+int74_handler:
+ sti
+ pusha
+ push ds ;; save DS
+ push #0x00 ;; placeholder for status
+ push #0x00 ;; placeholder for X
+ push #0x00 ;; placeholder for Y
+ push #0x00 ;; placeholder for Z
+ push #0x00 ;; placeholder for make_far_call boolean
+ call _int74_function
+ pop cx ;; remove make_far_call from stack
+ jcxz int74_done
+
+ ;; make far call to EBDA:0022
+ push #0x00
+ pop ds
+ push 0x040E ;; push 0000:040E (opcodes 0xff, 0x36, 0x0E, 0x04)
+ pop ds
+ //CALL_EP(0x0022) ;; call far routine (call_Ep DS:0022 :opcodes 0xff, 0x1e, 0x22, 0x00)
+ call far ptr[0x22]
+int74_done:
+ cli
+ call eoi_both_pics
+ add sp, #8 ;; pop status, x, y, z
+
+ pop ds ;; restore DS
+ popa
+ iret
+
+
+;; This will perform an IRET, but will retain value of current CF
+;; by altering flags on stack. Better than RETF #02.
+iret_modify_cf:
+ jc carry_set
+ push bp
+ mov bp, sp
+ and BYTE [bp + 0x06], #0xfe
+ pop bp
+ iret
+carry_set:
+ push bp
+ mov bp, sp
+ or BYTE [bp + 0x06], #0x01
+ pop bp
+ iret
+
+
+;----------------------
+;- INT13h (relocated) -
+;----------------------
+;
+; int13_relocated is a little bit messed up since I played with it
+; I have to rewrite it:
+; - call a function that detect which function to call
+; - make all called C function get the same parameters list
+;
+int13_relocated:
+
+#if BX_ELTORITO_BOOT
+ ;; check for an eltorito function
+ cmp ah,#0x4a
+ jb int13_not_eltorito
+ cmp ah,#0x4d
+ ja int13_not_eltorito
+
+ pusha
+ push es
+ push ds
+ push ss
+ pop ds
+
+ push #int13_out
+ jmp _int13_eltorito ;; ELDX not used
+
+int13_not_eltorito:
+ push ax
+ push bx
+ push cx
+ push dx
+
+ ;; check if emulation active
+ call _cdemu_isactive
+ cmp al,#0x00
+ je int13_cdemu_inactive
+
+ ;; check if access to the emulated drive
+ call _cdemu_emulated_drive
+ pop dx
+ push dx
+ cmp al,dl ;; int13 on emulated drive
+ jne int13_nocdemu
+
+ pop dx
+ pop cx
+ pop bx
+ pop ax
+
+ pusha
+ push es
+ push ds
+ push ss
+ pop ds
+
+ push #int13_out
+ jmp _int13_cdemu ;; ELDX not used
+
+int13_nocdemu:
+ and dl,#0xE0 ;; mask to get device class, including cdroms
+ cmp al,dl ;; al is 0x00 or 0x80
+ jne int13_cdemu_inactive ;; inactive for device class
+
+ pop dx
+ pop cx
+ pop bx
+ pop ax
+
+ push ax
+ push cx
+ push dx
+ push bx
+
+ dec dl ;; real drive is dl - 1
+ jmp int13_legacy
+
+int13_cdemu_inactive:
+ pop dx
+ pop cx
+ pop bx
+ pop ax
+
+#endif // BX_ELTORITO_BOOT
+
+int13_noeltorito:
+
+ push ax
+ push cx
+ push dx
+ push bx
+
+int13_legacy:
+
+ push dx ;; push eltorito value of dx instead of sp
+
+ push bp
+ push si
+ push di
+
+ push es
+ push ds
+ push ss
+ pop ds
+
+ ;; now the 16-bit registers can be restored with:
+ ;; pop ds; pop es; popa; iret
+ ;; arguments passed to functions should be
+ ;; DS, ES, DI, SI, BP, ELDX, BX, DX, CX, AX, IP, CS, FLAGS
+
+ test dl, #0x80
+ jnz int13_notfloppy
+
+ push #int13_out
+ jmp _int13_diskette_function
+
+int13_notfloppy:
+
+#if BX_USE_ATADRV
+
+ cmp dl, #0xE0
+ jb int13_notcdrom
+
+ // ebx is modified: BSD 5.2.1 boot loader problem
+ // someone should figure out which 32 bit register that actually are used
+
+ shr ebx, #16
+ push bx
+
+ call _int13_cdrom
+
+ pop bx
+ shl ebx, #16
+
+ jmp int13_out
+
+int13_notcdrom:
+
+#endif
+
+int13_disk:
+ call _int13_harddisk
+
+int13_out:
+ pop ds
+ pop es
+ popa
+ iret
+
+
+;----------
+;- INT18h -
+;----------
+int18_handler: ;; Boot Failure routing
+ call _int18_panic_msg
+ hlt
+ iret
+
+;----------
+;- INT19h -
+;----------
+int19_relocated: ;; Boot function, relocated
+
+ ;; int19 was beginning to be really complex, so now it
+ ;; just calls an C function, that does the work
+ ;; it returns in BL the boot drive, and in AX the boot segment
+ ;; the boot segment will be 0x0000 if something has failed
+
+ push bp
+ mov bp, sp
+
+ ;; drop ds
+ xor ax, ax
+ mov ds, ax
+
+ ;; 1st boot device
+ mov ax, #0x0001
+ push ax
+ call _int19_function
+ inc sp
+ inc sp
+ ;; bl contains the boot drive
+ ;; ax contains the boot segment or 0 if failure
+
+ test ax, ax ;; if ax is 0 try next boot device
+ jnz boot_setup
+
+ ;; 2nd boot device
+ mov ax, #0x0002
+ push ax
+ call _int19_function
+ inc sp
+ inc sp
+ test ax, ax ;; if ax is 0 try next boot device
+ jnz boot_setup
+
+ ;; 3rd boot device
+ mov ax, #0x0003
+ push ax
+ call _int19_function
+ inc sp
+ inc sp
+ test ax, ax ;; if ax is 0 call int18
+ jz int18_handler
+
+boot_setup:
+ mov dl, bl ;; set drive so guest os find it
+ shl eax, #0x04 ;; convert seg to ip
+ mov 2[bp], ax ;; set ip
+
+ shr eax, #0x04 ;; get cs back
+ and ax, #0xF000 ;; remove what went in ip
+ mov 4[bp], ax ;; set cs
+ xor ax, ax
+ mov es, ax ;; set es to zero fixes [ 549815 ]
+ mov [bp], ax ;; set bp to zero
+ mov ax, #0xaa55 ;; set ok flag
+
+ pop bp
+ iret ;; Beam me up Scotty
+
+;----------
+;- INT1Ch -
+;----------
+int1c_handler: ;; User Timer Tick
+ iret
+
+
+;----------------------
+;- POST: Floppy Drive -
+;----------------------
+floppy_drive_post:
+ mov ax, #0x0000
+ mov ds, ax
+
+ mov al, #0x00
+ mov 0x043e, al ;; drive 0 & 1 uncalibrated, no interrupt has occurred
+
+ mov 0x043f, al ;; diskette motor status: read op, drive0, motors off
+
+ mov 0x0440, al ;; diskette motor timeout counter: not active
+ mov 0x0441, al ;; diskette controller status return code
+
+ mov 0x0442, al ;; disk & diskette controller status register 0
+ mov 0x0443, al ;; diskette controller status register 1
+ mov 0x0444, al ;; diskette controller status register 2
+ mov 0x0445, al ;; diskette controller cylinder number
+ mov 0x0446, al ;; diskette controller head number
+ mov 0x0447, al ;; diskette controller sector number
+ mov 0x0448, al ;; diskette controller bytes written
+
+ mov 0x048b, al ;; diskette configuration data
+
+ ;; -----------------------------------------------------------------
+ ;; (048F) diskette controller information
+ ;;
+ mov al, #0x10 ;; get CMOS diskette drive type
+ out 0x70, AL
+ in AL, 0x71
+ mov ah, al ;; save byte to AH
+
+look_drive0:
+ shr al, #4 ;; look at top 4 bits for drive 0
+ jz f0_missing ;; jump if no drive0
+ mov bl, #0x07 ;; drive0 determined, multi-rate, has changed line
+ jmp look_drive1
+f0_missing:
+ mov bl, #0x00 ;; no drive0
+
+look_drive1:
+ mov al, ah ;; restore from AH
+ and al, #0x0f ;; look at bottom 4 bits for drive 1
+ jz f1_missing ;; jump if no drive1
+ or bl, #0x70 ;; drive1 determined, multi-rate, has changed line
+f1_missing:
+ ;; leave high bits in BL zerod
+ mov 0x048f, bl ;; put new val in BDA (diskette controller information)
+ ;; -----------------------------------------------------------------
+
+ mov al, #0x00
+ mov 0x0490, al ;; diskette 0 media state
+ mov 0x0491, al ;; diskette 1 media state
+
+ ;; diskette 0,1 operational starting state
+ ;; drive type has not been determined,
+ ;; has no changed detection line
+ mov 0x0492, al
+ mov 0x0493, al
+
+ mov 0x0494, al ;; diskette 0 current cylinder
+ mov 0x0495, al ;; diskette 1 current cylinder
+
+ mov al, #0x02
+ out #0x0a, al ;; clear DMA-1 channel 2 mask bit
+
+ SET_INT_VECTOR(0x1E, #0xF000, #diskette_param_table2)
+ SET_INT_VECTOR(0x40, #0xF000, #int13_diskette)
+ SET_INT_VECTOR(0x0E, #0xF000, #int0e_handler) ;; IRQ 6
+
+ ret
+
+
+;--------------------
+;- POST: HARD DRIVE -
+;--------------------
+; relocated here because the primary POST area isnt big enough.
+hard_drive_post:
+ // IRQ 14 = INT 76h
+ // INT 76h calls INT 15h function ax=9100
+
+ mov al, #0x0a ; 0000 1010 = reserved, disable IRQ 14
+ mov dx, #0x03f6
+ out dx, al
+
+ mov ax, #0x0000
+ mov ds, ax
+ mov 0x0474, al /* hard disk status of last operation */
+ mov 0x0477, al /* hard disk port offset (XT only ???) */
+ mov 0x048c, al /* hard disk status register */
+ mov 0x048d, al /* hard disk error register */
+ mov 0x048e, al /* hard disk task complete flag */
+ mov al, #0x01
+ mov 0x0475, al /* hard disk number attached */
+ mov al, #0xc0
+ mov 0x0476, al /* hard disk control byte */
+ SET_INT_VECTOR(0x13, #0xF000, #int13_handler)
+ SET_INT_VECTOR(0x76, #0xF000, #int76_handler)
+ ;; INT 41h: hard disk 0 configuration pointer
+ ;; INT 46h: hard disk 1 configuration pointer
+ SET_INT_VECTOR(0x41, #EBDA_SEG, #0x003D)
+ SET_INT_VECTOR(0x46, #EBDA_SEG, #0x004D)
+
+ ;; move disk geometry data from CMOS to EBDA disk parameter table(s)
+ mov al, #0x12
+ out #0x70, al
+ in al, #0x71
+ and al, #0xf0
+ cmp al, #0xf0
+ je post_d0_extended
+ jmp check_for_hd1
+post_d0_extended:
+ mov al, #0x19
+ out #0x70, al
+ in al, #0x71
+ cmp al, #47 ;; decimal 47 - user definable
+ je post_d0_type47
+ HALT(__LINE__)
+post_d0_type47:
+ ;; CMOS purpose param table offset
+ ;; 1b cylinders low 0
+ ;; 1c cylinders high 1
+ ;; 1d heads 2
+ ;; 1e write pre-comp low 5
+ ;; 1f write pre-comp high 6
+ ;; 20 retries/bad map/heads>8 8
+ ;; 21 landing zone low C
+ ;; 22 landing zone high D
+ ;; 23 sectors/track E
+
+ mov ax, #EBDA_SEG
+ mov ds, ax
+
+ ;;; Filling EBDA table for hard disk 0.
+ mov al, #0x1f
+ out #0x70, al
+ in al, #0x71
+ mov ah, al
+ mov al, #0x1e
+ out #0x70, al
+ in al, #0x71
+ mov (0x003d + 0x05), ax ;; write precomp word
+
+ mov al, #0x20
+ out #0x70, al
+ in al, #0x71
+ mov (0x003d + 0x08), al ;; drive control byte
+
+ mov al, #0x22
+ out #0x70, al
+ in al, #0x71
+ mov ah, al
+ mov al, #0x21
+ out #0x70, al
+ in al, #0x71
+ mov (0x003d + 0x0C), ax ;; landing zone word
+
+ mov al, #0x1c ;; get cylinders word in AX
+ out #0x70, al
+ in al, #0x71 ;; high byte
+ mov ah, al
+ mov al, #0x1b
+ out #0x70, al
+ in al, #0x71 ;; low byte
+ mov bx, ax ;; BX = cylinders
+
+ mov al, #0x1d
+ out #0x70, al
+ in al, #0x71
+ mov cl, al ;; CL = heads
+
+ mov al, #0x23
+ out #0x70, al
+ in al, #0x71
+ mov dl, al ;; DL = sectors
+
+ cmp bx, #1024
+ jnbe hd0_post_logical_chs ;; if cylinders > 1024, use translated style CHS
+
+hd0_post_physical_chs:
+ ;; no logical CHS mapping used, just physical CHS
+ ;; use Standard Fixed Disk Parameter Table (FDPT)
+ mov (0x003d + 0x00), bx ;; number of physical cylinders
+ mov (0x003d + 0x02), cl ;; number of physical heads
+ mov (0x003d + 0x0E), dl ;; number of physical sectors
+ jmp check_for_hd1
+
+hd0_post_logical_chs:
+ ;; complies with Phoenix style Translated Fixed Disk Parameter Table (FDPT)
+ mov (0x003d + 0x09), bx ;; number of physical cylinders
+ mov (0x003d + 0x0b), cl ;; number of physical heads
+ mov (0x003d + 0x04), dl ;; number of physical sectors
+ mov (0x003d + 0x0e), dl ;; number of logical sectors (same)
+ mov al, #0xa0
+ mov (0x003d + 0x03), al ;; A0h signature, indicates translated table
+
+ cmp bx, #2048
+ jnbe hd0_post_above_2048
+ ;; 1024 < c <= 2048 cylinders
+ shr bx, #0x01
+ shl cl, #0x01
+ jmp hd0_post_store_logical
+
+hd0_post_above_2048:
+ cmp bx, #4096
+ jnbe hd0_post_above_4096
+ ;; 2048 < c <= 4096 cylinders
+ shr bx, #0x02
+ shl cl, #0x02
+ jmp hd0_post_store_logical
+
+hd0_post_above_4096:
+ cmp bx, #8192
+ jnbe hd0_post_above_8192
+ ;; 4096 < c <= 8192 cylinders
+ shr bx, #0x03
+ shl cl, #0x03
+ jmp hd0_post_store_logical
+
+hd0_post_above_8192:
+ ;; 8192 < c <= 16384 cylinders
+ shr bx, #0x04
+ shl cl, #0x04
+
+hd0_post_store_logical:
+ mov (0x003d + 0x00), bx ;; number of physical cylinders
+ mov (0x003d + 0x02), cl ;; number of physical heads
+ ;; checksum
+ mov cl, #0x0f ;; repeat count
+ mov si, #0x003d ;; offset to disk0 FDPT
+ mov al, #0x00 ;; sum
+hd0_post_checksum_loop:
+ add al, [si]
+ inc si
+ dec cl
+ jnz hd0_post_checksum_loop
+ not al ;; now take 2s complement
+ inc al
+ mov [si], al
+;;; Done filling EBDA table for hard disk 0.
+
+
+check_for_hd1:
+ ;; is there really a second hard disk? if not, return now
+ mov al, #0x12
+ out #0x70, al
+ in al, #0x71
+ and al, #0x0f
+ jnz post_d1_exists
+ ret
+post_d1_exists:
+ ;; check that the hd type is really 0x0f.
+ cmp al, #0x0f
+ jz post_d1_extended
+ HALT(__LINE__)
+post_d1_extended:
+ ;; check that the extended type is 47 - user definable
+ mov al, #0x1a
+ out #0x70, al
+ in al, #0x71
+ cmp al, #47 ;; decimal 47 - user definable
+ je post_d1_type47
+ HALT(__LINE__)
+post_d1_type47:
+ ;; Table for disk1.
+ ;; CMOS purpose param table offset
+ ;; 0x24 cylinders low 0
+ ;; 0x25 cylinders high 1
+ ;; 0x26 heads 2
+ ;; 0x27 write pre-comp low 5
+ ;; 0x28 write pre-comp high 6
+ ;; 0x29 heads>8 8
+ ;; 0x2a landing zone low C
+ ;; 0x2b landing zone high D
+ ;; 0x2c sectors/track E
+;;; Fill EBDA table for hard disk 1.
+ mov ax, #EBDA_SEG
+ mov ds, ax
+ mov al, #0x28
+ out #0x70, al
+ in al, #0x71
+ mov ah, al
+ mov al, #0x27
+ out #0x70, al
+ in al, #0x71
+ mov (0x004d + 0x05), ax ;; write precomp word
+
+ mov al, #0x29
+ out #0x70, al
+ in al, #0x71
+ mov (0x004d + 0x08), al ;; drive control byte
+
+ mov al, #0x2b
+ out #0x70, al
+ in al, #0x71
+ mov ah, al
+ mov al, #0x2a
+ out #0x70, al
+ in al, #0x71
+ mov (0x004d + 0x0C), ax ;; landing zone word
+
+ mov al, #0x25 ;; get cylinders word in AX
+ out #0x70, al
+ in al, #0x71 ;; high byte
+ mov ah, al
+ mov al, #0x24
+ out #0x70, al
+ in al, #0x71 ;; low byte
+ mov bx, ax ;; BX = cylinders
+
+ mov al, #0x26
+ out #0x70, al
+ in al, #0x71
+ mov cl, al ;; CL = heads
+
+ mov al, #0x2c
+ out #0x70, al
+ in al, #0x71
+ mov dl, al ;; DL = sectors
+
+ cmp bx, #1024
+ jnbe hd1_post_logical_chs ;; if cylinders > 1024, use translated style CHS
+
+hd1_post_physical_chs:
+ ;; no logical CHS mapping used, just physical CHS
+ ;; use Standard Fixed Disk Parameter Table (FDPT)
+ mov (0x004d + 0x00), bx ;; number of physical cylinders
+ mov (0x004d + 0x02), cl ;; number of physical heads
+ mov (0x004d + 0x0E), dl ;; number of physical sectors
+ ret
+
+hd1_post_logical_chs:
+ ;; complies with Phoenix style Translated Fixed Disk Parameter Table (FDPT)
+ mov (0x004d + 0x09), bx ;; number of physical cylinders
+ mov (0x004d + 0x0b), cl ;; number of physical heads
+ mov (0x004d + 0x04), dl ;; number of physical sectors
+ mov (0x004d + 0x0e), dl ;; number of logical sectors (same)
+ mov al, #0xa0
+ mov (0x004d + 0x03), al ;; A0h signature, indicates translated table
+
+ cmp bx, #2048
+ jnbe hd1_post_above_2048
+ ;; 1024 < c <= 2048 cylinders
+ shr bx, #0x01
+ shl cl, #0x01
+ jmp hd1_post_store_logical
+
+hd1_post_above_2048:
+ cmp bx, #4096
+ jnbe hd1_post_above_4096
+ ;; 2048 < c <= 4096 cylinders
+ shr bx, #0x02
+ shl cl, #0x02
+ jmp hd1_post_store_logical
+
+hd1_post_above_4096:
+ cmp bx, #8192
+ jnbe hd1_post_above_8192
+ ;; 4096 < c <= 8192 cylinders
+ shr bx, #0x03
+ shl cl, #0x03
+ jmp hd1_post_store_logical
+
+hd1_post_above_8192:
+ ;; 8192 < c <= 16384 cylinders
+ shr bx, #0x04
+ shl cl, #0x04
+
+hd1_post_store_logical:
+ mov (0x004d + 0x00), bx ;; number of physical cylinders
+ mov (0x004d + 0x02), cl ;; number of physical heads
+ ;; checksum
+ mov cl, #0x0f ;; repeat count
+ mov si, #0x004d ;; offset to disk0 FDPT
+ mov al, #0x00 ;; sum
+hd1_post_checksum_loop:
+ add al, [si]
+ inc si
+ dec cl
+ jnz hd1_post_checksum_loop
+ not al ;; now take 2s complement
+ inc al
+ mov [si], al
+;;; Done filling EBDA table for hard disk 1.
+
+ ret
+
+;--------------------
+;- POST: EBDA segment
+;--------------------
+; relocated here because the primary POST area isnt big enough.
+ebda_post:
+#if BX_USE_EBDA
+ mov ax, #EBDA_SEG
+ mov ds, ax
+ mov byte ptr [0x0], #EBDA_SIZE
+#endif
+ xor ax, ax ; mov EBDA seg into 40E
+ mov ds, ax
+ mov word ptr [0x40E], #EBDA_SEG
+ ret;;
+
+;--------------------
+;- POST: EOI + jmp via [0x40:67)
+;--------------------
+; relocated here because the primary POST area isnt big enough.
+eoi_jmp_post:
+ call eoi_both_pics
+
+ xor ax, ax
+ mov ds, ax
+
+ jmp far ptr [0x467]
+
+
+;--------------------
+eoi_both_pics:
+ mov al, #0x20
+ out #0xA0, al ;; slave PIC EOI
+eoi_master_pic:
+ mov al, #0x20
+ out #0x20, al ;; master PIC EOI
+ ret
+
+;--------------------
+BcdToBin:
+ ;; in: AL in BCD format
+ ;; out: AL in binary format, AH will always be 0
+ ;; trashes BX
+ mov bl, al
+ and bl, #0x0f ;; bl has low digit
+ shr al, #4 ;; al has high digit
+ mov bh, #10
+ mul al, bh ;; multiply high digit by 10 (result in AX)
+ add al, bl ;; then add low digit
+ ret
+
+;--------------------
+timer_tick_post:
+ ;; Setup the Timer Ticks Count (0x46C:dword) and
+ ;; Timer Ticks Roller Flag (0x470:byte)
+ ;; The Timer Ticks Count needs to be set according to
+ ;; the current CMOS time, as if ticks have been occurring
+ ;; at 18.2hz since midnight up to this point. Calculating
+ ;; this is a little complicated. Here are the factors I gather
+ ;; regarding this. 14,318,180 hz was the original clock speed,
+ ;; chosen so it could be divided by either 3 to drive the 5Mhz CPU
+ ;; at the time, or 4 to drive the CGA video adapter. The div3
+ ;; source was divided again by 4 to feed a 1.193Mhz signal to
+ ;; the timer. With a maximum 16bit timer count, this is again
+ ;; divided down by 65536 to 18.2hz.
+ ;;
+ ;; 14,318,180 Hz clock
+ ;; /3 = 4,772,726 Hz fed to orginal 5Mhz CPU
+ ;; /4 = 1,193,181 Hz fed to timer
+ ;; /65536 (maximum timer count) = 18.20650736 ticks/second
+ ;; 1 second = 18.20650736 ticks
+ ;; 1 minute = 1092.390442 ticks
+ ;; 1 hour = 65543.42651 ticks
+ ;;
+ ;; Given the values in the CMOS clock, one could calculate
+ ;; the number of ticks by the following:
+ ;; ticks = (BcdToBin(seconds) * 18.206507) +
+ ;; (BcdToBin(minutes) * 1092.3904)
+ ;; (BcdToBin(hours) * 65543.427)
+ ;; To get a little more accuracy, since Im using integer
+ ;; arithmatic, I use:
+ ;; ticks = (BcdToBin(seconds) * 18206507) / 1000000 +
+ ;; (BcdToBin(minutes) * 10923904) / 10000 +
+ ;; (BcdToBin(hours) * 65543427) / 1000
+
+ ;; assuming DS=0000
+
+ ;; get CMOS seconds
+ xor eax, eax ;; clear EAX
+ mov al, #0x00
+ out #0x70, al
+ in al, #0x71 ;; AL has CMOS seconds in BCD
+ call BcdToBin ;; EAX now has seconds in binary
+ mov edx, #18206507
+ mul eax, edx
+ mov ebx, #1000000
+ xor edx, edx
+ div eax, ebx
+ mov ecx, eax ;; ECX will accumulate total ticks
+
+ ;; get CMOS minutes
+ xor eax, eax ;; clear EAX
+ mov al, #0x02
+ out #0x70, al
+ in al, #0x71 ;; AL has CMOS minutes in BCD
+ call BcdToBin ;; EAX now has minutes in binary
+ mov edx, #10923904
+ mul eax, edx
+ mov ebx, #10000
+ xor edx, edx
+ div eax, ebx
+ add ecx, eax ;; add to total ticks
+
+ ;; get CMOS hours
+ xor eax, eax ;; clear EAX
+ mov al, #0x04
+ out #0x70, al
+ in al, #0x71 ;; AL has CMOS hours in BCD
+ call BcdToBin ;; EAX now has hours in binary
+ mov edx, #65543427
+ mul eax, edx
+ mov ebx, #1000
+ xor edx, edx
+ div eax, ebx
+ add ecx, eax ;; add to total ticks
+
+ mov 0x46C, ecx ;; Timer Ticks Count
+ xor al, al
+ mov 0x470, al ;; Timer Ticks Rollover Flag
+ ret
+
+;--------------------
+int76_handler:
+ ;; record completion in BIOS task complete flag
+ push ax
+ push ds
+ mov ax, #0x0040
+ mov ds, ax
+ mov 0x008E, #0xff
+ call eoi_both_pics
+ pop ds
+ pop ax
+ iret
+
+
+;--------------------
+
+;--------------------
+#if BX_PCIBIOS
+use32 386
+.align 16
+bios32_structure:
+ db 0x5f, 0x33, 0x32, 0x5f ;; "_32_" signature
+ dw bios32_entry_point, 0xf ;; 32 bit physical address
+ db 0 ;; revision level
+ ;; length in paragraphs and checksum stored in a word to prevent errors
+ dw (~(((bios32_entry_point >> 8) + (bios32_entry_point & 0xff) + 0x32) \
+ & 0xff) << 8) + 0x01
+ db 0,0,0,0,0 ;; reserved
+
+.align 16
+bios32_entry_point:
+ pushf
+ cmp eax, #0x49435024 ;; "$PCI"
+ jne unknown_service
+ mov eax, #0x80000000
+ mov dx, #0x0cf8
+ out dx, eax
+ mov dx, #0x0cfc
+ in eax, dx
+#ifdef PCI_FIXED_HOST_BRIDGE
+ cmp eax, #PCI_FIXED_HOST_BRIDGE
+ jne unknown_service
+#else
+ ;; say ok if a device is present
+ cmp eax, #0xffffffff
+ je unknown_service
+#endif
+ mov ebx, #0x000f0000
+ mov ecx, #0
+ mov edx, #pcibios_protected
+ xor al, al
+ jmp bios32_end
+unknown_service:
+ mov al, #0x80
+bios32_end:
+ popf
+ retf
+
+.align 16
+pcibios_protected:
+ pushf
+ cli
+ push esi
+ push edi
+ cmp al, #0x01 ;; installation check
+ jne pci_pro_f02
+ mov bx, #0x0210
+ mov cx, #0
+ mov edx, #0x20494350 ;; "PCI "
+ mov al, #0x01
+ jmp pci_pro_ok
+pci_pro_f02: ;; find pci device
+ cmp al, #0x02
+ jne pci_pro_f08
+ shl ecx, #16
+ mov cx, dx
+ mov bx, #0x0000
+ mov di, #0x00
+pci_pro_devloop:
+ call pci_pro_select_reg
+ mov dx, #0x0cfc
+ in eax, dx
+ cmp eax, ecx
+ jne pci_pro_nextdev
+ cmp si, #0
+ je pci_pro_ok
+ dec si
+pci_pro_nextdev:
+ inc bx
+ cmp bx, #0x0100
+ jne pci_pro_devloop
+ mov ah, #0x86
+ jmp pci_pro_fail
+pci_pro_f08: ;; read configuration byte
+ cmp al, #0x08
+ jne pci_pro_f09
+ call pci_pro_select_reg
+ push edx
+ mov dx, di
+ and dx, #0x03
+ add dx, #0x0cfc
+ in al, dx
+ pop edx
+ mov cl, al
+ jmp pci_pro_ok
+pci_pro_f09: ;; read configuration word
+ cmp al, #0x09
+ jne pci_pro_f0a
+ call pci_pro_select_reg
+ push edx
+ mov dx, di
+ and dx, #0x02
+ add dx, #0x0cfc
+ in ax, dx
+ pop edx
+ mov cx, ax
+ jmp pci_pro_ok
+pci_pro_f0a: ;; read configuration dword
+ cmp al, #0x0a
+ jne pci_pro_f0b
+ call pci_pro_select_reg
+ push edx
+ mov dx, #0x0cfc
+ in eax, dx
+ pop edx
+ mov ecx, eax
+ jmp pci_pro_ok
+pci_pro_f0b: ;; write configuration byte
+ cmp al, #0x0b
+ jne pci_pro_f0c
+ call pci_pro_select_reg
+ push edx
+ mov dx, di
+ and dx, #0x03
+ add dx, #0x0cfc
+ mov al, cl
+ out dx, al
+ pop edx
+ jmp pci_pro_ok
+pci_pro_f0c: ;; write configuration word
+ cmp al, #0x0c
+ jne pci_pro_f0d
+ call pci_pro_select_reg
+ push edx
+ mov dx, di
+ and dx, #0x02
+ add dx, #0x0cfc
+ mov ax, cx
+ out dx, ax
+ pop edx
+ jmp pci_pro_ok
+pci_pro_f0d: ;; write configuration dword
+ cmp al, #0x0d
+ jne pci_pro_unknown
+ call pci_pro_select_reg
+ push edx
+ mov dx, #0x0cfc
+ mov eax, ecx
+ out dx, eax
+ pop edx
+ jmp pci_pro_ok
+pci_pro_unknown:
+ mov ah, #0x81
+pci_pro_fail:
+ pop edi
+ pop esi
+ popf
+ stc
+ retf
+pci_pro_ok:
+ xor ah, ah
+ pop edi
+ pop esi
+ popf
+ clc
+ retf
+
+pci_pro_select_reg:
+ push edx
+ mov eax, #0x800000
+ mov ax, bx
+ shl eax, #8
+ and di, #0xff
+ or ax, di
+ and al, #0xfc
+ mov dx, #0x0cf8
+ out dx, eax
+ pop edx
+ ret
+
+use16 386
+
+pcibios_real:
+ push eax
+ push dx
+ mov eax, #0x80000000
+ mov dx, #0x0cf8
+ out dx, eax
+ mov dx, #0x0cfc
+ in eax, dx
+#ifdef PCI_FIXED_HOST_BRIDGE
+ cmp eax, #PCI_FIXED_HOST_BRIDGE
+ je pci_present
+#else
+ ;; say ok if a device is present
+ cmp eax, #0xffffffff
+ jne pci_present
+#endif
+ pop dx
+ pop eax
+ mov ah, #0xff
+ stc
+ ret
+pci_present:
+ pop dx
+ pop eax
+ cmp al, #0x01 ;; installation check
+ jne pci_real_f02
+ mov ax, #0x0001
+ mov bx, #0x0210
+ mov cx, #0
+ mov edx, #0x20494350 ;; "PCI "
+ mov edi, #0xf0000
+ mov di, #pcibios_protected
+ clc
+ ret
+pci_real_f02: ;; find pci device
+ push esi
+ push edi
+ cmp al, #0x02
+ jne pci_real_f08
+ shl ecx, #16
+ mov cx, dx
+ mov bx, #0x0000
+ mov di, #0x00
+pci_real_devloop:
+ call pci_real_select_reg
+ mov dx, #0x0cfc
+ in eax, dx
+ cmp eax, ecx
+ jne pci_real_nextdev
+ cmp si, #0
+ je pci_real_ok
+ dec si
+pci_real_nextdev:
+ inc bx
+ cmp bx, #0x0100
+ jne pci_real_devloop
+ mov dx, cx
+ shr ecx, #16
+ mov ah, #0x86
+ jmp pci_real_fail
+pci_real_f08: ;; read configuration byte
+ cmp al, #0x08
+ jne pci_real_f09
+ call pci_real_select_reg
+ push dx
+ mov dx, di
+ and dx, #0x03
+ add dx, #0x0cfc
+ in al, dx
+ pop dx
+ mov cl, al
+ jmp pci_real_ok
+pci_real_f09: ;; read configuration word
+ cmp al, #0x09
+ jne pci_real_f0a
+ call pci_real_select_reg
+ push dx
+ mov dx, di
+ and dx, #0x02
+ add dx, #0x0cfc
+ in ax, dx
+ pop dx
+ mov cx, ax
+ jmp pci_real_ok
+pci_real_f0a: ;; read configuration dword
+ cmp al, #0x0a
+ jne pci_real_f0b
+ call pci_real_select_reg
+ push dx
+ mov dx, #0x0cfc
+ in eax, dx
+ pop dx
+ mov ecx, eax
+ jmp pci_real_ok
+pci_real_f0b: ;; write configuration byte
+ cmp al, #0x0b
+ jne pci_real_f0c
+ call pci_real_select_reg
+ push dx
+ mov dx, di
+ and dx, #0x03
+ add dx, #0x0cfc
+ mov al, cl
+ out dx, al
+ pop dx
+ jmp pci_real_ok
+pci_real_f0c: ;; write configuration word
+ cmp al, #0x0c
+ jne pci_real_f0d
+ call pci_real_select_reg
+ push dx
+ mov dx, di
+ and dx, #0x02
+ add dx, #0x0cfc
+ mov ax, cx
+ out dx, ax
+ pop dx
+ jmp pci_real_ok
+pci_real_f0d: ;; write configuration dword
+ cmp al, #0x0d
+ jne pci_real_f0e
+ call pci_real_select_reg
+ push dx
+ mov dx, #0x0cfc
+ mov eax, ecx
+ out dx, eax
+ pop dx
+ jmp pci_real_ok
+pci_real_f0e: ;; get irq routing options
+ cmp al, #0x0e
+ jne pci_real_unknown
+ SEG ES
+ cmp word ptr [di], #pci_routing_table_structure_end - pci_routing_table_structure_start
+ jb pci_real_too_small
+ SEG ES
+ mov word ptr [di], #pci_routing_table_structure_end - pci_routing_table_structure_start
+ pushf
+ push ds
+ push es
+ push cx
+ push si
+ push di
+ cld
+ mov si, #pci_routing_table_structure_start
+ push cs
+ pop ds
+ SEG ES
+ mov cx, [di+2]
+ SEG ES
+ mov es, [di+4]
+ mov di, cx
+ mov cx, #pci_routing_table_structure_end - pci_routing_table_structure_start
+ rep
+ movsb
+ pop di
+ pop si
+ pop cx
+ pop es
+ pop ds
+ popf
+ mov bx, #(1 << 9) | (1 << 11) ;; irq 9 and 11 are used
+ jmp pci_real_ok
+pci_real_too_small:
+ SEG ES
+ mov word ptr [di], #pci_routing_table_structure_end - pci_routing_table_structure_start
+ mov ah, #0x89
+ jmp pci_real_fail
+
+pci_real_unknown:
+ mov ah, #0x81
+pci_real_fail:
+ pop edi
+ pop esi
+ stc
+ ret
+pci_real_ok:
+ xor ah, ah
+ pop edi
+ pop esi
+ clc
+ ret
+
+pci_real_select_reg:
+ push dx
+ mov eax, #0x800000
+ mov ax, bx
+ shl eax, #8
+ and di, #0xff
+ or ax, di
+ and al, #0xfc
+ mov dx, #0x0cf8
+ out dx, eax
+ pop dx
+ ret
+
+.align 16
+pci_routing_table_structure:
+ db 0x24, 0x50, 0x49, 0x52 ;; "$PIR" signature
+ db 0, 1 ;; version
+ dw 32 + (6 * 16) ;; table size
+ db 0 ;; PCI interrupt router bus
+ db 0x08 ;; PCI interrupt router DevFunc
+ dw 0x0000 ;; PCI exclusive IRQs
+ dw 0x8086 ;; compatible PCI interrupt router vendor ID
+ dw 0x7000 ;; compatible PCI interrupt router device ID
+ dw 0,0 ;; Miniport data
+ db 0,0,0,0,0,0,0,0,0,0,0 ;; reserved
+ db 0x07 ;; checksum
+pci_routing_table_structure_start:
+ ;; first slot entry PCI-to-ISA (embedded)
+ db 0 ;; pci bus number
+ db 0x08 ;; pci device number (bit 7-3)
+ db 0x60 ;; link value INTA#: pointer into PCI2ISA config space
+ dw 0xdef8 ;; IRQ bitmap INTA#
+ db 0x61 ;; link value INTB#
+ dw 0xdef8 ;; IRQ bitmap INTB#
+ db 0x62 ;; link value INTC#
+ dw 0xdef8 ;; IRQ bitmap INTC#
+ db 0x63 ;; link value INTD#
+ dw 0xdef8 ;; IRQ bitmap INTD#
+ db 0 ;; physical slot (0 = embedded)
+ db 0 ;; reserved
+ ;; second slot entry: 1st PCI slot
+ db 0 ;; pci bus number
+ db 0x10 ;; pci device number (bit 7-3)
+ db 0x61 ;; link value INTA#
+ dw 0xdef8 ;; IRQ bitmap INTA#
+ db 0x62 ;; link value INTB#
+ dw 0xdef8 ;; IRQ bitmap INTB#
+ db 0x63 ;; link value INTC#
+ dw 0xdef8 ;; IRQ bitmap INTC#
+ db 0x60 ;; link value INTD#
+ dw 0xdef8 ;; IRQ bitmap INTD#
+ db 1 ;; physical slot (0 = embedded)
+ db 0 ;; reserved
+ ;; third slot entry: 2nd PCI slot
+ db 0 ;; pci bus number
+ db 0x18 ;; pci device number (bit 7-3)
+ db 0x62 ;; link value INTA#
+ dw 0xdef8 ;; IRQ bitmap INTA#
+ db 0x63 ;; link value INTB#
+ dw 0xdef8 ;; IRQ bitmap INTB#
+ db 0x60 ;; link value INTC#
+ dw 0xdef8 ;; IRQ bitmap INTC#
+ db 0x61 ;; link value INTD#
+ dw 0xdef8 ;; IRQ bitmap INTD#
+ db 2 ;; physical slot (0 = embedded)
+ db 0 ;; reserved
+ ;; 4th slot entry: 3rd PCI slot
+ db 0 ;; pci bus number
+ db 0x20 ;; pci device number (bit 7-3)
+ db 0x63 ;; link value INTA#
+ dw 0xdef8 ;; IRQ bitmap INTA#
+ db 0x60 ;; link value INTB#
+ dw 0xdef8 ;; IRQ bitmap INTB#
+ db 0x61 ;; link value INTC#
+ dw 0xdef8 ;; IRQ bitmap INTC#
+ db 0x62 ;; link value INTD#
+ dw 0xdef8 ;; IRQ bitmap INTD#
+ db 3 ;; physical slot (0 = embedded)
+ db 0 ;; reserved
+ ;; 5th slot entry: 4rd PCI slot
+ db 0 ;; pci bus number
+ db 0x28 ;; pci device number (bit 7-3)
+ db 0x60 ;; link value INTA#
+ dw 0xdef8 ;; IRQ bitmap INTA#
+ db 0x61 ;; link value INTB#
+ dw 0xdef8 ;; IRQ bitmap INTB#
+ db 0x62 ;; link value INTC#
+ dw 0xdef8 ;; IRQ bitmap INTC#
+ db 0x63 ;; link value INTD#
+ dw 0xdef8 ;; IRQ bitmap INTD#
+ db 4 ;; physical slot (0 = embedded)
+ db 0 ;; reserved
+ ;; 6th slot entry: 5rd PCI slot
+ db 0 ;; pci bus number
+ db 0x30 ;; pci device number (bit 7-3)
+ db 0x61 ;; link value INTA#
+ dw 0xdef8 ;; IRQ bitmap INTA#
+ db 0x62 ;; link value INTB#
+ dw 0xdef8 ;; IRQ bitmap INTB#
+ db 0x63 ;; link value INTC#
+ dw 0xdef8 ;; IRQ bitmap INTC#
+ db 0x60 ;; link value INTD#
+ dw 0xdef8 ;; IRQ bitmap INTD#
+ db 5 ;; physical slot (0 = embedded)
+ db 0 ;; reserved
+pci_routing_table_structure_end:
+
+pci_irq_list:
+ db 11, 10, 9, 5;
+
+pcibios_init_sel_reg:
+ push eax
+ mov eax, #0x800000
+ mov ax, bx
+ shl eax, #8
+ and dl, #0xfc
+ or al, dl
+ mov dx, #0x0cf8
+ out dx, eax
+ pop eax
+ ret
+
+pcibios_init_iomem_bases:
+ push bp
+ mov bp, sp
+ mov eax, #0xe0000000 ;; base for memory init
+ push eax
+ mov ax, #0xc000 ;; base for i/o init
+ push ax
+ mov ax, #0x0010 ;; start at base address #0
+ push ax
+ mov bx, #0x0008
+pci_init_io_loop1:
+ mov dl, #0x00
+ call pcibios_init_sel_reg
+ mov dx, #0x0cfc
+ in ax, dx
+ cmp ax, #0xffff
+ jz next_pci_dev
+ mov dl, #0x04 ;; disable i/o and memory space access
+ call pcibios_init_sel_reg
+ mov dx, #0x0cfc
+ in al, dx
+ and al, #0xfc
+ out dx, al
+pci_init_io_loop2:
+ mov dl, [bp-8]
+ call pcibios_init_sel_reg
+ mov dx, #0x0cfc
+ in eax, dx
+ test al, #0x01
+ jnz init_io_base
+ mov ecx, eax
+ mov eax, #0xffffffff
+ out dx, eax
+ in eax, dx
+ cmp eax, ecx
+ je next_pci_base
+ xor eax, #0xffffffff
+ mov ecx, eax
+ mov eax, [bp-4]
+ out dx, eax
+ add eax, ecx ;; calculate next free mem base
+ add eax, #0x01000000
+ and eax, #0xff000000
+ mov [bp-4], eax
+ jmp next_pci_base
+init_io_base:
+ mov cx, ax
+ mov ax, #0xffff
+ out dx, ax
+ in ax, dx
+ cmp ax, cx
+ je next_pci_base
+ xor ax, #0xfffe
+ mov cx, ax
+ mov ax, [bp-6]
+ out dx, ax
+ add ax, cx ;; calculate next free i/o base
+ add ax, #0x0100
+ and ax, #0xff00
+ mov [bp-6], ax
+next_pci_base:
+ mov al, [bp-8]
+ add al, #0x04
+ cmp al, #0x28
+ je enable_iomem_space
+ mov byte ptr[bp-8], al
+ jmp pci_init_io_loop2
+enable_iomem_space:
+ mov dl, #0x04 ;; enable i/o and memory space access if available
+ call pcibios_init_sel_reg
+ mov dx, #0x0cfc
+ in al, dx
+ or al, #0x07
+ out dx, al
+next_pci_dev:
+ mov byte ptr[bp-8], #0x10
+ inc bx
+ cmp bx, #0x0100
+ jne pci_init_io_loop1
+ mov sp, bp
+ pop bp
+ ret
+
+pcibios_init_set_elcr:
+ push ax
+ push cx
+ mov dx, #0x04d0
+ test al, #0x08
+ jz is_master_pic
+ inc dx
+ and al, #0x07
+is_master_pic:
+ mov cl, al
+ mov bl, #0x01
+ shl bl, cl
+ in al, dx
+ or al, bl
+ out dx, al
+ pop cx
+ pop ax
+ ret
+
+pcibios_init_irqs:
+ push ds
+ push bp
+ mov ax, #0xf000
+ mov ds, ax
+ mov dx, #0x04d0 ;; reset ELCR1 + ELCR2
+ mov al, #0x00
+ out dx, al
+ inc dx
+ out dx, al
+ mov si, #pci_routing_table_structure
+ mov bh, [si+8]
+ mov bl, [si+9]
+ mov dl, #0x00
+ call pcibios_init_sel_reg
+ mov dx, #0x0cfc
+ in eax, dx
+ cmp eax, [si+12] ;; check irq router
+ jne pci_init_end
+ mov dl, [si+34]
+ call pcibios_init_sel_reg
+ push bx ;; save irq router bus + devfunc
+ mov dx, #0x0cfc
+ mov ax, #0x8080
+ out dx, ax ;; reset PIRQ route control
+ inc dx
+ inc dx
+ out dx, ax
+ mov ax, [si+6]
+ sub ax, #0x20
+ shr ax, #4
+ mov cx, ax
+ add si, #0x20 ;; set pointer to 1st entry
+ mov bp, sp
+ mov ax, #pci_irq_list
+ push ax
+ xor ax, ax
+ push ax
+pci_init_irq_loop1:
+ mov bh, [si]
+ mov bl, [si+1]
+pci_init_irq_loop2:
+ mov dl, #0x00
+ call pcibios_init_sel_reg
+ mov dx, #0x0cfc
+ in ax, dx
+ cmp ax, #0xffff
+ jnz pci_test_int_pin
+ test bl, #0x07
+ jz next_pir_entry
+ jmp next_pci_func
+pci_test_int_pin:
+ mov dl, #0x3c
+ call pcibios_init_sel_reg
+ mov dx, #0x0cfd
+ in al, dx
+ and al, #0x07
+ jz next_pci_func
+ dec al ;; determine pirq reg
+ mov dl, #0x03
+ mul al, dl
+ add al, #0x02
+ xor ah, ah
+ mov bx, ax
+ mov al, [si+bx]
+ mov dl, al
+ mov bx, [bp]
+ call pcibios_init_sel_reg
+ mov dx, #0x0cfc
+ and al, #0x03
+ add dl, al
+ in al, dx
+ cmp al, #0x80
+ jb pirq_found
+ mov bx, [bp-2] ;; pci irq list pointer
+ mov al, [bx]
+ out dx, al
+ inc bx
+ mov [bp-2], bx
+ call pcibios_init_set_elcr
+pirq_found:
+ mov bh, [si]
+ mov bl, [si+1]
+ add bl, [bp-3] ;; pci function number
+ mov dl, #0x3c
+ call pcibios_init_sel_reg
+ mov dx, #0x0cfc
+ out dx, al
+next_pci_func:
+ inc byte ptr[bp-3]
+ inc bl
+ test bl, #0x07
+ jnz pci_init_irq_loop2
+next_pir_entry:
+ add si, #0x10
+ mov byte ptr[bp-3], #0x00
+ loop pci_init_irq_loop1
+ mov sp, bp
+ pop bx
+pci_init_end:
+ pop bp
+ pop ds
+ ret
+#endif // BX_PCIBIOS
+
+; parallel port detection: base address in DX, index in BX, timeout in CL
+detect_parport:
+ push dx
+ add dx, #2
+ in al, dx
+ and al, #0xdf ; clear input mode
+ out dx, al
+ pop dx
+ mov al, #0xaa
+ out dx, al
+ in al, dx
+ cmp al, #0xaa
+ jne no_parport
+ push bx
+ shl bx, #1
+ mov [bx+0x408], dx ; Parallel I/O address
+ pop bx
+ mov [bx+0x478], cl ; Parallel printer timeout
+ inc bx
+no_parport:
+ ret
+
+; serial port detection: base address in DX, index in BX, timeout in CL
+detect_serial:
+ push dx
+ inc dx
+ mov al, #0x02
+ out dx, al
+ in al, dx
+ cmp al, #0x02
+ jne no_serial
+ inc dx
+ in al, dx
+ cmp al, #0x02
+ jne no_serial
+ dec dx
+ xor al, al
+ out dx, al
+ pop dx
+ push bx
+ shl bx, #1
+ mov [bx+0x400], dx ; Serial I/O address
+ pop bx
+ mov [bx+0x47c], cl ; Serial timeout
+ inc bx
+ ret
+no_serial:
+ pop dx
+ ret
+
+rom_checksum:
+ push ax
+ push bx
+ push cx
+ xor ax, ax
+ xor bx, bx
+ xor cx, cx
+ mov ch, [2]
+ shl cx, #1
+checksum_loop:
+ add al, [bx]
+ inc bx
+ loop checksum_loop
+ and al, #0xff
+ pop cx
+ pop bx
+ pop ax
+ ret
+
+rom_scan:
+ ;; Scan for existence of valid expansion ROMS.
+ ;; Video ROM: from 0xC0000..0xC7FFF in 2k increments
+ ;; General ROM: from 0xC8000..0xDFFFF in 2k increments
+ ;; System ROM: only 0xE0000
+ ;;
+ ;; Header:
+ ;; Offset Value
+ ;; 0 0x55
+ ;; 1 0xAA
+ ;; 2 ROM length in 512-byte blocks
+ ;; 3 ROM initialization entry point (FAR CALL)
+
+ mov cx, #0xc000
+rom_scan_loop:
+ mov ds, cx
+ mov ax, #0x0004 ;; start with increment of 4 (512-byte) blocks = 2k
+ cmp [0], #0xAA55 ;; look for signature
+ jne rom_scan_increment
+ call rom_checksum
+ jnz rom_scan_increment
+ mov al, [2] ;; change increment to ROM length in 512-byte blocks
+
+ ;; We want our increment in 512-byte quantities, rounded to
+ ;; the nearest 2k quantity, since we only scan at 2k intervals.
+ test al, #0x03
+ jz block_count_rounded
+ and al, #0xfc ;; needs rounding up
+ add al, #0x04
+block_count_rounded:
+
+ xor bx, bx ;; Restore DS back to 0000:
+ mov ds, bx
+ push ax ;; Save AX
+ ;; Push addr of ROM entry point
+ push cx ;; Push seg
+ push #0x0003 ;; Push offset
+ mov bp, sp ;; Call ROM init routine using seg:off on stack
+ db 0xff ;; call_far ss:[bp+0]
+ db 0x5e
+ db 0
+ cli ;; In case expansion ROM BIOS turns IF on
+ add sp, #2 ;; Pop offset value
+ pop cx ;; Pop seg value (restore CX)
+ pop ax ;; Restore AX
+rom_scan_increment:
+ shl ax, #5 ;; convert 512-bytes blocks to 16-byte increments
+ ;; because the segment selector is shifted left 4 bits.
+ add cx, ax
+ cmp cx, #0xe000
+ jbe rom_scan_loop
+
+ xor ax, ax ;; Restore DS back to 0000:
+ mov ds, ax
+ ret
+
+;; for 'C' strings and other data, insert them here with
+;; a the following hack:
+;; DATA_SEG_DEFS_HERE
+
+
+;--------
+;- POST -
+;--------
+.org 0xe05b ; POST Entry Point
+post:
+
+ xor ax, ax
+
+ ;; first reset the DMA controllers
+ out 0x0d,al
+ out 0xda,al
+
+ ;; then initialize the DMA controllers
+ mov al, #0xC0
+ out 0xD6, al ; cascade mode of channel 4 enabled
+ mov al, #0x00
+ out 0xD4, al ; unmask channel 4
+
+ ;; Examine CMOS shutdown status.
+ mov AL, #0x0f
+ out 0x70, AL
+ in AL, 0x71
+
+ ;; backup status
+ mov bl, al
+
+ ;; Reset CMOS shutdown status.
+ mov AL, #0x0f
+ out 0x70, AL ; select CMOS register Fh
+ mov AL, #0x00
+ out 0x71, AL ; set shutdown action to normal
+
+ ;; Examine CMOS shutdown status.
+ mov al, bl
+
+ ;; 0x00, 0x09, 0x0D+ = normal startup
+ cmp AL, #0x00
+ jz normal_post
+ cmp AL, #0x0d
+ jae normal_post
+ cmp AL, #0x09
+ je normal_post
+
+ ;; 0x05 = eoi + jmp via [0x40:0x67] jump
+ cmp al, #0x05
+ je eoi_jmp_post
+
+ ;; Examine CMOS shutdown status.
+ ;; 0x01,0x02,0x03,0x04,0x06,0x07,0x08, 0x0a, 0x0b, 0x0c = Unimplemented shutdown status.
+ push bx
+ call _shutdown_status_panic
+
+#if 0
+ HALT(__LINE__)
+ ;
+ ;#if 0
+ ; 0xb0, 0x20, /* mov al, #0x20 */
+ ; 0xe6, 0x20, /* out 0x20, al ;send EOI to PIC */
+ ;#endif
+ ;
+ pop es
+ pop ds
+ popa
+ iret
+#endif
+
+normal_post:
+ ; case 0: normal startup
+
+ cli
+ mov ax, #0xfffe
+ mov sp, ax
+ mov ax, #0x0000
+ mov ds, ax
+ mov ss, ax
+
+ ;; zero out BIOS data area (40:00..40:ff)
+ mov es, ax
+ mov cx, #0x0080 ;; 128 words
+ mov di, #0x0400
+ cld
+ rep
+ stosw
+
+ call _log_bios_start
+
+ ;; set all interrupts to default handler
+ mov bx, #0x0000 ;; offset index
+ mov cx, #0x0100 ;; counter (256 interrupts)
+ mov ax, #dummy_iret_handler
+ mov dx, #0xF000
+
+post_default_ints:
+ mov [bx], ax
+ inc bx
+ inc bx
+ mov [bx], dx
+ inc bx
+ inc bx
+ loop post_default_ints
+
+ ;; set vector 0x79 to zero
+ ;; this is used by 'gardian angel' protection system
+ SET_INT_VECTOR(0x79, #0, #0)
+
+ ;; base memory in K 40:13 (word)
+ mov ax, #BASE_MEM_IN_K
+ mov 0x0413, ax
+
+
+ ;; Manufacturing Test 40:12
+ ;; zerod out above
+
+ ;; Warm Boot Flag 0040:0072
+ ;; value of 1234h = skip memory checks
+ ;; zerod out above
+
+
+ ;; Printer Services vector
+ SET_INT_VECTOR(0x17, #0xF000, #int17_handler)
+
+ ;; Bootstrap failure vector
+ SET_INT_VECTOR(0x18, #0xF000, #int18_handler)
+
+ ;; Bootstrap Loader vector
+ SET_INT_VECTOR(0x19, #0xF000, #int19_handler)
+
+ ;; User Timer Tick vector
+ SET_INT_VECTOR(0x1c, #0xF000, #int1c_handler)
+
+ ;; Memory Size Check vector
+ SET_INT_VECTOR(0x12, #0xF000, #int12_handler)
+
+ ;; Equipment Configuration Check vector
+ SET_INT_VECTOR(0x11, #0xF000, #int11_handler)
+
+ ;; System Services
+ SET_INT_VECTOR(0x15, #0xF000, #int15_handler)
+
+ ;; EBDA setup
+ call ebda_post
+
+ ;; PIT setup
+ SET_INT_VECTOR(0x08, #0xF000, #int08_handler)
+ ;; int 1C already points at dummy_iret_handler (above)
+ mov al, #0x34 ; timer0: binary count, 16bit count, mode 2
+ out 0x43, al
+ mov al, #0x00 ; maximum count of 0000H = 18.2Hz
+ out 0x40, al
+ out 0x40, al
+
+ ;; Keyboard
+ SET_INT_VECTOR(0x09, #0xF000, #int09_handler)
+ SET_INT_VECTOR(0x16, #0xF000, #int16_handler)
+
+ xor ax, ax
+ mov ds, ax
+ mov 0x0417, al /* keyboard shift flags, set 1 */
+ mov 0x0418, al /* keyboard shift flags, set 2 */
+ mov 0x0419, al /* keyboard alt-numpad work area */
+ mov 0x0471, al /* keyboard ctrl-break flag */
+ mov 0x0497, al /* keyboard status flags 4 */
+ mov al, #0x10
+ mov 0x0496, al /* keyboard status flags 3 */
+
+
+ /* keyboard head of buffer pointer */
+ mov bx, #0x001E
+ mov 0x041A, bx
+
+ /* keyboard end of buffer pointer */
+ mov 0x041C, bx
+
+ /* keyboard pointer to start of buffer */
+ mov bx, #0x001E
+ mov 0x0480, bx
+
+ /* keyboard pointer to end of buffer */
+ mov bx, #0x003E
+ mov 0x0482, bx
+
+ /* init the keyboard */
+ call _keyboard_init
+
+ ;; mov CMOS Equipment Byte to BDA Equipment Word
+ mov ax, 0x0410
+ mov al, #0x14
+ out 0x70, al
+ in al, 0x71
+ mov 0x0410, ax
+
+
+ ;; Parallel setup
+ SET_INT_VECTOR(0x0F, #0xF000, #dummy_iret_handler)
+ xor ax, ax
+ mov ds, ax
+ xor bx, bx
+ mov cl, #0x14 ; timeout value
+ mov dx, #0x378 ; Parallel I/O address, port 1
+ call detect_parport
+ mov dx, #0x278 ; Parallel I/O address, port 2
+ call detect_parport
+ shl bx, #0x0e
+ mov ax, 0x410 ; Equipment word bits 14..15 determing # parallel ports
+ and ax, #0x3fff
+ or ax, bx ; set number of parallel ports
+ mov 0x410, ax
+
+ ;; Serial setup
+ SET_INT_VECTOR(0x0C, #0xF000, #dummy_iret_handler)
+ SET_INT_VECTOR(0x14, #0xF000, #int14_handler)
+ xor bx, bx
+ mov cl, #0x0a ; timeout value
+ mov dx, #0x03f8 ; Serial I/O address, port 1
+ call detect_serial
+ mov dx, #0x02f8 ; Serial I/O address, port 2
+ call detect_serial
+ mov dx, #0x03e8 ; Serial I/O address, port 3
+ call detect_serial
+ mov dx, #0x02e8 ; Serial I/O address, port 4
+ call detect_serial
+ shl bx, #0x09
+ mov ax, 0x410 ; Equipment word bits 9..11 determing # serial ports
+ and ax, #0xf1ff
+ or ax, bx ; set number of serial port
+ mov 0x410, ax
+
+ ;; CMOS RTC
+ SET_INT_VECTOR(0x1A, #0xF000, #int1a_handler)
+ SET_INT_VECTOR(0x4A, #0xF000, #dummy_iret_handler)
+ SET_INT_VECTOR(0x70, #0xF000, #int70_handler)
+ ;; BIOS DATA AREA 0x4CE ???
+ call timer_tick_post
+
+ ;; PS/2 mouse setup
+ SET_INT_VECTOR(0x74, #0xF000, #int74_handler)
+
+ ;; IRQ13 (FPU exception) setup
+ SET_INT_VECTOR(0x75, #0xF000, #int75_handler)
+
+ ;; Video setup
+ SET_INT_VECTOR(0x10, #0xF000, #int10_handler)
+
+ ;; PIC
+ mov al, #0x11 ; send initialisation commands
+ out 0x20, al
+ out 0xa0, al
+ mov al, #0x08
+ out 0x21, al
+ mov al, #0x70
+ out 0xa1, al
+ mov al, #0x04
+ out 0x21, al
+ mov al, #0x02
+ out 0xa1, al
+ mov al, #0x01
+ out 0x21, al
+ out 0xa1, al
+ mov al, #0xb8
+ out 0x21, AL ;master pic: unmask IRQ 0, 1, 2, 6
+#if BX_USE_PS2_MOUSE
+ mov al, #0x8f
+#else
+ mov al, #0x9f
+#endif
+ out 0xa1, AL ;slave pic: unmask IRQ 12, 13, 14
+
+#if BX_PCIBIOS
+ call pcibios_init_iomem_bases
+ call pcibios_init_irqs
+#endif
+
+ call rom_scan
+
+ call _print_bios_banner
+
+ ;;
+ ;; Floppy setup
+ ;;
+ call floppy_drive_post
+
+#if BX_USE_ATADRV
+
+ ;;
+ ;; Hard Drive setup
+ ;;
+ call hard_drive_post
+
+ ;;
+ ;; ATA/ATAPI driver setup
+ ;;
+ call _ata_init
+ call _ata_detect
+ ;;
+#else // BX_USE_ATADRV
+
+ ;;
+ ;; Hard Drive setup
+ ;;
+ call hard_drive_post
+
+#endif // BX_USE_ATADRV
+
+#if BX_ELTORITO_BOOT
+ ;;
+ ;; eltorito floppy/harddisk emulation from cd
+ ;;
+ call _cdemu_init
+ ;;
+#endif // BX_ELTORITO_BOOT
+
+ sti ;; enable interrupts
+ int #0x19
+
+
+.org 0xe2c3 ; NMI Handler Entry Point
+nmi:
+ ;; FIXME the NMI handler should not panic
+ ;; but iret when called from int75 (fpu exception)
+ call _nmi_handler_msg
+ iret
+
+int75_handler:
+ out 0xf0, al // clear irq13
+ call eoi_both_pics // clear interrupt
+ int 2 // legacy nmi call
+ iret
+
+;-------------------------------------------
+;- INT 13h Fixed Disk Services Entry Point -
+;-------------------------------------------
+.org 0xe3fe ; INT 13h Fixed Disk Services Entry Point
+int13_handler:
+ //JMPL(int13_relocated)
+ jmp int13_relocated
+
+.org 0xe401 ; Fixed Disk Parameter Table
+
+;----------
+;- INT19h -
+;----------
+.org 0xe6f2 ; INT 19h Boot Load Service Entry Point
+int19_handler:
+
+ jmp int19_relocated
+;-------------------------------------------
+;- System BIOS Configuration Data Table
+;-------------------------------------------
+.org BIOS_CONFIG_TABLE
+db 0x08 ; Table size (bytes) -Lo
+db 0x00 ; Table size (bytes) -Hi
+db SYS_MODEL_ID
+db SYS_SUBMODEL_ID
+db BIOS_REVISION
+; Feature byte 1
+; b7: 1=DMA channel 3 used by hard disk
+; b6: 1=2 interrupt controllers present
+; b5: 1=RTC present
+; b4: 1=BIOS calls int 15h/4Fh every key
+; b3: 1=wait for extern event supported (Int 15h/41h)
+; b2: 1=extended BIOS data area used
+; b1: 0=AT or ESDI bus, 1=MicroChannel
+; b0: 1=Dual bus (MicroChannel + ISA)
+db (0 << 7) | \
+ (1 << 6) | \
+ (1 << 5) | \
+ (BX_CALL_INT15_4F << 4) | \
+ (0 << 3) | \
+ (BX_USE_EBDA << 2) | \
+ (0 << 1) | \
+ (0 << 0)
+; Feature byte 2
+; b7: 1=32-bit DMA supported
+; b6: 1=int16h, function 9 supported
+; b5: 1=int15h/C6h (get POS data) supported
+; b4: 1=int15h/C7h (get mem map info) supported
+; b3: 1=int15h/C8h (en/dis CPU) supported
+; b2: 1=non-8042 kb controller
+; b1: 1=data streaming supported
+; b0: reserved
+db (0 << 7) | \
+ (1 << 6) | \
+ (0 << 5) | \
+ (0 << 4) | \
+ (0 << 3) | \
+ (0 << 2) | \
+ (0 << 1) | \
+ (0 << 0)
+; Feature byte 3
+; b7: not used
+; b6: reserved
+; b5: reserved
+; b4: POST supports ROM-to-RAM enable/disable
+; b3: SCSI on system board
+; b2: info panel installed
+; b1: Initial Machine Load (IML) system - BIOS on disk
+; b0: SCSI supported in IML
+db 0x00
+; Feature byte 4
+; b7: IBM private
+; b6: EEPROM present
+; b5-3: ABIOS presence (011 = not supported)
+; b2: private
+; b1: memory split above 16Mb supported
+; b0: POSTEXT directly supported by POST
+db 0x00
+; Feature byte 5 (IBM)
+; b1: enhanced mouse
+; b0: flash EPROM
+db 0x00
+
+
+
+.org 0xe729 ; Baud Rate Generator Table
+
+;----------
+;- INT14h -
+;----------
+.org 0xe739 ; INT 14h Serial Communications Service Entry Point
+int14_handler:
+ push ds
+ pusha
+ mov ax, #0x0000
+ mov ds, ax
+ call _int14_function
+ popa
+ pop ds
+ iret
+
+
+;----------------------------------------
+;- INT 16h Keyboard Service Entry Point -
+;----------------------------------------
+.org 0xe82e
+int16_handler:
+
+ sti
+ push ds
+ pushf
+ pusha
+
+ cmp ah, #0x00
+ je int16_F00
+ cmp ah, #0x10
+ je int16_F00
+
+ mov bx, #0xf000
+ mov ds, bx
+ call _int16_function
+ popa
+ popf
+ pop ds
+ jz int16_zero_set
+
+int16_zero_clear:
+ push bp
+ mov bp, sp
+ //SEG SS
+ and BYTE [bp + 0x06], #0xbf
+ pop bp
+ iret
+
+int16_zero_set:
+ push bp
+ mov bp, sp
+ //SEG SS
+ or BYTE [bp + 0x06], #0x40
+ pop bp
+ iret
+
+int16_F00:
+ mov bx, #0x0040
+ mov ds, bx
+
+int16_wait_for_key:
+ cli
+ mov bx, 0x001a
+ cmp bx, 0x001c
+ jne int16_key_found
+ sti
+ nop
+#if 0
+ /* no key yet, call int 15h, function AX=9002 */
+ 0x50, /* push AX */
+ 0xb8, 0x02, 0x90, /* mov AX, #0x9002 */
+ 0xcd, 0x15, /* int 15h */
+ 0x58, /* pop AX */
+ 0xeb, 0xea, /* jmp WAIT_FOR_KEY */
+#endif
+ jmp int16_wait_for_key
+
+int16_key_found:
+ mov bx, #0xf000
+ mov ds, bx
+ call _int16_function
+ popa
+ popf
+ pop ds
+#if 0
+ /* notify int16 complete w/ int 15h, function AX=9102 */
+ 0x50, /* push AX */
+ 0xb8, 0x02, 0x91, /* mov AX, #0x9102 */
+ 0xcd, 0x15, /* int 15h */
+ 0x58, /* pop AX */
+#endif
+ iret
+
+
+
+;-------------------------------------------------
+;- INT09h : Keyboard Hardware Service Entry Point -
+;-------------------------------------------------
+.org 0xe987
+int09_handler:
+ cli
+ push ax
+
+ mov al, #0xAD ;;disable keyboard
+ out #0x64, al
+
+ mov al, #0x0B
+ out #0x20, al
+ in al, #0x20
+ and al, #0x02
+ jz int09_finish
+
+ in al, #0x60 ;;read key from keyboard controller
+ sti
+ push ds
+ pusha
+#ifdef BX_CALL_INT15_4F
+ mov ah, #0x4f ;; allow for keyboard intercept
+ stc
+ int #0x15
+ jnc int09_done
+#endif
+
+ ;; check for extended key
+ cmp al, #0xe0
+ jne int09_check_pause
+ xor ax, ax
+ mov ds, ax
+ mov al, BYTE [0x496] ;; mf2_state |= 0x02
+ or al, #0x02
+ mov BYTE [0x496], al
+ jmp int09_done
+
+int09_check_pause: ;; check for pause key
+ cmp al, #0xe1
+ jne int09_process_key
+ xor ax, ax
+ mov ds, ax
+ mov al, BYTE [0x496] ;; mf2_state |= 0x01
+ or al, #0x01
+ mov BYTE [0x496], al
+ jmp int09_done
+
+int09_process_key:
+ mov bx, #0xf000
+ mov ds, bx
+ call _int09_function
+
+int09_done:
+ popa
+ pop ds
+ cli
+ call eoi_master_pic
+
+int09_finish:
+ mov al, #0xAE ;;enable keyboard
+ out #0x64, al
+ pop ax
+ iret
+
+
+;----------------------------------------
+;- INT 13h Diskette Service Entry Point -
+;----------------------------------------
+.org 0xec59
+int13_diskette:
+ jmp int13_noeltorito
+
+;---------------------------------------------
+;- INT 0Eh Diskette Hardware ISR Entry Point -
+;---------------------------------------------
+.org 0xef57 ; INT 0Eh Diskette Hardware ISR Entry Point
+int0e_handler:
+ push ax
+ push dx
+ mov dx, #0x03f4
+ in al, dx
+ and al, #0xc0
+ cmp al, #0xc0
+ je int0e_normal
+ mov dx, #0x03f5
+ mov al, #0x08 ; sense interrupt status
+ out dx, al
+int0e_loop1:
+ mov dx, #0x03f4
+ in al, dx
+ and al, #0xc0
+ cmp al, #0xc0
+ jne int0e_loop1
+int0e_loop2:
+ mov dx, #0x03f5
+ in al, dx
+ mov dx, #0x03f4
+ in al, dx
+ and al, #0xc0
+ cmp al, #0xc0
+ je int0e_loop2
+int0e_normal:
+ push ds
+ mov ax, #0x0000 ;; segment 0000
+ mov ds, ax
+ call eoi_master_pic
+ mov al, 0x043e
+ or al, #0x80 ;; diskette interrupt has occurred
+ mov 0x043e, al
+ pop ds
+ pop dx
+ pop ax
+ iret
+
+
+.org 0xefc7 ; Diskette Controller Parameter Table
+diskette_param_table:
+;; Since no provisions are made for multiple drive types, most
+;; values in this table are ignored. I set parameters for 1.44M
+;; floppy here
+db 0xAF
+db 0x02 ;; head load time 0000001, DMA used
+db 0x25
+db 0x02
+db 18
+db 0x1B
+db 0xFF
+db 0x6C
+db 0xF6
+db 0x0F
+db 0x08
+
+
+;----------------------------------------
+;- INT17h : Printer Service Entry Point -
+;----------------------------------------
+.org 0xefd2
+int17_handler:
+ push ds
+ pusha
+ mov ax, #0x0000
+ mov ds, ax
+ call _int17_function
+ popa
+ pop ds
+ iret
+
+diskette_param_table2:
+;; New diskette parameter table adding 3 parameters from IBM
+;; Since no provisions are made for multiple drive types, most
+;; values in this table are ignored. I set parameters for 1.44M
+;; floppy here
+db 0xAF
+db 0x02 ;; head load time 0000001, DMA used
+db 0x25
+db 0x02
+db 18
+db 0x1B
+db 0xFF
+db 0x6C
+db 0xF6
+db 0x0F
+db 0x08
+db 79 ;; maximum track
+db 0 ;; data transfer rate
+db 4 ;; drive type in cmos
+
+.org 0xf045 ; INT 10 Functions 0-Fh Entry Point
+ HALT(__LINE__)
+ iret
+
+;----------
+;- INT10h -
+;----------
+.org 0xf065 ; INT 10h Video Support Service Entry Point
+int10_handler:
+ ;; dont do anything, since the VGA BIOS handles int10h requests
+ iret
+
+.org 0xf0a4 ; MDA/CGA Video Parameter Table (INT 1Dh)
+
+;----------
+;- INT12h -
+;----------
+.org 0xf841 ; INT 12h Memory Size Service Entry Point
+; ??? different for Pentium (machine check)?
+int12_handler:
+ push ds
+ mov ax, #0x0040
+ mov ds, ax
+ mov ax, 0x0013
+ pop ds
+ iret
+
+;----------
+;- INT11h -
+;----------
+.org 0xf84d ; INT 11h Equipment List Service Entry Point
+int11_handler:
+ push ds
+ mov ax, #0x0040
+ mov ds, ax
+ mov ax, 0x0010
+ pop ds
+ iret
+
+;----------
+;- INT15h -
+;----------
+.org 0xf859 ; INT 15h System Services Entry Point
+int15_handler:
+ pushf
+ push ds
+ push es
+ cmp ah, #0x86
+ je int15_handler32
+ cmp ah, #0xE8
+ je int15_handler32
+ pusha
+#if BX_USE_PS2_MOUSE
+ cmp ah, #0xC2
+ je int15_handler_mouse
+#endif
+ call _int15_function
+int15_handler_mouse_ret:
+ popa
+int15_handler32_ret:
+ pop es
+ pop ds
+ popf
+ jmp iret_modify_cf
+
+#if BX_USE_PS2_MOUSE
+int15_handler_mouse:
+ call _int15_function_mouse
+ jmp int15_handler_mouse_ret
+#endif
+
+int15_handler32:
+ pushad
+ call _int15_function32
+ popad
+ jmp int15_handler32_ret
+
+;; Protected mode IDT descriptor
+;;
+;; I just make the limit 0, so the machine will shutdown
+;; if an exception occurs during protected mode memory
+;; transfers.
+;;
+;; Set base to f0000 to correspond to beginning of BIOS,
+;; in case I actually define an IDT later
+;; Set limit to 0
+
+pmode_IDT_info:
+dw 0x0000 ;; limit 15:00
+dw 0x0000 ;; base 15:00
+db 0x0f ;; base 23:16
+
+;; Real mode IDT descriptor
+;;
+;; Set to typical real-mode values.
+;; base = 000000
+;; limit = 03ff
+
+rmode_IDT_info:
+dw 0x03ff ;; limit 15:00
+dw 0x0000 ;; base 15:00
+db 0x00 ;; base 23:16
+
+
+;----------
+;- INT1Ah -
+;----------
+.org 0xfe6e ; INT 1Ah Time-of-day Service Entry Point
+int1a_handler:
+#if BX_PCIBIOS
+ cmp ah, #0xb1
+ jne int1a_normal
+ call pcibios_real
+ jc pcibios_error
+ retf 2
+pcibios_error:
+ mov bl, ah
+ mov ah, #0xb1
+ push ds
+ pusha
+ mov ax, ss ; set readable descriptor to ds, for calling pcibios
+ mov ds, ax ; on 16bit protected mode.
+ jmp int1a_callfunction
+int1a_normal:
+#endif
+ push ds
+ pusha
+ xor ax, ax
+ mov ds, ax
+int1a_callfunction:
+ call _int1a_function
+ popa
+ pop ds
+ iret
+
+;;
+;; int70h: IRQ8 - CMOS RTC
+;;
+int70_handler:
+ push ds
+ pushad
+ xor ax, ax
+ mov ds, ax
+ call _int70_function
+ popad
+ pop ds
+ iret
+
+;---------
+;- INT08 -
+;---------
+.org 0xfea5 ; INT 08h System Timer ISR Entry Point
+int08_handler:
+ sti
+ push eax
+ push ds
+ xor ax, ax
+ mov ds, ax
+
+ ;; time to turn off drive(s)?
+ mov al,0x0440
+ or al,al
+ jz int08_floppy_off
+ dec al
+ mov 0x0440,al
+ jnz int08_floppy_off
+ ;; turn motor(s) off
+ push dx
+ mov dx,#0x03f2
+ in al,dx
+ and al,#0xcf
+ out dx,al
+ pop dx
+int08_floppy_off:
+
+ mov eax, 0x046c ;; get ticks dword
+ inc eax
+
+ ;; compare eax to one days worth of timer ticks at 18.2 hz
+ cmp eax, #0x001800B0
+ jb int08_store_ticks
+ ;; there has been a midnight rollover at this point
+ xor eax, eax ;; zero out counter
+ inc BYTE 0x0470 ;; increment rollover flag
+
+int08_store_ticks:
+ mov 0x046c, eax ;; store new ticks dword
+ ;; chain to user timer tick INT #0x1c
+ //pushf
+ //;; call_ep [ds:loc]
+ //CALL_EP( 0x1c << 2 )
+ int #0x1c
+ cli
+ call eoi_master_pic
+ pop ds
+ pop eax
+ iret
+
+.org 0xfef3 ; Initial Interrupt Vector Offsets Loaded by POST
+
+
+.org 0xff00
+.ascii BIOS_COPYRIGHT_STRING
+
+;------------------------------------------------
+;- IRET Instruction for Dummy Interrupt Handler -
+;------------------------------------------------
+.org 0xff53 ; IRET Instruction for Dummy Interrupt Handler
+dummy_iret_handler:
+ iret
+
+.org 0xff54 ; INT 05h Print Screen Service Entry Point
+ HALT(__LINE__)
+ iret
+
+.org 0xfff0 ; Power-up Entry Point
+ jmp 0xf000:post
+
+.org 0xfff5 ; ASCII Date ROM was built - 8 characters in MM/DD/YY
+.ascii BIOS_BUILD_DATE
+
+.org 0xfffe ; System Model ID
+db SYS_MODEL_ID
+db 0x00 ; filler
+
+.org 0xfa6e ;; Character Font for 320x200 & 640x200 Graphics (lower 128 characters)
+ASM_END
+/*
+ * This font comes from the fntcol16.zip package (c) by Joseph Gil
+ * found at ftp://ftp.simtel.net/pub/simtelnet/msdos/screen/fntcol16.zip
+ * This font is public domain
+ */
+static Bit8u vgafont8[128*8]=
+{
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x7e, 0x81, 0xa5, 0x81, 0xbd, 0x99, 0x81, 0x7e,
+ 0x7e, 0xff, 0xdb, 0xff, 0xc3, 0xe7, 0xff, 0x7e,
+ 0x6c, 0xfe, 0xfe, 0xfe, 0x7c, 0x38, 0x10, 0x00,
+ 0x10, 0x38, 0x7c, 0xfe, 0x7c, 0x38, 0x10, 0x00,
+ 0x38, 0x7c, 0x38, 0xfe, 0xfe, 0x7c, 0x38, 0x7c,
+ 0x10, 0x10, 0x38, 0x7c, 0xfe, 0x7c, 0x38, 0x7c,
+ 0x00, 0x00, 0x18, 0x3c, 0x3c, 0x18, 0x00, 0x00,
+ 0xff, 0xff, 0xe7, 0xc3, 0xc3, 0xe7, 0xff, 0xff,
+ 0x00, 0x3c, 0x66, 0x42, 0x42, 0x66, 0x3c, 0x00,
+ 0xff, 0xc3, 0x99, 0xbd, 0xbd, 0x99, 0xc3, 0xff,
+ 0x0f, 0x07, 0x0f, 0x7d, 0xcc, 0xcc, 0xcc, 0x78,
+ 0x3c, 0x66, 0x66, 0x66, 0x3c, 0x18, 0x7e, 0x18,
+ 0x3f, 0x33, 0x3f, 0x30, 0x30, 0x70, 0xf0, 0xe0,
+ 0x7f, 0x63, 0x7f, 0x63, 0x63, 0x67, 0xe6, 0xc0,
+ 0x99, 0x5a, 0x3c, 0xe7, 0xe7, 0x3c, 0x5a, 0x99,
+ 0x80, 0xe0, 0xf8, 0xfe, 0xf8, 0xe0, 0x80, 0x00,
+ 0x02, 0x0e, 0x3e, 0xfe, 0x3e, 0x0e, 0x02, 0x00,
+ 0x18, 0x3c, 0x7e, 0x18, 0x18, 0x7e, 0x3c, 0x18,
+ 0x66, 0x66, 0x66, 0x66, 0x66, 0x00, 0x66, 0x00,
+ 0x7f, 0xdb, 0xdb, 0x7b, 0x1b, 0x1b, 0x1b, 0x00,
+ 0x3e, 0x63, 0x38, 0x6c, 0x6c, 0x38, 0xcc, 0x78,
+ 0x00, 0x00, 0x00, 0x00, 0x7e, 0x7e, 0x7e, 0x00,
+ 0x18, 0x3c, 0x7e, 0x18, 0x7e, 0x3c, 0x18, 0xff,
+ 0x18, 0x3c, 0x7e, 0x18, 0x18, 0x18, 0x18, 0x00,
+ 0x18, 0x18, 0x18, 0x18, 0x7e, 0x3c, 0x18, 0x00,
+ 0x00, 0x18, 0x0c, 0xfe, 0x0c, 0x18, 0x00, 0x00,
+ 0x00, 0x30, 0x60, 0xfe, 0x60, 0x30, 0x00, 0x00,
+ 0x00, 0x00, 0xc0, 0xc0, 0xc0, 0xfe, 0x00, 0x00,
+ 0x00, 0x24, 0x66, 0xff, 0x66, 0x24, 0x00, 0x00,
+ 0x00, 0x18, 0x3c, 0x7e, 0xff, 0xff, 0x00, 0x00,
+ 0x00, 0xff, 0xff, 0x7e, 0x3c, 0x18, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x30, 0x78, 0x78, 0x30, 0x30, 0x00, 0x30, 0x00,
+ 0x6c, 0x6c, 0x6c, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x6c, 0x6c, 0xfe, 0x6c, 0xfe, 0x6c, 0x6c, 0x00,
+ 0x30, 0x7c, 0xc0, 0x78, 0x0c, 0xf8, 0x30, 0x00,
+ 0x00, 0xc6, 0xcc, 0x18, 0x30, 0x66, 0xc6, 0x00,
+ 0x38, 0x6c, 0x38, 0x76, 0xdc, 0xcc, 0x76, 0x00,
+ 0x60, 0x60, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x18, 0x30, 0x60, 0x60, 0x60, 0x30, 0x18, 0x00,
+ 0x60, 0x30, 0x18, 0x18, 0x18, 0x30, 0x60, 0x00,
+ 0x00, 0x66, 0x3c, 0xff, 0x3c, 0x66, 0x00, 0x00,
+ 0x00, 0x30, 0x30, 0xfc, 0x30, 0x30, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x60,
+ 0x00, 0x00, 0x00, 0xfc, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x00,
+ 0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0, 0x80, 0x00,
+ 0x7c, 0xc6, 0xce, 0xde, 0xf6, 0xe6, 0x7c, 0x00,
+ 0x30, 0x70, 0x30, 0x30, 0x30, 0x30, 0xfc, 0x00,
+ 0x78, 0xcc, 0x0c, 0x38, 0x60, 0xcc, 0xfc, 0x00,
+ 0x78, 0xcc, 0x0c, 0x38, 0x0c, 0xcc, 0x78, 0x00,
+ 0x1c, 0x3c, 0x6c, 0xcc, 0xfe, 0x0c, 0x1e, 0x00,
+ 0xfc, 0xc0, 0xf8, 0x0c, 0x0c, 0xcc, 0x78, 0x00,
+ 0x38, 0x60, 0xc0, 0xf8, 0xcc, 0xcc, 0x78, 0x00,
+ 0xfc, 0xcc, 0x0c, 0x18, 0x30, 0x30, 0x30, 0x00,
+ 0x78, 0xcc, 0xcc, 0x78, 0xcc, 0xcc, 0x78, 0x00,
+ 0x78, 0xcc, 0xcc, 0x7c, 0x0c, 0x18, 0x70, 0x00,
+ 0x00, 0x30, 0x30, 0x00, 0x00, 0x30, 0x30, 0x00,
+ 0x00, 0x30, 0x30, 0x00, 0x00, 0x30, 0x30, 0x60,
+ 0x18, 0x30, 0x60, 0xc0, 0x60, 0x30, 0x18, 0x00,
+ 0x00, 0x00, 0xfc, 0x00, 0x00, 0xfc, 0x00, 0x00,
+ 0x60, 0x30, 0x18, 0x0c, 0x18, 0x30, 0x60, 0x00,
+ 0x78, 0xcc, 0x0c, 0x18, 0x30, 0x00, 0x30, 0x00,
+ 0x7c, 0xc6, 0xde, 0xde, 0xde, 0xc0, 0x78, 0x00,
+ 0x30, 0x78, 0xcc, 0xcc, 0xfc, 0xcc, 0xcc, 0x00,
+ 0xfc, 0x66, 0x66, 0x7c, 0x66, 0x66, 0xfc, 0x00,
+ 0x3c, 0x66, 0xc0, 0xc0, 0xc0, 0x66, 0x3c, 0x00,
+ 0xf8, 0x6c, 0x66, 0x66, 0x66, 0x6c, 0xf8, 0x00,
+ 0xfe, 0x62, 0x68, 0x78, 0x68, 0x62, 0xfe, 0x00,
+ 0xfe, 0x62, 0x68, 0x78, 0x68, 0x60, 0xf0, 0x00,
+ 0x3c, 0x66, 0xc0, 0xc0, 0xce, 0x66, 0x3e, 0x00,
+ 0xcc, 0xcc, 0xcc, 0xfc, 0xcc, 0xcc, 0xcc, 0x00,
+ 0x78, 0x30, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00,
+ 0x1e, 0x0c, 0x0c, 0x0c, 0xcc, 0xcc, 0x78, 0x00,
+ 0xe6, 0x66, 0x6c, 0x78, 0x6c, 0x66, 0xe6, 0x00,
+ 0xf0, 0x60, 0x60, 0x60, 0x62, 0x66, 0xfe, 0x00,
+ 0xc6, 0xee, 0xfe, 0xfe, 0xd6, 0xc6, 0xc6, 0x00,
+ 0xc6, 0xe6, 0xf6, 0xde, 0xce, 0xc6, 0xc6, 0x00,
+ 0x38, 0x6c, 0xc6, 0xc6, 0xc6, 0x6c, 0x38, 0x00,
+ 0xfc, 0x66, 0x66, 0x7c, 0x60, 0x60, 0xf0, 0x00,
+ 0x78, 0xcc, 0xcc, 0xcc, 0xdc, 0x78, 0x1c, 0x00,
+ 0xfc, 0x66, 0x66, 0x7c, 0x6c, 0x66, 0xe6, 0x00,
+ 0x78, 0xcc, 0xe0, 0x70, 0x1c, 0xcc, 0x78, 0x00,
+ 0xfc, 0xb4, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00,
+ 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xfc, 0x00,
+ 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x78, 0x30, 0x00,
+ 0xc6, 0xc6, 0xc6, 0xd6, 0xfe, 0xee, 0xc6, 0x00,
+ 0xc6, 0xc6, 0x6c, 0x38, 0x38, 0x6c, 0xc6, 0x00,
+ 0xcc, 0xcc, 0xcc, 0x78, 0x30, 0x30, 0x78, 0x00,
+ 0xfe, 0xc6, 0x8c, 0x18, 0x32, 0x66, 0xfe, 0x00,
+ 0x78, 0x60, 0x60, 0x60, 0x60, 0x60, 0x78, 0x00,
+ 0xc0, 0x60, 0x30, 0x18, 0x0c, 0x06, 0x02, 0x00,
+ 0x78, 0x18, 0x18, 0x18, 0x18, 0x18, 0x78, 0x00,
+ 0x10, 0x38, 0x6c, 0xc6, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
+ 0x30, 0x30, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x78, 0x0c, 0x7c, 0xcc, 0x76, 0x00,
+ 0xe0, 0x60, 0x60, 0x7c, 0x66, 0x66, 0xdc, 0x00,
+ 0x00, 0x00, 0x78, 0xcc, 0xc0, 0xcc, 0x78, 0x00,
+ 0x1c, 0x0c, 0x0c, 0x7c, 0xcc, 0xcc, 0x76, 0x00,
+ 0x00, 0x00, 0x78, 0xcc, 0xfc, 0xc0, 0x78, 0x00,
+ 0x38, 0x6c, 0x60, 0xf0, 0x60, 0x60, 0xf0, 0x00,
+ 0x00, 0x00, 0x76, 0xcc, 0xcc, 0x7c, 0x0c, 0xf8,
+ 0xe0, 0x60, 0x6c, 0x76, 0x66, 0x66, 0xe6, 0x00,
+ 0x30, 0x00, 0x70, 0x30, 0x30, 0x30, 0x78, 0x00,
+ 0x0c, 0x00, 0x0c, 0x0c, 0x0c, 0xcc, 0xcc, 0x78,
+ 0xe0, 0x60, 0x66, 0x6c, 0x78, 0x6c, 0xe6, 0x00,
+ 0x70, 0x30, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00,
+ 0x00, 0x00, 0xcc, 0xfe, 0xfe, 0xd6, 0xc6, 0x00,
+ 0x00, 0x00, 0xf8, 0xcc, 0xcc, 0xcc, 0xcc, 0x00,
+ 0x00, 0x00, 0x78, 0xcc, 0xcc, 0xcc, 0x78, 0x00,
+ 0x00, 0x00, 0xdc, 0x66, 0x66, 0x7c, 0x60, 0xf0,
+ 0x00, 0x00, 0x76, 0xcc, 0xcc, 0x7c, 0x0c, 0x1e,
+ 0x00, 0x00, 0xdc, 0x76, 0x66, 0x60, 0xf0, 0x00,
+ 0x00, 0x00, 0x7c, 0xc0, 0x78, 0x0c, 0xf8, 0x00,
+ 0x10, 0x30, 0x7c, 0x30, 0x30, 0x34, 0x18, 0x00,
+ 0x00, 0x00, 0xcc, 0xcc, 0xcc, 0xcc, 0x76, 0x00,
+ 0x00, 0x00, 0xcc, 0xcc, 0xcc, 0x78, 0x30, 0x00,
+ 0x00, 0x00, 0xc6, 0xd6, 0xfe, 0xfe, 0x6c, 0x00,
+ 0x00, 0x00, 0xc6, 0x6c, 0x38, 0x6c, 0xc6, 0x00,
+ 0x00, 0x00, 0xcc, 0xcc, 0xcc, 0x7c, 0x0c, 0xf8,
+ 0x00, 0x00, 0xfc, 0x98, 0x30, 0x64, 0xfc, 0x00,
+ 0x1c, 0x30, 0x30, 0xe0, 0x30, 0x30, 0x1c, 0x00,
+ 0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00,
+ 0xe0, 0x30, 0x30, 0x1c, 0x30, 0x30, 0xe0, 0x00,
+ 0x76, 0xdc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x10, 0x38, 0x6c, 0xc6, 0xc6, 0xfe, 0x00,
+};
+
+ASM_START
+.org 0xcc00
+// bcc-generated data will be placed here
+ASM_END
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 16:56:04 +0000