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/*
* Copyright (C) 2007 Luc Verhaegen <libv@skynet.be>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef VGA_IO_H
#define VGA_IO_H
/*
* All IO necessary to poke VGA registers.
*/
/* VGA Enable */
unsigned char vga_enable_read(void);
void vga_enable_write(unsigned char value);
void vga_enable_mask(unsigned char value, unsigned char mask);
/* Miscellaneous register */
unsigned char vga_misc_read(void);
void vga_misc_write(unsigned char value);
void vga_misc_mask(unsigned char value, unsigned char mask);
/* Sequencer registers. */
unsigned char vga_sr_read(unsigned char index);
void vga_sr_write(unsigned char index, unsigned char value);
void vga_sr_mask(unsigned char index, unsigned char value, unsigned char mask);
/* CR registers. */
unsigned char vga_cr_read(unsigned char index);
void vga_cr_write(unsigned char index, unsigned char value);
void vga_cr_mask(unsigned char index, unsigned char value, unsigned char mask);
/* Attribute registers. */
unsigned char vga_ar_read(unsigned char index);
void vga_ar_write(unsigned char index, unsigned char value);
void vga_ar_mask(unsigned char index, unsigned char value, unsigned char mask);
/* Graphics registers. */
unsigned char vga_gr_read(unsigned char index);
void vga_gr_write(unsigned char index, unsigned char value);
void vga_gr_mask(unsigned char index, unsigned char value, unsigned char mask);
/* DAC functions. */
void vga_palette_enable(void);
void vga_palette_disable(void);
unsigned char vga_dac_mask_read(void);
void vga_dac_mask_write(unsigned char mask);
void vga_dac_read_address(unsigned char address);
void vga_dac_write_address(unsigned char address);
unsigned char vga_dac_data_read(void);
void vga_dac_data_write(unsigned char data);
#endif /* VGA_IO_H */
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