diff options
Diffstat (limited to 'src/devices/device.c')
| -rw-r--r-- | src/devices/device.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/devices/device.c b/src/devices/device.c index 9e5e24580c..8e6fcb3519 100644 --- a/src/devices/device.c +++ b/src/devices/device.c @@ -217,8 +217,12 @@ void compute_allocate_resource( if (resource->flags & IORESOURCE_IO) { /* Don't allow potential aliases over the * legacy pci expansion card addresses. + * The legacy pci decodes only 10 bits, + * uses 100h - 3ffh. Therefor, only 0 - ff + * can be used out of each 400h block of io + * space. */ - if ((base > 0x3ff) && ((base & 0x300) != 0)) { + if ((base & 0x300) != 0) { base = (base & ~0x3ff) + 0x400; } /* Don't allow allocations in the VGA IO range. |