Format of Matrox-specific VESA extensions information |
| Offset | Size | Description |
|---|---|---|
|
00h |
7 BYTEs |
signature "VBE/MGA" |
|
07h |
10 BYTEs |
??? (01h 01h 00h 00h 00h 00h 00h 00h 00h 07h) |
|
11h |
WORD |
BIOS version (high byte = major, low byte = one-digit minor) |
|
13h |
DWORD |
manufacturer name (ASCIZ "Matrox") |
|
17h |
DWORD |
ASCIZ card name |
|
1Bh |
DWORD |
ASCIZ string (empty string on card examined) |
|
1Fh |
DWORD |
ASCIZ vendor name |
|
23h |
DWORD |
ASCIZ BIOS file base name |
|
27h |
DWORD |
PINS |
|
2Bh |
WORD |
video memory size in 64K units |
|
2Dh |
DWORD |
linear address of linear frame buffer |
|
31h |
DWORD |
linear address of MGA control aperture |
|
35h |
WORD |
PCI bus/device for card??? |
|
37h |
201 BYTEs |
unused??? (cleared to 00h) |