American Megatrends Super Voyager LPX, Руководство пользователя

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Super Voyager LPX ISA Motherboard User's Guide
Super VGA Functions,
Continued
Function 00h Return Super VGA Information , cont'd
VgaInfoBlock Field Description
Field Description
VESASignature contains the characters 'VESA' if this is a valid block.
VESAVersion A binary field that specifies the VESA standard level that the
SVGA BIOS conforms to. The higher byte specifies the major
version number. The lower byte specifies the minor version
number. The current VESA version number is 1.2. The VESA
BIOS Extension is fully upward-compatible.
OEMStringPtr A far pointer to a null terminated OEM-defined string. The
string identifies the video chip, video board, and memory
configuration to hardware-specific display drivers. There are
no restrictions on the format of the string.
Capabilities Describes general features supported in the video environment.
The structure is:
Bits 31-1 Reserved
Bit 0
AC is switchable
0 DAC is fixed width, with six bits per primary
color.
1 DAC width is switchable.
VideoModePtr Points to a list of supported SVGA mode numbers. Each mode
number occupies one word (16 bits). The list of mode numbers
is terminated by a -1 (0FFFFh). The pointer could point to
ROM or RAM. Either the list would be a static string stored in
ROM, or the list would verify the current availability of any
mode returned by this Function through INT 10h Function 01h
Return Super VGA mode information. Not all SVGA video
cards support all modes.
TotalMemory Specifies the amount of memory installed on the VGA board.
Its value represents the number of 64 KB blocks of memory
currently installed.