American Megatrends Super Voyager LPX, Руководство пользователя

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Chapter 4 VGA BIOS
120
Super VGA Functions,
Continued
Function 00h Return Super VGA Information
This function provides information to the calling program about the
general capabilities of the SVGA environment. The function fills an
information block structure at the address specified by the caller. The
information block size is 256 bytes.
Input: AH = 4Fh SVGA is supported.
AL = 00h Return SVGA Information
ES:DI = Pointer to Buffer
Output:
AX = Status
All other registers are preserved
The information block has the following structure:
VgaInfoBlock struc
VESASignature db 'VESA' ; 4 signature bytes
VESAVersion
dw ? ; VESA version number
OEMStringPtr dd ? ; Pointer to OEM string
Capabilities db 4 dup (?) ; capabilities of the video environment
VideoModePtr dd ? ; pointer to supported SVGA modes
TotalMemory dw ? ; number of 64K memory blocks on board
Reserved db 236 dup (?) ; Remainder of VgaInfoBlock
VgaInfoBlock ends