Int 10/AX=4E00h

VESA XGA BIOS Extensions - GET XGA ENVIRONMENT INFORMATION

AX = 4E00h
ES:DI -> 256-byte buffer for XGA information (see #00069)

Return:
AL = 4Eh if function supported
AH = status
00h successful
else error code

Desc: Determine whether VESA XGA extensions are present and the capabilities supported by the display adapter

See Also: AX=4E01h - AX=4E02h - AX=4F00h

Index:
Installation check;VESA XGA

Format of XGA information buffer:

Offset  Size    Description     (Table 00069)
00h  4 BYTEs   signature ("VESA")
04h    WORD    VESA version number
06h    DWORD   pointer to ASCIZ OEM string
0Ah    DWORD   environment flags (see #00070)
0Eh    WORD    number of XGA adapters installed (other VESA XGA functions
require a handle indicating which adapter to use)
10h 240 BYTEs  reserved

Bitfields for XGA environment flags:

Bit(s)  Description     (Table 00070)
0-1    system bus (00 = MCA, 01 = ISA, 10 = EISA)
2      bus mastering available
3-31   reserved

Category: Video - Int 10h - V

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