Int 10/AX=1A00h

VIDEO - GET DISPLAY COMBINATION CODE (PS,VGA/MCGA)

AX = 1A00h

Return:
AL = 1Ah if function was supported
BL = active display code (see #00039)
BH = alternate display code (see #00039)

Notes: This function is commonly used to check for the presence of a VGA. This function is supported on the ATI EGA Wonder with certain undocumented configuration switch settings, even though the EGA Wonder does not support VGA graphics; to distinguish this case, call AX=1C00h with CX nonzero, which the EGA Wonder does not support

See Also: AH=12h/BL=35h - AX=1A01h - AH=1Bh - AH=1Ch

Index:
Installation check;VGA

(Table 00039) Values for display combination code: 00h no display 01h monochrome adapter w/ monochrome display 02h CGA w/ color display 03h reserved 04h EGA w/ color display 05h EGA w/ monochrome display 06h PGA w/ color display 07h VGA w/ monochrome analog display 08h VGA w/ color analog display 09h reserved 0Ah MCGA w/ digital color display 0Bh MCGA w/ monochrome analog display 0Ch MCGA w/ color analog display FFh unknown display type

Category: Video - Int 10h - V

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