Int 10/AH=12h/BL=33h

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VIDEO - ALTERNATE FUNCTION SELECT (VGA, MCGA) - GRAY-SCALE SUMMING

AH = 12h
BL = 33h
AL = new state
00h enable gray scale summing
01h disable gray scale summing

Return:
AL = 12h if function supported

Desc: Specify whether or not colors should be converted to gray scale when palette or color registers are loaded

See Also: AX=101Bh - AX=BF06h - AX=BF08h

Category: Video - Int 10h - V

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