Int 10/AH=12h/BL=A4h

Cirrus Logic BIOS - SET MONITOR TYPE

AH = 12h
BL = A4h
AL = options 1
bits 7-4 = vertical refresh at 640x480
(0 = 60Hz, 1 = 72Hz, other reserved)
bits 3-0 = maximum vertical resolution
(0 = 480 scanlines, 1 = 600, 2 = 768, 3 = 1024, other reserved)
BH = options 2
bits 7-4 = vertical refresh at 1024x768
(0=87Hz-int, 1=60Hz, 2=70Hz, 3=72Hz, 4=76Hz, other reserved)
bits 3-0 = vertical refresh at 800x600
(0 = 56Hz, 1 = 60Hz, 2 = 72Hz, other reserved)
CH = options 3
bits 7-4 = vertical refresh at 1280x1024
(0=87Hz-int, 1=60Hz, 2=70Hz, other reserved)
bits 3-0:
Reserved.
CL,DX reserved

Return:
Nothing

See Also: AH=12h/BL=9Ah - AH=12h/BL=A3h

Category: Video - Int 10h - C

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