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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
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