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Int 10 Fn 12 - Cirrus Logic BIOS - Get Video Mode Availability [V]
AH = 12h
BL = A0h
AL = video mode number (00h-7Fh)
Return: AH bit 0: video mode supported
BX = offset of BIOS subroutine to fixup standard video parameters
(call subroutine with DS:SI and ES:DI as returned by this call)
DS:SI -> standard video parameters or FFFFh:FFFFh
ES:DI -> supplemental video parameters or FFFFh:FFFFh
See Also: AH=00h,AH=12h/BL=9Ah,AH=12h/BL=A1h
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