Int 10/AX=A000h

AX = A000h
CL = ??? (bits 2-0 may not be 000)
CH = ??? (81h or ???)
DX = segment of ??? (if CH=81h)
???

Return:
AX = ???

Program: The ATI BIOS extensions are supported by ATI graphics cards containing the Mach64 or newer graphics chips (Rage Pro, Rage 128, etc.)

See Also: AX=4F10h/BL=00h - AX=A001h