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AH = 05h AL = subfunction 81h set CPU page register BL = CPU page 82h set CRT page register BH = CRT page 83h set both CPU and CRT page registers BL = CPU page BH = CRT page
Return:
Nothing
Notes: The CPU page determines which 16K block of the first 128K of physical memory will be mapped at B800h by the hardware. The CRT page determines the start address of the memory used by the video controller
See Also: AX=0580h
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