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Int 10 Fn 4F05 - VESA SuperVGA BIOS - CPU Video Memory Control [V]
AX = 4F05h
BH = subfunction
00h select video memory window
DX = window address in video memory (in granularity units)
01h get video memory window
Return: DX = window address in video memory (in gran. units)
BL = window number
00h window A
01h window B
Return: AL = 4Fh function supported
AH = status
00h successful
01h failed
See Also: AX=4F01h,AX=4F06h,AX=4F07h,AX=7000h/BX=0004h
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