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AH = 12h BL = 20h select alternate print screen routine
Return:
Nothing
Desc: Installs a PrtSc routine from the video card's BIOS to replace the default PrtSc handler from the ROM BIOS, which usually does not understand screen heights other than 25 lines
Note: Some adapters disable print-screen instead of enhancing it
See Also: INT 05"PRINT SCREEN"
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