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INT 05 - PRINT SCREEN
Desc:   dump the current text screen to the first printer
Notes:  normally invoked by the INT 09 handler when PrtSc key is pressed, but
          may be invoked directly by applications
        byte at 0050h:0000h contains status used by default handler
          00h not active
          01h PrtSc in progress
          FFh last PrtSc encountered error
        default handler is at F000h:FF54h in IBM PC and 100%-compatible BIOSes

See Also: 1012
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