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
since the BOUND instruction also calls INT 05h, but returns control
to the BOUND instruction, a failed BOUND check will cause an infinite
loop of PrtScreens unless the INT 05 handler is aware of the problem
and checks whether the interrupt was invoked by a BOUND instruction
BUG: some old BIOSes/applications appear to destroy BP on return
SeeAlso: INT 10/AH=12h/BL=20h,INT 4A"Tandy 2000",INT 5E"TI Professional"
SeeAlso: INT 80"Phar Lap"