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

05 - PRINT SCREEN