These functions provide access to the parallel printer ports (LPT1, etc.)

The printer port addresses are stored starting at 0040:0008.  Printer

time-out intervals start at 0040:0078.  See BIOS Data Area.

AH  BIOS Service

00H print a character

01H setup printer port

02H query printer status

Note: The BIOS offers no support for bidirectional parallel

communications (though standard PC hardware has supported it

since about 1987).

See Also: Parallel Printer Adapter Ports

INT 05H (print screen)

Printer Functions (DOS fns)

BIOS Data Area

ROM-BIOS Functions

Cables and Pin Outs

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