INT 17H: Printer Support

 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