plan9 man page for lpt

LPT(3)							     Library Functions Manual							    LPT(3)

NAME
       lpt - parallel port interface for PC's

SYNOPSIS
       bind -a #L[123] /dev

       /dev/lpt[123]data
       /dev/lpt[123]dlr
       /dev/lpt[123]pcr
       /dev/lpt[123]psr

DESCRIPTION
       The  lpt  driver  provides an interface to the parallel interface normally used for printers.  The specifiers 1, 2, and 3 correspond to the
       parallel interfaces at PC ports 0x3bc, 0x378, and 0x278 respectively.

       Lpt?data is write only.	Writing to it sends data to the interface.  This file is sufficient for communicating with most printers.

       Lpt?dlr, lpt?pcr, and lpt?psr are used for fine control of the parallel port.  Reading or writing these files corresponds  to  reading  and
       writing	the  data  latch  register,  printer  control  register, and printer status register.  These are used by programs to drive special
       devices.

SOURCE
       /sys/src/9/pc/devlpt.c

																	    LPT(3)