lpt man page on Plan9

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LPT(3)									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 paral‐
       lel 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 writ‐
       ing the data latch register, printer control register, and printer sta‐
       tus register.  These are used by programs to drive special devices.

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

									LPT(3)
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