ref: ae67a130d6b012c564c86439e972acc8f9ccd990
dir: /sys/man/3/lpt/
.TH LPT 3 .SH NAME lpt \- parallel port interface for PC's .SH SYNOPSIS .nf .B bind -a #L[123] /dev .B /dev/lpt[123]data .B /dev/lpt[123]dlr .B /dev/lpt[123]pcr .B /dev/lpt[123]psr .fi .SH DESCRIPTION The .I lpt driver provides an interface to the parallel interface normally used for printers. The specifiers .BR 1 , .BR 2 , and .BR 3 correspond to the parallel interfaces at PC ports 0x3bc, 0x378, and 0x278 respectively. .PP .B Lpt?data is write only. Writing to it sends data to the interface. This file is sufficient for communicating with most printers. .PP .BR Lpt?dlr , .BR lpt?pcr , and .B 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. .SH SOURCE .B /sys/src/9/pc/devlpt.c