From 46439007cf417cbd9ac8049bb4122c890097a0fa Mon Sep 17 00:00:00 2001 From: "Charles.Forsyth" Date: Fri, 22 Dec 2006 20:52:35 +0000 Subject: 20060303-partial --- man/3/lpt | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 man/3/lpt (limited to 'man/3/lpt') diff --git a/man/3/lpt b/man/3/lpt new file mode 100644 index 00000000..0d149699 --- /dev/null +++ b/man/3/lpt @@ -0,0 +1,51 @@ +.TH LPT 3 +.SH NAME +lpt \- parallel port interface +.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 0x378, 0x3bc, 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. +The data is written as a hexadecimal +(leading +.BR 0x ), +octal +(leading +.BR 0 ) +or decimal number. +Reads return a hexadecimal number representing the value of the register. +.SH SOURCE +.B /os/*/devlpt.c -- cgit v1.2.3