1.\" $NetBSD: lpt.4,v 1.8 2004/02/04 14:27:18 wiz Exp $ 2.\" 3.\" 4.\" Copyright (c) 1993 Christopher G. Demetriou 5.\" Copyright (c) 1994 Geoffrey M. Rehmet 6.\" Copyright (c) 1999 Nicolas Souchu 7.\" All rights reserved. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" $FreeBSD: src/share/man/man4/lpt.4,v 1.9.2.2 2001/08/17 13:08:38 ru Exp $ 31.\" 32.Dd February 3, 2004 33.Dt LPT 4 34.Os 35.Sh NAME 36.Nm lpt 37.Nd generic printer device driver 38.Sh SYNOPSIS 39.Cd "lpt* at ppbus?" 40.Cd options LPT_DEBUG 41.Cd options LPT_VERBOSE 42.Sh DESCRIPTION 43The 44.Nm 45driver is the port of the lpt driver to the 46.Xr ppbus 4 47system. 48.Pp 49The purpose of this driver is to allow parallel port sharing with 50other parallel devices. 51See 52.Xr ppbus 4 53for more information about the parallel port bus system. 54.Pp 55The parallel port bus is reserved by 56.Nm 57when the printer device is opened and released when the device is 58closed. 59.Pp 60Ports can be configured to use interrupts, DMA, IEEE negotiations, and IEEE 61compliant transfer modes by using the 62.Xr lptctl 8 63command, with modes depending on the hardware available. 64.Sh FILES 65.Bl -tag -width "/dev/lpt0xxxx" -compact 66.It Pa /dev/lpt? 67parallel port device 68.It Pa /dev/lpt?ctl 69parallel port control device 70.El 71.Sh SEE ALSO 72.Xr atppc 4 , 73.Xr ppbus 4 , 74.Xr lptctl 8 , 75.Xr mknod 8 76.Sh HISTORY 77This driver is derived from the 78.Fx 79ppbus and also from the historic 80.Nx 81drivers. 82.Pp 83The 84.Nm 85driver used to assign special meaning for some bits of device minor. 86This was dropped in ppbus-based 87.Nm 88in favour of configuration via 89.Xr lptctl 8 . 90.Sh AUTHORS 91This manual page was based on the 92.Fx 93.Nm lpt 94manual page. 95The information has been updated for the 96.Nx 97port by Gary Thorpe. 98