1.\" $NetBSD: lpt.4,v 1.2 2003/04/17 10:32:40 wiz Exp $ 2.\" 3.\" Copyright (c) 1995 Mark Brinicombe 4.\" Copyright (c) 1993 Christopher G. Demetriou 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by Christopher G. Demetriou. 18.\" 4. The name of the author may not be used to endorse or promote products 19.\" derived from this software without specific prior written permission 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31.\" 32.Dd July 29, 1995 33.Dt LPT 4 acorn32 34.Os 35.Sh NAME 36.Nm lpt 37.Nd parallel port driver 38.Sh SYNOPSIS 39.Cd lpt* at pioc? offset 0x0278 irq 0 40.Cd lpt* at pioc? offset 0x0378 irq -1 41.Cd lpt* at pioc? offset 0x03bc irq -1 42.Sh DESCRIPTION 43This driver provides access to parallel ports. The highest bit in the minor 44number selects whether to do polling or wait for interrupts. If no IRQ is 45specified in the kernel configuration, only the polling device may be used. 46.Sh FILES 47.Bl -tag -width Pa -compact 48.It Pa /dev/lpt0 49first interrupt-driven parallel port device 50.It Pa /dev/lpa0 51first polled parallel port device 52.El 53