1.\" $NetBSD: lpt.4,v 1.2 2024/09/07 19:13:28 rillig Exp $ 2.\" 3.\" Copyright (c) 1993 Christopher G. Demetriou 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed for the 17.\" NetBSD Project. See https://www.NetBSD.org/ for 18.\" information about NetBSD. 19.\" 4. The name of the author may not be used to endorse or promote products 20.\" derived from this software without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32.\" 33.\" <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>> 34.\" 35.Dd September 23, 2011 36.Dt LPT 4 x86 37.Os 38.Sh NAME 39.Nm lpt 40.Nd 41Parallel port driver 42.Sh SYNOPSIS 43.\" XXX this is awful hackery to get it to work right... -- cgd 44.Cd "lpt0 at isa? port" \&"IO_LPT1\&" irq 7 45.Cd "lpt1 at isa? port" \&"IO_LPT2\&" 46.Cd "lpt* at acpi?" 47.Cd "lpt* at ofisa?" 48.Cd "lpt* at pnpbios? index ?" 49.Cd "lpt* at puc? port ?" 50.Sh DESCRIPTION 51This driver provides access to parallel ports. 52The bits in the minor number select various features of the driver. 53If no IRQ is 54specified in the kernel configuration, only the polling device may be used. 55.Pp 56.Bl -column "Minor Bit" "Functionxxxxxxxxxxxxxxxxxxxxxxxxxxxx" -offset indent 57.It Sy "Minor Bit" Function 58.It 128 Use the interruptless driver. (polling) 59.It 64 \&Do not initialize the device on the port. 60.It 32 Automatic LF on CR. 61.El 62.Sh FILES 63.Bl -tag -width "/dev/lpt0xx" -compact 64.It Pa /dev/lpt0 65first interrupt-driven parallel port device 66.It Pa /dev/lpa0 67first polled parallel port device 68.El 69.Sh SEE ALSO 70.Xr acpi 4 , 71.Xr isa 4 , 72.Xr ofisa 4 , 73.Xr pnpbios 4 , 74.Xr puc 4 75