89 lines
2.9 KiB
Groff
89 lines
2.9 KiB
Groff
.\" $NetBSD: lpt.4,v 1.4 1998/03/25 02:13:32 fair Exp $
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.\"
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.\" Copyright (c) 1994, 1997 Matthias Pfaller.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Matthias Pfaller.
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.\" 4. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd December 1, 1994
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.Dt LPT 4 pc532
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.Os
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.Sh NAME
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.Nm lpt
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.Nd Centronics parallel port
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.Sh SYNOPSIS
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.Cd "lpt0 at mainbus? addr ? irq ?"
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.Cd "lpt1 at mainbus? addr ? irq ?"
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.Sh DESCRIPTION
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This driver provides access to Centronics parallel ports.
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.Pp
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Bit 6 in the minor number selects whether to omit pulling /PRIME
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low on opens or not.
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If the minor has bit 5 set, AUTOLINEFEED will be asserted when
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transferring data to the printer.
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.Pp
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Address and IRQ default to 0xffc80030,7 for lpt0 and to 0xffc80034,6 for lpt1.
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.Sh FILES
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.Bl -tag -compact -width Pa
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.It Pa /dev/lpt0
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first parallel port device
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.It Pa /dev/lpt1
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second parallel port device
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "lpt?: out of paper"
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The printer asserted the
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.Em Paper Empty
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signal.
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.It "lpt?: offline"
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The printer did not assert the
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.Em Select
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signal.
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.It "lpt?: output error"
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The printer asserted the
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.Em /Error
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signal.
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.It "lpt?: NACK low"
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The printer didn't release the
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.Em /Ack
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signal.
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.It "lpt?: NBUSY low"
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The printer didn't release the
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.Em Busy
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signal.
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.El
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.Sh SEE ALSO
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.Xr plip 4
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.Pp
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Contact Matthias Pfaller <leo@dachau.marco.de> to get instructions
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on building a Centronics interface for your pc532.
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.Sh HISTORY
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The
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.Nm
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driver appeared in
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.Nx 1.0 .
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