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63 lines
2.6 KiB
Groff
63 lines
2.6 KiB
Groff
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.\"
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.\" Copyright (c) 1993 Christopher G. Demetriou
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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 Christopher G. Demetriou.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software withough 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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.\" from: lpa.4,v 1.1 1993/08/06 10:34:11 cgd Exp
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.\" $Id$
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.\"
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.Dd August 28, 1993
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.Dt LPA 4 i386
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.Os FreeBSD
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.Sh NAME
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.Nm lpa
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.Nd
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Interruptless parallel port driver
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.Sh SYNOPSIS
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.\" XXX this is awful hackery to get it to work right... -- cgd
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.Cd "device lpa0 at isa? port" \&"IO_LPT1\&" tty
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.Cd "device lpa1 at isa? port" \&"IO_LPT2\&" tty
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.Cd "device lpa2 at isa? port" \&"IO_LPT3\&" tty
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.Sh DESCRIPTION
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This driver provides access to parallel ports. It assumes that
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the parallel port controller will not cause an interrupt, and
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therefore must poll the controller.
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.Sh FILES
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.Bl -tag -width Pa -compact
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.It Pa /dev/lpa0
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first interruptless parallel port driver
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.El
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.Sh SEE ALSO
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.Xr lpt 4
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.Sh BUGS
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This driver only exists to support broken parallel port implementations.
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Systems with properly working parallel ports should use the
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.Nm lpt
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driver instead, as it is less resource-hungry.
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.Pp
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This driver could stand a rewrite.
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