80 lines
2.9 KiB
Groff
80 lines
2.9 KiB
Groff
.\" $NetBSD: ppi.4,v 1.6 2002/01/15 01:36:51 wiz Exp $
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.\"
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.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the Systems Programming Group of the University of Utah Computer
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.\" Science Department.
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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 the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)ppi.4 8.1 (Berkeley) 6/9/93
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.\"
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.Dd June 9, 1993
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.Dt PPI 4 hp300
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.Os
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.Sh NAME
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.Nm ppi
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.Nd
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.Tn HP-IB
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printer/plotter interface
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.Sh SYNOPSIS
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.Cd "ppi0 at hpib0 slave 5"
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.Sh DESCRIPTION
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The
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.Nm ppi
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interface provides a means of communication with
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.Tn HP-IB
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printers and plotters.
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.Pp
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Special files
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.Pa ppi0
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through
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.Pa ppi7
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are used to access the devices, with the digit at the end
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of the filename referring to the bus address of the device.
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Current versions of the autoconf code can not probe for these
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devices, so the device entry in the configuration file must be
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fully qualified.
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.Pp
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The device files appear as follows:
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.Bd -literal -offset indent
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"crw-rw-rw- 1 root 11, 0 Dec 21 11:22 /dev/ppi"
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.Ed
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.Sh DIAGNOSTICS
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None.
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.Sh SEE ALSO
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.Xr hpib 4
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.Sh BUGS
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This driver is very primitive, it handshakes data out byte by byte.
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It should use
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.Tn DMA
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if possible.
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