1.\" $NetBSD: ppi.4,v 1.7 2002/04/05 05:37:23 gmcgarry Exp $ 2.\" 3.\" Copyright (c) 1990, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" the Systems Programming Group of the University of Utah Computer 8.\" Science Department. 9.\" 10.\" Redistribution and use in source and binary forms, with or without 11.\" modification, are permitted provided that the following conditions 12.\" are met: 13.\" 1. Redistributions of source code must retain the above copyright 14.\" notice, this list of conditions and the following disclaimer. 15.\" 2. Redistributions in binary form must reproduce the above copyright 16.\" notice, this list of conditions and the following disclaimer in the 17.\" documentation and/or other materials provided with the distribution. 18.\" 3. All advertising materials mentioning features or use of this software 19.\" must display the following acknowledgement: 20.\" This product includes software developed by the University of 21.\" California, Berkeley and its contributors. 22.\" 4. Neither the name of the University nor the names of its contributors 23.\" may be used to endorse or promote products derived from this software 24.\" without specific prior written permission. 25.\" 26.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36.\" SUCH DAMAGE. 37.\" 38.\" from: @(#)ppi.4 8.1 (Berkeley) 6/9/93 39.\" 40.Dd June 9, 1993 41.Dt PPI 4 hp300 42.Os 43.Sh NAME 44.Nm ppi 45.Nd 46.Tn HP-IB 47printer/plotter interface 48.Sh SYNOPSIS 49.Cd "ppi0 at hpibbus0 slave 5" 50.Sh DESCRIPTION 51The 52.Nm ppi 53interface provides a means of communication with 54.Tn HP-IB 55printers and plotters. 56.Pp 57Special files 58.Pa ppi0 59through 60.Pa ppi7 61are used to access the devices, with the digit at the end 62of the filename referring to the bus address of the device. 63Current versions of the autoconf code can not probe for these 64devices, so the device entry in the configuration file must be 65fully qualified. 66.Pp 67The device files appear as follows: 68.Bd -literal -offset indent 69"crw-rw-rw- 1 root 11, 0 Dec 21 11:22 /dev/ppi" 70.Ed 71.Sh DIAGNOSTICS 72None. 73.Sh SEE ALSO 74.Xr hpib 4 75.Sh BUGS 76This driver is very primitive, it handshakes data out byte by byte. 77It should use 78.Tn DMA 79if possible. 80