1.\" $NetBSD: acc.4,v 1.11 2003/08/07 10:31:10 agc Exp $ 2.\" 3.\" Copyright (c) 1983, 1991, 1993 4.\" The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" from: @(#)acc.4 8.1 (Berkeley) 6/5/93 31.\" 32.Dd June 5, 1993 33.Dt ACC 4 vax 34.Os 35.Sh NAME 36.Nm acc 37.Nd 38.Tn ACC LH/DH IMP 39network interface 40.Sh SYNOPSIS 41.Cd pseudo-device imp "acc0 at uba0 csr 167600 vector accrint accxint" 42.Sh DESCRIPTION 43NOTE: 44At the moment 45.Nx 46does not support 47.Tn IMP , 48so this manual page is not relevant. 49.Pp 50The 51.Nm acc 52device provides a Local Host/Distant Host 53interface to an 54.Tn IMP . 55It is normally used when participating 56in the 57.Tn DARPA 58Internet. The controller itself is not accessible 59to users, but instead provides the hardware support to the 60.Tn IMP 61interface described in 62.Xr imp 4 . 63The configuration entry for the 64.Xr imp 4 65must also include the 66.Em pseudo-device 67as shown above. 68.Sh DIAGNOSTICS 69.Bl -diag 70.It acc%d: not alive. 71The initialization routine was entered even though the device 72did not autoconfigure. This indicates a system problem. 73.Pp 74.It acc%d: can't initialize. 75Insufficient UNIBUS resources existed to initialize the device. 76This is likely to occur when the device is run on a buffered 77data path on an 11/750 and other network interfaces are also 78configured to use buffered data paths, or when it is configured 79to use buffered data paths on an 11/730 (which has none). 80.Pp 81.It acc%d: imp doesn't respond, icsr=%b. 82The driver attempted to initialize the device, but the 83.Tn IMP 84failed to respond after 500 tries. Check the cabling. 85.Pp 86.It acc%d: stray xmit interrupt, csr=%b. 87An interrupt occurred when no output had previously been started. 88.Pp 89.It acc%d: output error, ocsr=%b, icsr=%b. 90The device indicated a problem sending data on output. 91.Pp 92.It acc%d: input error, csr=%b. 93The device indicated a problem receiving data on input. 94.Pp 95.It acc%d: bad length=%d. 96An input operation resulted in a data transfer of less than 970 or more than 1008 bytes of 98data into memory (according to the word count register). 99This should never happen as the maximum size of a 100.Pf host- Tn IMP 101message is 1008 bytes. 102.El 103.Sh SEE ALSO 104.Xr netintro 4 105.Sh HISTORY 106The 107.Nm 108interface appeared in 109.Bx 4.2 . 110