1993-08-01 11:32:48 +04:00
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.\" Copyright (c) 1983, 1991 The Regents of the University of California.
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.\" All rights reserved.
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1993-03-21 12:45:37 +03:00
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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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1993-08-01 11:32:48 +04:00
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.\" from: @(#)acc.4 6.4 (Berkeley) 3/27/91
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.\" $Id: acc.4,v 1.2 1993/08/01 07:36:39 mycroft Exp $
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1993-03-21 12:45:37 +03:00
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.\"
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1993-08-01 11:32:48 +04:00
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.Dd March 27, 1991
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1993-03-21 12:45:37 +03:00
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.Dt ACC 4 vax
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.Os BSD 4.2
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.Sh NAME
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.Nm acc
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.Nd
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.Tn ACC LH/DH IMP
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interface
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.Sh SYNOPSIS
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.Cd pseudo-device imp "device acc0 at uba0 csr 167600 vector accrint accxint"
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.Sh DESCRIPTION
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The
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.Nm acc
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device provides a Local Host/Distant Host
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interface to an
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.Tn IMP .
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It is normally used when participating
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in the
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.Tn DARPA
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Internet. The controller itself is not accessible
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to users, but instead provides the hardware support to the
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.Tn IMP
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interface described in
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.Xr imp 4 .
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The configuration entry for the
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.Xr imp
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must also include the
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.Em pseudo-device
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as shown above.
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.Sh DIAGNOSTICS
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.Bl -diag
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.It acc%d: not alive.
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The initialization routine was entered even though the device
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did not autoconfigure. This indicates a system problem.
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.Pp
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.It acc%d: can't initialize.
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Insufficient UNIBUS resources existed to initialize the device.
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This is likely to occur when the device is run on a buffered
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data path on an 11/750 and other network interfaces are also
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configured to use buffered data paths, or when it is configured
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to use buffered data paths on an 11/730 (which has none).
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.Pp
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.It acc%d: imp doesn't respond, icsr=%b.
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The driver attempted to initialize the device, but the
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.Tn IMP
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failed to respond after 500 tries. Check the cabling.
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.Pp
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.It acc%d: stray xmit interrupt, csr=%b.
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An interrupt occurred when no output had previously been started.
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.Pp
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.It acc%d: output error, ocsr=%b, icsr=%b.
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The device indicated a problem sending data on output.
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.Pp
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.It acc%d: input error, csr=%b.
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The device indicated a problem receiving data on input.
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.Pp
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.It acc%d: bad length=%d.
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An input operation resulted in a data transfer of less than
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0 or more than 1008 bytes of
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data into memory (according to the word count register).
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This should never happen as the maximum size of a
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.Pf host- Tn IMP
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message is 1008 bytes.
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.El
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.Sh SEE ALSO
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.Xr netintro 4
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.Sh HISTORY
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The
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.Nm
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interface appeared in
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.Bx 4.2 .
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