77 lines
3.1 KiB
Groff
77 lines
3.1 KiB
Groff
.\" $NetBSD: eca.4,v 1.5 2002/01/21 18:02:53 wiz Exp $
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.\"
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.\" Copyright (c) 2001 Ben Harris
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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. The name of the author may not be used to endorse or promote products
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.\" derived from this software without 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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.Dd September 11, 2001
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.Os
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.Dt ECA 4 arm26
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.Sh NAME
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.Nm eca
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.Nd Acorn Econet driver
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.Sh SYNOPSIS
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.Cd eca0 at ioc0 bank 2
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.Sh DESCRIPTION
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The
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.Nm
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driver provides access to an Econet network through a standard Acorn
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Econet module, based on the Motorola 6854 ADLC. It obtains its Econet
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station number from the machine's CMOS RAM.
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.Sh DIAGNOSTICS
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.Bl -diag
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.It %s: Tx underrun
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Transmission of a frame failed because the driver couldn't get data to
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the ADLC fast enough. This might be caused by the network clock rate
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being too high, or by the current screen mode using too much of the
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data bus's bandwidth.
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.It %s: collision
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A collision occurred while transmitting a frame. The transmission
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should be retried, but currently isn't.
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.It %s: incomplete transmission
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A transmission failed to complete, but no obvious reason was found.
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This should never happen.
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.It %s: Rx overrun
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Reception of a frame failed because the driver couldn't get data off
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the ADLC fast enough. Likely causes are the same as for
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.Ql \&Tx underrun
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above.
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.It %s: Rx abort
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A frame being received was aborted before it was complete. This was
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probably caused by a problem at the transmitting station.
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.It %s: CRC error
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A received frame failed its cyclic redundancy check and was discarded.
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This is usually due to electrical noise on the network.
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.It %s: No clock
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The clock signal on the Econet has disappeared. This probably
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indicates that the machine is unplugged from the network, or that the
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network itself has failed.
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.It %s: Oversized frame
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A frame larger than the current MTU of the interface was received and
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discarded.
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.El
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.Sh SEE ALSO
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.Xr netintro 4 ,
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.Xr ifconfig 8
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