1993-08-01 11:32:48 +04:00
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.\" Copyright (c) 1983, 1991 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: @(#)pcl.4 6.3 (Berkeley) 3/27/91
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.\" $Id: pcl.4,v 1.2 1993/08/01 07:36:05 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 PCL 4 vax
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.Os BSD 4.2
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.Sh NAME
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.Nm pcl
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.Nd
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.Tn DEC CSS
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.Tn PCL-11 B
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Network Interface
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.Sh SYNOPSIS
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.Cd "device pcl0 at uba? csr 164200 vector pclxint pclrint"
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.Sh DESCRIPTION
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The
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.Nm pcl
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device provides an
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.Tn IP Ns -only
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interface to the
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.Tn DEC CSS
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.Tn PCL-11
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time division multiplexed network bus.
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The controller itself is not accessible to users.
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.Pp
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The hosts's address is specified with the
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.Dv SIOCSIFADDR
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.Xr ioctl 2 .
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The interface will not transmit or receive any data before
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its address is defined.
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.Pp
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As the
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.Tn PCL-11
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hardware is only capable of having 15 interfaces per network,
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a single-byte host-on-network number is used, with range [1..15] to match
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the
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.Tn TDM
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bus addresses of the interfaces.
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.Pp
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The interface currently only supports the Internet protocol family
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and only provides
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.Dq natural
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(header) encapsulation.
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.Sh DIAGNOSTICS
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.Bl -diag
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.It pcl%d: can't init.
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Insufficient
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.Tn UNIBUS
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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 pcl%d: can't handle af%d.
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The interface was handed a message with addresses formatted in an
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unsuitable address family; the packet was dropped.
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.Pp
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.It pcl%d: stray xmit interrupt.
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An interrupt occurred when no output had previously been started.
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.Pp
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.It pcl%d: master.
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The
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.Tn TDM
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bus had no station providing ``bus master'' timing signals,
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so this interface has assumed the ``master'' role. This message should
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only appear at most once per
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.Tn UNIBUS INIT
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on a single system.
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Unless there is a hardware failure, only one station may be master at at time.
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.Pp
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.It pcl%d: send error, tcr=%b, tsr=%b.
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The device indicated a problem sending data on output.
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If a ``receiver offline'' error is detected, it is not normally logged
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unless the option
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.Dv PCL_TESTING
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has been selected, as this causes a lot
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of console chatter when sending to a down machine. However, this option
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is quite useful when debugging problems with the
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.Tn PCL
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interfaces.
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.Pp
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.It pcl%d: rcv error, rcr=%b rsr=%b.
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The device indicated a problem receiving data on input.
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.Pp
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.It pcl%d: bad len=%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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.Tn PCL
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message
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has been agreed upon to be 1008 bytes (same as ArpaNet message).
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.El
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.Sh SEE ALSO
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.Xr intro 4 ,
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.Xr inet 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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