1.\" Copyright (c) 1983, 1991 Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)pcl.4 6.3 (Berkeley) 3/27/91 33.\" $Id: pcl.4,v 1.2 1993/08/01 07:36:05 mycroft Exp $ 34.\" 35.Dd March 27, 1991 36.Dt PCL 4 vax 37.Os BSD 4.2 38.Sh NAME 39.Nm pcl 40.Nd 41.Tn DEC CSS 42.Tn PCL-11 B 43Network Interface 44.Sh SYNOPSIS 45.Cd "device pcl0 at uba? csr 164200 vector pclxint pclrint" 46.Sh DESCRIPTION 47The 48.Nm pcl 49device provides an 50.Tn IP Ns -only 51interface to the 52.Tn DEC CSS 53.Tn PCL-11 54time division multiplexed network bus. 55The controller itself is not accessible to users. 56.Pp 57The hosts's address is specified with the 58.Dv SIOCSIFADDR 59.Xr ioctl 2 . 60The interface will not transmit or receive any data before 61its address is defined. 62.Pp 63As the 64.Tn PCL-11 65hardware is only capable of having 15 interfaces per network, 66a single-byte host-on-network number is used, with range [1..15] to match 67the 68.Tn TDM 69bus addresses of the interfaces. 70.Pp 71The interface currently only supports the Internet protocol family 72and only provides 73.Dq natural 74(header) encapsulation. 75.Sh DIAGNOSTICS 76.Bl -diag 77.It pcl%d: can't init. 78Insufficient 79.Tn UNIBUS 80resources existed to initialize the device. 81This is likely to occur when the device is run on a buffered 82data path on an 11/750 and other network interfaces are also 83configured to use buffered data paths, or when it is configured 84to use buffered data paths on an 11/730 (which has none). 85.Pp 86.It pcl%d: can't handle af%d. 87The interface was handed a message with addresses formatted in an 88unsuitable address family; the packet was dropped. 89.Pp 90.It pcl%d: stray xmit interrupt. 91An interrupt occurred when no output had previously been started. 92.Pp 93.It pcl%d: master. 94The 95.Tn TDM 96bus had no station providing ``bus master'' timing signals, 97so this interface has assumed the ``master'' role. This message should 98only appear at most once per 99.Tn UNIBUS INIT 100on a single system. 101Unless there is a hardware failure, only one station may be master at at time. 102.Pp 103.It pcl%d: send error, tcr=%b, tsr=%b. 104The device indicated a problem sending data on output. 105If a ``receiver offline'' error is detected, it is not normally logged 106unless the option 107.Dv PCL_TESTING 108has been selected, as this causes a lot 109of console chatter when sending to a down machine. However, this option 110is quite useful when debugging problems with the 111.Tn PCL 112interfaces. 113.Pp 114.It pcl%d: rcv error, rcr=%b rsr=%b. 115The device indicated a problem receiving data on input. 116.Pp 117.It pcl%d: bad len=%d. 118An input operation resulted in a data transfer of less than 1190 or more than 1008 bytes of 120data into memory (according to the word count register). 121This should never happen as the maximum size of a 122.Tn PCL 123message 124has been agreed upon to be 1008 bytes (same as ArpaNet message). 125.El 126.Sh SEE ALSO 127.Xr intro 4 , 128.Xr inet 4 129.Sh HISTORY 130The 131.Nm 132interface appeared in 133.Bx 4.2 . 134