1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" %sccs.include.redist.man% 5.\" 6.\" @(#)pcl.4 8.1 (Berkeley) 06/05/93 7.\" 8.Dd 9.Dt PCL 4 vax 10.Os BSD 4.2 11.Sh NAME 12.Nm pcl 13.Nd 14.Tn DEC CSS 15.Tn PCL-11 B 16Network Interface 17.Sh SYNOPSIS 18.Cd "device pcl0 at uba? csr 164200 vector pclxint pclrint" 19.Sh DESCRIPTION 20The 21.Nm pcl 22device provides an 23.Tn IP Ns -only 24interface to the 25.Tn DEC CSS 26.Tn PCL-11 27time division multiplexed network bus. 28The controller itself is not accessible to users. 29.Pp 30The hosts's address is specified with the 31.Dv SIOCSIFADDR 32.Xr ioctl 2 . 33The interface will not transmit or receive any data before 34its address is defined. 35.Pp 36As the 37.Tn PCL-11 38hardware is only capable of having 15 interfaces per network, 39a single-byte host-on-network number is used, with range [1..15] to match 40the 41.Tn TDM 42bus addresses of the interfaces. 43.Pp 44The interface currently only supports the Internet protocol family 45and only provides 46.Dq natural 47(header) encapsulation. 48.Sh DIAGNOSTICS 49.Bl -diag 50.It pcl%d: can't init. 51Insufficient 52.Tn UNIBUS 53resources existed to initialize the device. 54This is likely to occur when the device is run on a buffered 55data path on an 11/750 and other network interfaces are also 56configured to use buffered data paths, or when it is configured 57to use buffered data paths on an 11/730 (which has none). 58.Pp 59.It pcl%d: can't handle af%d. 60The interface was handed a message with addresses formatted in an 61unsuitable address family; the packet was dropped. 62.Pp 63.It pcl%d: stray xmit interrupt. 64An interrupt occurred when no output had previously been started. 65.Pp 66.It pcl%d: master. 67The 68.Tn TDM 69bus had no station providing ``bus master'' timing signals, 70so this interface has assumed the ``master'' role. This message should 71only appear at most once per 72.Tn UNIBUS INIT 73on a single system. 74Unless there is a hardware failure, only one station may be master at at time. 75.Pp 76.It pcl%d: send error, tcr=%b, tsr=%b. 77The device indicated a problem sending data on output. 78If a ``receiver offline'' error is detected, it is not normally logged 79unless the option 80.Dv PCL_TESTING 81has been selected, as this causes a lot 82of console chatter when sending to a down machine. However, this option 83is quite useful when debugging problems with the 84.Tn PCL 85interfaces. 86.Pp 87.It pcl%d: rcv error, rcr=%b rsr=%b. 88The device indicated a problem receiving data on input. 89.Pp 90.It pcl%d: bad len=%d. 91An input operation resulted in a data transfer of less than 920 or more than 1008 bytes of 93data into memory (according to the word count register). 94This should never happen as the maximum size of a 95.Tn PCL 96message 97has been agreed upon to be 1008 bytes (same as ArpaNet message). 98.El 99.Sh SEE ALSO 100.Xr intro 4 , 101.Xr inet 4 102.Sh HISTORY 103The 104.Nm 105interface appeared in 106.Bx 4.2 . 107