projects / unix-history / blame
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1 | .\" Copyright (c) 1983 Regents of the University of California. |
| 2 | .\" All rights reserved. The Berkeley software License Agreement | |
| 3 | .\" specifies the terms and conditions for redistribution. | |
| 4 | .\" | |
| 95f51977 | 5 | .\" @(#)pcl.4 6.2 (Berkeley) 5/21/86 |
| e28f7377 | 6 | .\" |
| 95f51977 | 7 | .TH PCL 4 "May 21, 1986" |
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8 | .UC 5 |
| 9 | .SH NAME | |
| 10 | pcl \- DEC CSS PCL-11 B Network Interface | |
| 11 | .SH SYNOPSIS | |
| 12 | .B "device pcl0 at uba? csr 164200 vector pclxint pclrint" | |
| 13 | .SH DESCRIPTION | |
| 14 | The | |
| 15 | .I pcl | |
| 16 | device provides an IP-only interface to the DEC CSS PCL-11 | |
| 17 | time division multiplexed network bus. | |
| 18 | The controller itself is not accessible to users. | |
| 19 | .PP | |
| 20 | The hosts's address is specified with the SIOCSIFADDR ioctl. | |
| 21 | The interface will not transmit or receive any data before | |
| 22 | its address is defined. | |
| 23 | .PP | |
| 24 | As the PCL-11 hardware is only capable of having 15 interfaces per network, | |
| 25 | a single-byte host-on-network number is used, with range [1..15] to match | |
| 26 | the TDM bus addresses of the interfaces. | |
| 27 | .PP | |
| 28 | The interface currently only supports the Internet protocol family | |
| 29 | and only provides ``natural'' (header) encapsulation. | |
| 30 | .SH DIAGNOSTICS | |
| 31 | .BR "pcl%d: can't init" . | |
| 32 | Insufficient UNIBUS resources existed to initialize the device. | |
| 33 | This is likely to occur when the device is run on a buffered | |
| 34 | data path on an 11/750 and other network interfaces are also | |
| 35 | configured to use buffered data paths, or when it is configured | |
| 36 | to use buffered data paths on an 11/730 (which has none). | |
| 37 | .PP | |
| 38 | .BR "pcl%d: can't handle af%d" . | |
| 39 | The interface was handed a message with addresses formatted in an | |
| 40 | unsuitable address family; the packet was dropped. | |
| 41 | .PP | |
| 42 | .BR "pcl%d: stray xmit interrupt" . | |
| 8781d1b7 | 43 | An interrupt occurred when no output had previously been started. |
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44 | .PP |
| 45 | .BR "pcl%d: master" . | |
| 46 | The TDM bus had no station providing ``bus master'' timing signals, | |
| 47 | so this interface has assumed the ``master'' role. This message should | |
| 48 | only appear at most once per UNIBUS INIT on a single system. | |
| 49 | Unless there is a hardware failure, only one station may be master at at time. | |
| 50 | .PP | |
| 51 | .BR "pcl%d: send error, tcr=%b, tsr=%b" . | |
| 52 | The device indicated a problem sending data on output. | |
| 53 | If a ``receiver offline'' error is detected, it is not normally logged | |
| 54 | unless the option PCL_TESTING has been selected, as this causes a lot | |
| 55 | of console chatter when sending to a down machine. However, this option | |
| 56 | is quite useful when debugging problems with the PCL interfaces. | |
| 57 | .PP | |
| 58 | .BR "pcl%d: rcv error, rcr=%b rsr=%b" . | |
| 59 | The device indicated a problem receiving data on input. | |
| 60 | .PP | |
| 61 | .BR "pcl%d: bad len=%d" . | |
| 62 | An input operation resulted in a data transfer of less than | |
| 63 | 0 or more than 1008 bytes of | |
| 64 | data into memory (according to the word count register). | |
| 65 | This should never happen as the maximum size of a PCL message | |
| 66 | has been agreed upon to be 1008 bytes (same as ArpaNet message). | |
| 67 | .SH "SEE ALSO" | |
| 68 | intro(4N), inet(4F) |