pcl(4) Unsupported pcl(4)Namepcl - DEC CSS PCL-11 B Network Interface
Syntax
device pcl0 at uba? csr 0164200 vector pclxint pclrint
Description
The device provides an IP-only interface to the DEC CSS PCL-11 time
division multiplexed network bus. The controller itself is not acces‐
sible to users.
The hosts's address is specified with the SIOCSIFADDR ioctl. The
interface will not transmit or receive any data before its address is
defined.
As the PCL-11 hardware is only capable of having 15 interfaces per net‐
work, a single-byte host-on-network number is used, with range [1..15]
to match the TDM bus addresses of the interfaces.
The interface currently only supports the Internet protocol family and
only provides ``natural'' (header) encapsulation.
Diagnostics
pcl%d: can't init.
Insufficient UNIBUS resources existed to initialize the device. This
is likely to occur when the device is run on a buffered data path on an
11/750 and other network interfaces are also configured to use buffered
data paths, or when it is configured to use buffered data paths on an
11/730 (which has none).
pcl%d: can't handle af%d.
The interface was handed a message with addresses formatted in an
unsuitable address family; the packet was dropped.
pcl%d: stray xmit interrupt.
An interrupt occurred when no output had previously been started.
pcl%d: master.
The TDM bus had no station providing ``bus master'' timing signals, so
this interface has assumed the ``master'' role. This message should
only appear at most once per UNIBUS INIT on a single system. Unless
there is a hardware failure, only one station may be master at at time.
pcl%d: send error, tcr=%b, tsr=%b.
The device indicated a problem sending data on output. If a ``receiver
offline'' error is detected, it is not normally logged unless the
option PCL_TESTING has been selected, as this causes a lot of console
chatter when sending to a down machine. However, this option is quite
useful when debugging problems with the PCL interfaces.
pcl%d: rcv error, rcr=%b rsr=%b.
The device indicated a problem receiving data on input.
pcl%d: bad len=%d.
An input operation resulted in a data transfer of less than 0 or more
than 1008 bytes of data into memory (according to the word count regis‐
ter). This should never happen as the maximum size of a PCL message
has been agreed upon to be 1008 bytes (same as ArpaNet message).
See Alsointro(4n), inet(4f)
VAX pcl(4)