pcl man page on Ultrix

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pcl(4)				  Unsupported				pcl(4)

Name
       pcl - 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 Also
       intro(4n), inet(4f)

				      VAX				pcl(4)
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