CSS(4)                NetBSD/vax Kernel Interfaces Manual               CSS(4)

NAME
     css -- DEC IMP-11A LH/DH IMP network interface

SYNOPSIS
     pseudo-device imp device css0 at uba0 csr 167600 flags 10 vector cssrint
           cssxint

DESCRIPTION
     NOTE: At the moment, NetBSD does not support IMP, so this manual page is
     not relevant.

     The css device provides a Local Host/Distant Host interface to an IMP.
     It is normally used when participating in the DARPA Internet.  The con-
     troller itself is not accessible to users, but instead provides the hard-
     ware support to the IMP interface described in imp(4).  The configuration
     entry for the imp(4) must also include the pseudo-device as shown above.

DIAGNOSTICS
     css%d: not alive.  The initialization routine was entered even though the
     device did not autoconfigure.  This is indicates a system problem.

     css%d: can't initialize.  Insufficient UNIBUS resources existed to ini-
     tialize 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).

     css%d: imp doesn't respond, icsr=%b.  The driver attempted to initialize
     the device, but the IMP failed to respond after 500 tries.  Check the
     cabling.

     css%d: stray output interrupt csr=%b.  An interrupt occurred when no out-
     put had previously been started.

     css%d: output error, ocsr=%b icsr=%b.  The device indicated a problem
     sending data on output.

     css%d: recv error, csr=%b.  The device indicated a problem receiving data
     on input.

     css%d: bad length=%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 register).  This should never happen as the maximum size of a
     host-IMP message is 1008 bytes.

HISTORY
     The css interface appeared in 4.2BSD.

NetBSD 5.0_STABLE                June 5, 1993                NetBSD 5.0_STABLE
