NP(4)                  OpenBSD Programmer's Manual (VAX)                 NP(4)

NAME
     np - Interlan Np100 10 Mb/s Ethernet interface

SYNOPSIS
     device np0 at uba0 csr 166000 vector npintr

DESCRIPTION
     The np device provides access to an Interlan Np100 Ethernet interface for
     control functions.

     This interface is unusual in that it requires loading firmware into the
     controller before it may be used as a network link-level interface.  This
     is accomplished by opening a character special device, and writing data
     to it.  It is also possible to do post-mortem debugging of firmware fail-
     ures by reading the local memory of the device.

     Multiple control processes are allowed by opening separate minor devices;
     secondary interfaces are specified by shifting the interface number by 4
     bits.

     The device also responds to commands passed through the driver by the
     following ioctl(2)s:

     NPRESET    kills off all active network processes.

     NPSTART    begins execution of the board at the specified address (usual-
                ly 0x400).

     NPNETBOOT  downloads the image from a server on the network.  [Contact
                MICOM-INTERLAN for details.]

DIAGNOSTICS
     np%d: Bad Maintenance command: %x!  An invalid ioctl was passed to the np
     driver.

     np%d: Panic NP100 bad buffer chain.  An error occurred in an read or
     write operation causing it to run out of buffers before it finished the
     operation.  This indicates a kernel failure rather than a device failure.

     NP100 unit %d not found!  A failure occurred during initialization, such
     that the unibus address expected for the board was found to be bad.
     Probably indicates hardware problems with the board, as do the following:

           NP100 Unit %d timed out!
           NP100 Unit %d Failed diagnostics!
           Status from CSR0: %x.

     Panic from NP100 unit %d!
     Panic Message: %s.  An occurrence on the board was deemed serious enough
     to have the vax print it out.

     NP100 unit #%d available!  The board was successfully loaded and started.

     np%d: Bad Req: %x.  The board made a maintenance request to the vax that
     it did not understand.

     np%d: No more room on Command Queue!  The np driver allowed an internal
     resource to be exhausted.  This should never happen.

     There are 110 other diagnostic messages that can be enabled by setting
     bits in a debugging mask.  Consult the driver for details.

SEE ALSO
     arp(4), inet(4), ix(4), netintro(4)

HISTORY
     The np driver appeared in 4.3BSD.

OpenBSD 2.9                     March 27, 1991                               2
