np —
Interlan Np100 10 Mb/s Ethernet interface
np0 at uba0 csr 166000 vector npintr
NOTE: This driver has not been ported from 4.4BSD yet.
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 failures
    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 (usually
      0x400).
- NPNETBOOT
- downloads the image from a server on the network. [Contact MICOM-INTERLAN
      for details.]
  - np%d: Bad Maintenance command: %x!
- An invalid ioctl(2) 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.
Thenp driver appeared in
  4.3BSD.