HP 3000 Manuals

System Startup, Configuration, and Shutdown Reference Manual

Hard Resetting the SPU 

Issuing the RS command causes the AP to reset the entire SPU, halting all
processing and I/O activity with the exception of itself and a few
operations that must maintain state even over resets.  The AP clears all
data from the standard output (SO) and data processing first-in-first-out
(DP FIFO) buffers.  When the first character arrives from either buffer,
the AP returns the console from control mode to console mode.


NOTE  The AP command interpreter is active during the period between
      command execution and the arrival of characters (on either buffer
      ports) from the system, though the control mode prompt (CM>) isn't
      available.


Executing this command generates messages and prompts essential to
resetting the system.

If the AP command interpreter encounters errors or inappropriate input
during the reset (RS) process, it may display a combination of the
following messages:

     Expecting "Y" or "N" (APERR 11)

     Unable to verify assertion of RESET_SYS backplane
     signal (APERR 01).

     RESET SYS backplane signal asserted, but unable to
     verify SPU deassertion of PPON backplane
     signal (APERR 02).

     PPON not reasserted by SPU after RESET_SYS
     deassertion (APERR 03).

The last three messages appear as a result of certain failures detected
by the AP during the reset process.  These messages are key to isolating
the cause of the failure of the failed field-replaceable unit.

Once the reset is complete, the system displays the following message:

     SPU hardware was successfully reset. (APMSG 02)

MPE/iX 5.0 Documentation