🚀 go-pugleaf

In <1992Dec18.191906.9807@nb.rockwell.com> cking@zeus.muse.rockwell.com (Christopher King) writes:

| In article <1992Dec17.154744.12298@aio.jsc.nasa.gov>,
| mancus@carla.JSC.NASA.GOV (Keith Mancus/MDSSC) writes: 
| |>> If you are talking about the PROM passwd, and the system boots
| |>> up, then you can run the command 'nvram passwd_key ""' to clear
| |>> it, if you have an Indigo.
| |>       ^^^^^^^^^^^^^^^^^^^^^
| |>
| |>  Does this work on 4D/20, /25, and /35's?  If not, what is the
| |>equivalent sequence for them?
| |>
| 
| The 4D/20's and 4D/25's that we have don't have a prom password. The sequence
| we needed to use to 'disarm' the prom password on the 4D/35's involved 
| taking the case apart and disconnecting the battery cable from the system
| board...which also seriously confuses all the other prom settings.

Wrong fix.  On the 30 and 35, it is trivial.  Open the cpu side of the
chassis (with power off).  Pull the narrow ribbon cable (not the 25
pair SCSI ribbon cable) that goes to the front panel where the nvram
resides (actually, it is a serial EEPROM, not nvram, but lets not quibble;
the battery has nothing to do with the nvram, by the way, it
is only for the RTC (Real Time Clock)).

Power the system on; stop in the prom monitor.
WITH THE POWER ON, plug the narrow ribbon cable
back in.  Type 'resetenv' to the PROM monitor.
Reset netaddr, and any other variables you care
about.

Turn the power off, close up the machine, and
boot normally.


With the Indigo's, this is all quite a bit harder to do,
because the EEPROM is much harder to get to (it is on the
backplane, behind the cpu board).

--
Let no one tell me that silence gives consent,  |   Dave Olson
because whoever is silent dissents.             |   Silicon Graphics, Inc.
    Maria Isabel Barreno                        |   olson@sgi.com