[rescue] Sparcstation 2 OBP password recovery

Mike Loewen mloewen at cpumagic.scol.pa.us
Wed May 13 20:15:37 CDT 2015

On Wed, 13 May 2015, Arno Kletzander wrote:

> Mouse <mouse at Rodents-Montreal.ORG> wrote:
>> (2) Remove the NVRAM and replug it live.  Downside: somewhat
>> hair-raising.
>> (...)
>> I've never dared try (2) and haven't considered (1) worth the expense
>> and bother, and I don't have the equipment for (5).
> I can't remember for sure what kind of machine this was on (I keep
> thinking it was a lunchbox, probably a Classic, but might also have been
> an Ultra 1) but for lack of other possibilities, I have done that very
> NVRAM live replug procedure once successfully (removed the password) and
> without collateral damage (didn't let out magic smoke).
> I think what you were supposed to do (and what I did) was to turn on
> power to the machine with the chip _already removed_, and reseat it
> once you had the OBP prompt.

    I tried that before doing the live-plug thing - it won't even get you 
to the Openboot prompt without the NVRAM installed.

Mike Loewen				mloewen at cpumagic.scol.pa.us
Old Technology				http://q7.neurotica.com/Oldtech/

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