[rescue] Ultra 2 NVRAM - failed fix

[Peter Stokes]

Hi Ian

The original was a 59 but they have been NLA for many many years, as part of my work refurbishing Sun systems  I replaced many of them in this era of system with the 58 which just worked and hence my comment. The only systems the 58 will not work in are the later OBP 4.x based systems where I produced an adapter board for a later Dallas chip as none of the 28 pin chips still available will work successfully.

Peter

Sent from my iPad

> On 29 Oct 2024, at 12:46, silcreval via rescue <rescue at sunhelp.org> wrote:
> 
> Hi Jon - it looks like it is OBP 3 on this machine so the MKP prompt appeared to work. If I reset (rather than power down) the mac values are displayed in the title screen. It's just power off where everything is lost.
> 
> Hi Ethan - the chip appears to work in situ, but doesn't save its settings. I tried the watch-clock command and that worked as expected (the second timer showing)
> 
> Hi Peter - you mentioned a M48T58 - although this is definitely fitted with a M48T59. I wonder if the chip has been replaced previously with the wrong type? I've ordered a new M48T58 so will see if that works.
> 
> Thanks for the help all, much appreciated.
> 
> - Ian
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