Re: Ultra 60 NVRAM

On Thu, 30 Nov 2017 15:06:25 +0000
Jaap Boender <[email protected]> wrote:

> Hi all,
> 
> Not strictly a NetBSD question, but I imagine someone here must know
> the answer to this...
> 
> Trying to revive my Ultra 60 for NetBSD purposes, I found that the
> NVRAM battery had died.
> 
> I ordered a M48T59Y-70PC1 chip to replace it with, but after I
> changed it the machine refuses to boot (even the power LED doesn't
> come on).
> 
> The new chip is a -70PC1D rather than a -70PC1U. I don't think I've 
> fried anything - the machine still boots fine with the old NVRAM chip.
> 
> So, is the D rather than U significant? Is the chip just defective? 
> Should I do something to reset the NVRAM? (I tried Stop-N at boot,
> but that doesn't seem to have any effect)
> 
> any light shed on this appreciated,
> 
>    Jaap

I had a similar issue on Ultra10, had to get a new nvram module and
that needed to be programmed, i.e. a few lines of forth code in
openboot. Search on internet how to do it, maybe someone still has web
page with details.