Re: Ultra 60 NVRAM

On 11/30/2017 10:06 AM, Jaap Boender wrote:
> 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,

  If memory serves, these chips are shipped with the clock stopped, and
it must be started.  Very dusty neurons remind me that some systems
react poorly to a non-incrementing clock.  That might be it.

               -Dave

-- 
Dave McGuire, AK4HZ
New Kensington, PA