[SunRescue] Bad - new NVRAM/TOD??

[rescue at sunhelp.org]

> Hi Steve--
> 
> Yeah, I experienced the same thing and posted a message about it in December. 
> Since then, I've found out two additional data points.  I originally ordered
> 200 NS chip for my IPX from Mouser and got the TOD error you reference.  I
> ordered a 70 NS version of the same chip (also from Mouser) and got the same
> results.
> 
> Then I ordered the 150 NS version of the M48T12 from JDR Microdevices (they
> don't carry the M48T02), and it worked like a champ.  They're $16.99 each from
> JDR, rather than $12.80 from Mouser for the M48T02.  Mouser also carries the
> M48T12 chip, also at $12.80, but I haven't tried it (yet).  
> 
> So, despite what the NVRAM FAQ says, it looks like the MT48T12 chip is the one
> to use.  All the chips I've been playing with are from the same manufacturer,
> so it's not a vendor problem.
> 
> The ones that did NOT Work:
> 
>    Manufacturer: ST  Label: M48T02-70PC1
>    Manufacturer: ST  Label: M48T02-200PC1
> 
> The one that DID Work:
> 
>    Manufacturer: ST  Label: M48T12-150PC1
> 
> I will sware that I successfully used an M48T02 on an IPC a while back. 
> Anyone out there have an IPC with a dead NVRAM chip willing to experiment with
> one of these chips?  I'll send a free chip to the first one who volunteers!

Harry,

I have several IPCs with dead NVRAM :^) .

I just installed one M48T02-200PC1 from Mouser.  Haven't booted it yet.  I 
will report back to the list about the TOD results.

-- thanks, Steve Pacenka
   email: spacenka at lightlink.com or sp17 at cornell.edu