Fast MBus modules

[Lyle Bickley]

On Tuesday 31 July 2007 19:03, Scott Quinn wrote:
> > > I picked up a pair of SM91-2's on eBay years ago. They do indeed
> >
> > work in
> >
> > > an SS20 -- for a while. Then I think the heat catches up with them...
> > > Every time I installed them (I must've tried singles and pairs) it
> >
> > would
> >
> > > be fine, I'd go do something else, and I'd come back to a locked up
> >
> > machine.
> >
> >
> > I have had the same experience with 80MHz CPUs in my SS20. I finally
> > had
> > to settle for 2x50MHz and some stability instead.
> >
> > Steve
>
> Hmm- anyone managed to get the SM81s to work reliably in a SPARCstation
> 20 SMP?
>
> I have a SS20/2xSM81 as my SMP Sun- haven't used it much yet but if in
> general they have stability issues I should probably do something else.

I ran a SS20 with Dual ROSS 125MHz CPUs. They got seriously hot. Also ran 
another SS20 w/Dual SR71s. Both the SR71 and ROSS needed an unique EPROM 
upgrade to run without "freezing" (hanging) the system. Perhaps that's the 
issue with your SM91-2 (as opposed to heat)???

You might want to post a query to the suns-at-home at net-kitchen.com list to get 
the EPROM upgrade if required for the SM91 (if someone else doesn't respond 
on this list with same). 

Cheers,
Lyle
-- 
Lyle Bickley
Bickley Consulting West Inc.
Mountain View, CA
http://bickleywest.com

"Black holes are where God is dividing by zero"