hello,
i've 'experimented' with a quad ross cpu configuration on a ss20
(2 x dual 125mhz rt626 with 1024kb cache).
they were running a quite long time without any problems but
one tragic day they did not come back online after a poweroff
and restart routine.....:-(
it seems that they getting to hot and did not survive the power on
routine where, which i suppose, some slightly higher current/voltage
is at work....???
another theory is that they could be damaged by voltage flickering
in the dc net......???

my questions: does anybody have similar experiences (maybe that is
a common behaviour)?
regular sparc cpus got fuses on their boards, what about the ross cpus?
maybe just a minor component like a resistor is burned and could be
exchanged. does anybody handled such a case before?

thanks in advance

lester

lester psigal <lesterpsigal@yahoo.de> wrote in message news:<bls3nl$dbje2$1@ID-111475.news.uni-berlin.de>...
> hello,
> i've 'experimented' with a quad ross cpu configuration on a ss20
> (2 x dual 125mhz rt626 with 1024kb cache).
> they were running a quite long time without any problems but
> one tragic day they did not come back online after a poweroff
> and restart routine.....:-(
> it seems that they getting to hot and did not survive the power on
> routine where, which i suppose, some slightly higher current/voltage
> is at work....???
> another theory is that they could be damaged by voltage flickering
> in the dc net......???
>
> my questions: does anybody have similar experiences (maybe that is
> a common behaviour)?
> regular sparc cpus got fuses on their boards, what about the ross cpus?
> maybe just a minor component like a resistor is burned and could be
> exchanged. does anybody handled such a case before?
>
> thanks in advance
>
> lester
I've had the heatsinks life off the CPUs when the nylon screws become
brittle and broke. This was noticed after moving the unit, but before
powering it up, so no harm was done.

I replaced the screws with metal one, but had to put an insulating
washing under one of them.

Dr. David Kirkby - email address is:
http://homepage.ntlworld.com/drkirkby/home-email.jpg