[rescue] Sparc 20 Diag question

[Peter Stokes]

Hi

Just a little add on to this.

I am often struggling to find enough larger men DIMMs for the SS20. The
501-2480 is the official 64Mb DIMM, but you can use the later 501-3136 128Mb,
but it will only be recognised as 64MB, however they appear plentiful as they
were used in many of the Ultra class systems. There is one issue however and
that there were essentially two styles of 3136, one appears to have some form
of regulator on it and that does not work. The one without it is the one that
works. You will not damage the SS20 if you try the one with the regulator, it
just will not be recognised.

Peter

Sent from my iPad

> On 12 Dec 2019, at 03:27, Steve Hatle <shatle at nfldinet.com> wrote:
>
> o;?And the verdict is bad RAM in slot 0. Moved things around and the machine
came right up.
>
> I'll have to dig around and see what other DIMMs I have to fill this guy up
- minus the VSIMM which I'm going to put back in and play with, even though
there's a CG6 in the machine, and I have a few TGXs sitting around.
>
> Thanks for the reminder on cooling for the SM71s.B  I have 8 SM81s in my
SS1000E. It's a lot of fun :-)
>
> Steve
>
> Chase Rayfield wrote on 12/11/19 1:07 PM:
>> Also, you'll fool yourself into thinking the wrong slot is zero they don't
go in order... check page 36 of the service manual. Slot 0 is the one furthest
from the sbus/mbus slots.
>>
>>
https://docs.oracle.com/cd/E19127-01/sparc20.ws/801-6189-12/801-6189-12.pdf
>>
>> Also make sure you have extra cooling SM71s are much hotter than the stock
cards, I don't have any personally but they are some of the hottest modules as
far as I know you don't want those modules to die from overheating SM71s are
semi rare much rare than SM81s ironically. I have SM81s in mine but there is
an extra fan in there and few other cards.
>>
>> I think a lot of people go for the SM71s as a max upgrade so they disappear
quickly since people don't realize you can run SM81s as they aren't officially
compatible. SM71s and SM81s were only sold in Sparcservers I think since those
have hefty cooling.
>>
>> Chase
>> _______________________________________________
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