I got one response after I sent my previous summary of the answers to
this question, which said that it *was* possible to boost the total
RAM of an SLC, by replacing the 1-Mbyte SIMMs with 2-Mbyte SIMMs. I
did not post it immediately since it contradicted all other
respondents, but discussed it in more detail. Herewith (a bit late)
the relevant messages from our exchanges.
From: Wilson N G <noel@essex.ac.uk>
Date: Mon, 16 Dec 91 09:56:09 GMT
Message-Id: <8100.9112160956@sersun0.essex.ac.uk>
To: dan@BBN.COM
Subject: Re: Can a Sparcstation SLC have more than 16 Mbytes?
Sorry, it's a month or two since I looked at an SLC - I remembered 8 slots.
You must already have the 1M x 36 SIMMs and therefore need the 2M x 36 ones
each of which gives you 8Mb, hence 32Mb in total. Micron's # is MT24D236.
I asked whether noel had tried it:
From: Wilson N G <noel@essex.ac.uk>
Date: Tue, 17 Dec 91 09:49:59 GMT
Message-Id: <12722.9112170949@sersun0.essex.ac.uk>
To: dan@BBN.COM
Subject: Re: Can a Sparcstation SLC have more than 16 Mbytes?
No, I must admit that I haven't. I am certainly inclined to believe that it
would work, however, since as I understand it the proms determine simm sizes
by trial and error (put a pattern in consecutive addresses and search for it
at higher addresses; when it reappears, you've just wrapped). See if anyone
will sell you the SIMMs on a trial basis; they would have a vested interest
in finding out for themselves, since they could sell quite a few to people
in your position of being faced with a machine change if they don't work.
I'm not sure if Micron sell direct or not; they would be worth ringing since
they might be cooperative, or at least would give you names of distributors.
Let me know how you get on.
Unfortunately I don't have the time to try something no one else has
attempted (particularly since our particular SLC is heavily used
virtually 24 hours/day). But if anyone else would like to try it, I
would be very interested in the results. If anyone else knows for
certain that this won't work (and why), that would be interesting
information as well.
Dan Franklin
dfranklin@bbn.com
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