Date   : Tue, 13 Dec 2011 18:00:07 +0100
From   : kortink@... (John Kortink)
Subject: 32016 + 32082

On Sun, 11 Dec 2011 21:08:58 -0000, Mike Pepper <profpep@...>
wrote:

>[...]
>
>Mine is fitted with 32 x 256 bit RAM I've never seen a circuit diagram, and
>would be interested to know if it was possible to upgrade without the much
>bigger board, (there seem to be quite a few RAM links).

With a bit of thought, it can't be done with a simple
chip replacement. The 16 pin sockets support a maximum
of 9 address lines, which translates to a maximum of
2^(2*9) = 256 K addresses. We'd need one more address
pin to go to 1 M x 1 chips (i.e. 4 MB).

So only a plug-in contraption (plus probably some flying
wires) would do.

>[...]


John Kortink

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