From: Ethan Dicks (ethan.dicks_at_gmail.com)
Date: 2006-07-13 10:55:00
On 7/13/06, Ruud@baltissen.org <Ruud@baltissen.org> wrote:
> Also interesting: I found the schematics of the 64 KB add-on card to turn a
> 8032 into a 8096... All memory expansion boards I know had
> this Motorola chip onboard. This one has an Intel D3242 onboard. And the
> datasheet could be found on the Internet !!! This all means that now we
> have a good chance to build our own expansion board.
I would certainly think that any new designs would use SRAM, not DRAM,
but at least knowning how the D3242 works will help understanding how
the existing CBM expansion board works.
I don't see a problem with a pair of 62256s or other 32K SRAM (like
old 32Kx8 cache RAMs from old PC motherboards), but there are larger
(and less common) SRAMs than 32Kbytes, if chip count or board size is
an issue.
-ethan
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