[Coco] 512k upgrade for coco3

[David Ladd]

There are two caps that need to be removed for any upgrade to 512K, 1M, 2M,
those rare larger boards.

Those two caps are only required if using the base 128K.

On Thursday, September 24, 2015, Walter Miraglia <walter.miraglia at gmail.com>
wrote:

> Hi there.   I am wondering,  if I am upgrading my coco3 with an older dual
> 30 pin sim based upgrade that uses dynamic ram sims, do I need to remove
> the two small caps (82 and 27 pf caps on the RAS and CAS lines)?  Or is
> that only for the 512k static ram upgrades triad one?
>
> I wonder as I am having issues with an old ram upgrade where basic ram
> tests seem to pass but more involved use of ram, running applications like
> donkey kong seem to crash.   I did remove those two caps and installed my
> 512k dram based ram upgrade.  I'm wondering if I should have left them?
> Should I solder in a couple and try it again?  ( I would have to order some
> )
>
> Please advise.  Any help appreciated.
>
> Sent from my iPad Mini
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