[Coco] 512k upgrade for coco3

[Barry Nelson]

Before I assume it's a RAM issue, let me just ask…
Do you have a multi-pak? Were you using it? If so, is it patched for a CoCo 3?

On Sep 24, 2015, at 7:11 PM, coco-request at maltedmedia.com wrote:

> Date: Thu, 24 Sep 2015 18:24:57 -0400
> From: Walter Miraglia <walter.miraglia at gmail.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Subject: [Coco] 512k upgrade for coco3
> Message-ID: <B0166E5C-8B8D-4A57-AE7F-04C0B88ACEEE at gmail.com>
> Content-Type: text/plain;	charset=us-ascii
> 
> 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