[Coco] CoCoFest DownUnder!

[Mark Marlette]

Nick,

How about just a 512k CoCo3 PAL and a CoCoSDC???

The only caps on the TRAID are for power supply filtering. A digital design.

Hopefully Darren can shed some light on to why/what the CAP mod is doing on the CoCoSDC.

The TRIAD requires that the analog caps on the RAS/CAS lines(digital) need to be cut.


Regards,

Mark



________________________________
 From: Nick Marentes <nickma2 at optusnet.com.au>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com> 
Sent: Monday, March 31, 2014 2:44 PM
Subject: Re: [Coco] CoCoFest DownUnder!
 

On 1/04/2014 5:35 AM, Mark Marlette wrote:
> Nick,
>
> Interesting read.
>
> As far as the Triad goes. There is no difference in the timing of the SRAM under 128K or over 128K, it is the same.
>
> The GIME controls the timing to the SRAM/DRAM. Did the memory test pass on the suspect PAL CC3?  If so, then it is not the Triad.
>
> Was the second machine a PAL CoCo3 as well?
>
> I have never had a PAL CoCo to test things out on. I have several Triads down under and this is the first report of something not running on them.
>
>
> Wonder if there is something in the timing of the CoCoSDC?
>
>
>

Not sure. Both CoCo's were PAL.

The CoCoSDC may be sensitive. There is a documented mod to make it work 
on a CoCo1 which requires clipping a cap (I think) so maybe it is 
something similar.

Anyone else with a CoCoSDC and a Triad board?


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