[Coco] MPI 3126 upgrade

[Rogelio Perea]

Give me a couple of days and perhaps I can find the information your looking
for.

BTW - the 26-3126 catalog number listed in this thread does not sound off
like a valid MPI number. As far as I know (correct me if wrong), the MPIs
only came out under two RS catalog designations:

26-3024 - The big grey first and then off-white MPI
26-3124 - The sleeker one that matched very well the smaller CoCo 3 (and 3)
case.

As everyone knows, the 3024 upgrade is just a simple chip replacement. Some
3024s have PAL chips in there that cause no problems but were in the
upgrade-just-in-case category; I have used one of those in my CoCo 3 for
years with no evident issues in its operation, then again, my usage - even
in OS9 - has never pushed the machine to its limits like running telecom
programs, attending a remote terminal attached to it.

I had the instructions on the 3124 upgrade, single chip, few wires here and
there and a trace cut in the MPI board to disable some line in the custom
built ASIC chip. Should have the papers handy in my bookcase...

Stand by...


-=[ Rogelio ]=-



On 9/20/07, Chester A Patterson <vchester at setec-cr.com> wrote:
>
> That's the point. For the 3126 C9 needs to have the MPI sent there but
> for me it is prohibitive, I live in Costa Rica. I have no problem
> openning, cutting, tracing and soldering, I just need to know WHAT to
> do!
>
> -----Original Message-----
> From: Paul Fitch [mailto:pfitchjr at bellsouth.net]
> Subject: Re: [Coco] MPI 3126 upgrade
>
> Cloud9 sells the upgrade for 3024 and 3124.  I guess you would need to
> know how the 3126 differs from the 3124.