[Coco] Un-upgraded 3124 Multipak/Coco3 Question

[Mark Marlette]

Mike,

I hate to disagree with you after you agreed with me but.....

That is not exactly true. The GIME is buffered by the 244's. The MPI  
is buffered by the 245, so those two would fight for the data bus.

The GIME wouldn't be damaged the buffers possibly would be.

Mark
Cloud-9
http://wwww.cloud9tech.com

Quoting Mike Pepe <lamune at doki-doki.net>:

> I second that. Essentially the MPI and the GIME chip will respond to
> the same addresses. Reading is probably the worse of the two in terms
> of potential damage, since the GIME and MPI will be driving the data
> bus at the same time. It could potentially kill the GIME. Not likely,
> but it is possible.
>
> -Mike
>
> Mark Marlette wrote:
>> David,
>>
>> The MPI and CoCo3's memory map conflict. Depending on what the   
>> program is accessing for addresses, depends on the damage or   
>> possible damage.
>>
>> It is a real issue and should be a concern to non upgraded CoCo3 MPI owners.
>>
>> Mark
>>
>> Quoting David Grimmel <navydave1 at hotmail.com>:
>>
>>> I know I need to upgrade my white 3124 multi-pak to be 100% compatible
>>> with my Coco 3, but havent gotten around to it yet. While reading a
>>> Marty Goodman Q&A in the July 88 iss of Rainbow, he says, "even if your
>>> Coco 3 {appears} to work fine with your Multi-Pak, the upgrade is
>>> required. The upgrade may prevent slow, subtle damage to your Coco 3".
>>> I knew that using it un-upgraded my cause small glitches and software
>>> problems, but I didnt think it would cause any physical permanent
>>> damage. What damage is the good DR. referring to? Have I already
>>> damaged my Coco 3 by using it with an un-upgraded 3124 multi-pak?
>>>
>>> Dave
>>>
>>>
>>>
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>>
>>
>>
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