[Coco] eBay MPI Heads Up

[Arthur Flexser]

I'd think the easiest would be to try it with a CoCo 3 and PEEK $FF90 with
the switch in both positions.  The position that yields the correct value
for a CoCo 3 modified MPI should be the CoCo 3 position.  Neither position
should hurt the CoCo 3 if the mod is working correctly, though to be on the
safe side I'd turn off the CoCo and MPI before flipping the switch.  I
vaguely recall that the CoCo 3 value of the peek should be zero, but I may
be misremembering.

Art

On Fri, May 29, 2015 at 7:30 PM, K. Pruitt <pruittk at roadrunner.com> wrote:

> Here's a picture of the innards.
>
> https://www.dropbox.com/s/i9xwgxtwwibbs6l/DSC01405.JPG?oref=e
>
> As suspected, it contains a mod to allow it to be used with a Coco 1/2 or
> a Coco 3.
>
> The board was apparently manufactured by Marty Goodman as it has his name
> on the board. Some of the traces show signs of repair.  I'll take a loop to
> it later prior to testing. I have no clue as to which position of the
> switch is which. But there may be detailed information about Marty's mod on
> the Internet. I seem to recall seeing it somewhere. If not on the 'net then
> in Rainbow.
>
> Thanks Bill.  Much appreciated.
>
>
> ----- Original Message ----- From: "Bill"
> Sent: Friday, May 15, 2015 4:17 AM
> Subject: Re: [Coco] eBay MPI Heads Up
>
>
>  I'm the seller. Unfortunately, I can't claim anything, except that it's
>> grey. I got the MPI in a lot purchase a few months ago, but my health will
>> not let me continue much research into it, so I am selling the entire lot
>> of stuff. I only responded because I saw mention of another one, and
>> thought mine would be less expensive.
>>
>> Who knows, it might be VERY valuable. :)
>>
>>
>
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