[Coco] Interesting problem with multi-pak and CC3 and OS9L2 / Nitros9

[Zippster]

John,

You can find some information linked here on changes to the logic
you’ll have to make on your 26-3124 MPI.

<http://www.coco3.com/community/2010/05/26-3124-mpi-coco-3-upgrade-1/>
<http://www.cocopedia.com/wiki/index.php/Multi-Pak>

- Ed



 
> On Oct 3, 2016, at 11:01 PM, John R. Hogerhuis <jhoger at pobox.com> wrote:
> 
> On Fri, Sep 30, 2016 at 6:53 PM, John R. Hogerhuis <jhoger at pobox.com> wrote:
> 
>> I had done a peek &hff90 and got 126. Which my understanding is that is an
>> upgraded mpi.
>> 
>> But that is very interesting bit of data. One I don't know if that's
>> really a good test. Two I got it off eBay and it's seria number is before
>> it was fixed but I didn't upgrade myself.
>> 
>> -- John.
>> 
>> 
>> 
> Ok so I did some more testing... turns out I have another multipak, same
> model # and it returns 0 when I peek at &hff90.
> 
> So I don't think PEEK &HFF90 is reliable contrary to the test described at
> Cloud9.
> 
> Also, I didn't think to look before but the MPI that returns 126 on the
> peek still has the warranty sticker over one of the case screws. I opened
> it and as you might expect I don't see evidence of rework.
> 
> So bottom line is... my non-upgraded  26-3124 MPI is probably causing my
> compatibility issue with Coco 3.
> 
> So I need to resolve that. Hopefully I can figure it out myself, investing
> $40+s/h and shipping-hassle is a little steep.
> 
> Thanks all for the help.
> 
> -- John.
> 
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