[Coco] CoCo 3 Prototype - Reverse Engineered

[Joel Ewy]

Phill Harvey-Smith wrote:
> Nickolas Marentes wrote:
>> Allen Huffman wrote:
>>
>> Nothing new to report. Mark is willing to dissect it once he takes
>> care of his obligations with existing products.
>>
>> Who else might we turn to for this task?
> ...
>> I can contact Sock to see if he has time.
>>
>> It will need to have those stickers removed off the IC's though. 
>
> Please make note of them/take high quality pictures, incase they have
> some significance that we don't yek know.
>
>>                                 This shouldn't be a problem since
>> those stickers are there only as some debugging aid and deface the
>> board rather than give it any value.
>
> A good start would be a dump of any PLD/ROM devices on the board, and
> a list of all the components (ICs would be a good start). Plus some
> high quality pictures / scans, then at least people could work on
> trying to work out the schematics for it. Does it have a GIME or is it
> all TTL / CMOS / PLD ?
>

I have a universal device programmer of an appropriate vintage, and I
could read the PLDs (assuming security fuses haven't been blown...) if
the person who does the rest of the reverse-engineering doesn't have
this capability.

JCE
> At least we know what the final thing ended up like, so we know the
> achitecture of the machine, we know what it should do, reverse
> engineering the Dragon Beta was much harder, when I first looked at it
> there was only one known to exist non working board, the fact that we
> (the board's owner and I) got it working at all was a miracle....
>
> Cheers.
>
> Phill.
>