[Coco] CoCo 3 68000/RAM board project

[jdaggett at gate.net]

A plugin GIME replacement is a real possibility.

It would take me a week or so to redo the board in Eagle and three weeks 
for fabrication and shipping. Then add another two months or more to finish 
the video section and test the core. 

After all that the final product will not have gold plated fingers to plug into 
the existing PLCC socket. For small quantity boards hard electroplated gold 
fingers is cost prohibitive. Other gold plating methods that are cheaper do 
not have durability of multiple plug in and out before the gold is worn off. 

All this will take into my time to accomplish what I want to do first. Maybe 
after what I have planed is done it will be short work to do a plug in GIME 
chip replacement. 


Good luck on your study of Motorola processors. The more the better. 


james

On 11 May 2009 at 0:40, Bookworm wrote:

> Ok, now I get it.
> 
> I was hoping for a replacement GIME chip to put in the CoCo 3, and
> maybe a CPU upgrade too. Your project sounds like a great idea, and
> I'd like to see it develop into something more general purpose if you
> have time.
> 
> Meanwhile, I'll keep studying Motorola chips and see what I can come
> up with. Don't hold your breath, I'll be doing good just to learn
> assembly language.
> 
> 
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