[Coco] Re: [Color Computer] CoCo 2 questions.

Phill Harvey-Smith dragon at aurigae.demon.co.uk
Thu May 12 16:04:47 EDT 2005

Glen VanDenBiggelaar wrote:
> Hi, Phill,
> What Model number is it?

26-3136A It is a UK PAL version tho.

> I have the service manual the 3026,3027. Upgrade instructions are on my 
> website (www.coco.8bit-micro.com) on the CoCo 2 page. yes, You want to 
> replace the chips with 4164 with 200 NS or better time (a good example is 
> TMM4164AP-20 ). I will look closer at the scematics for the other chips you 
> mentioned.

So looks like upgrade is indeed 2x41464, doesn't work at the moment, so 
if you (or anyon else) have a circuit for this model would be most 

Fault is vertical lines of @ down the screen, I suspect a data path 
fault, ie one of the LS chips that sits between Ram and VDG and RAM and 



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