[Coco] Coco 1 263-3001 just goes to 'ok' prompt when turned on

Bruce W. Calkins brucewcalkins at charter.net
Fri Dec 6 19:19:22 EST 2013


That looks like common "D" or "E" board 64k upgrade wiring.  A spare gate on 
the 74LS02 is used for some sort of bank switch and the wires between the 
memory chips cover the extra address line that is not present on the board.
Bruce W.
==================

----- Original Message ----- 
From: "Jeremy Michea"

> Hmmm. Seems to be happening again so I took it apart and took a picture of 
> the board. Wires running everywhere. Not sure what was done here. Anyone 
> see anything odd about this setup? Sorry about the flash from the camera. 
> Hopefully it can be made out ok.
>
> http://i569.photobucket.com/albums/ss133/atarileaf/coco1board_zps9510d607.jpg
>
> -- 




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