[Coco] Trying to ID CoCo 1 board.
afra at aurigae.demon.co.uk
Wed Mar 8 19:27:49 EST 2006
Now I have fixed the problem with the keyboard on this machine I want to
try and upgrade it to 64K, it's currently at 16K, and I have a bunch of
spare 4164s, and socketed RAM chips so why not :)
Anyway I'm trying to ID the version of the board, and cannot work out
which version it is, the number under the cartrage port is :
The board does have 6 jumpers, some marked 4/16m, others 16/64 and the
high/low one I know that the 16/64 ones will have to be in the 64
position to ensure the correct voltage/address line routing and I know I
will have to fit R83, which I presume is in Z7 from the SAM. However I
don't know if I'll have to make any other patches to enable 64K.
I can probably dig out my digicam and take a piccy if that would help ID
Pictures here : http://daria.bio.warwick.ac.uk/~bshu/CoCo/
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
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