[Coco] Seeking ECB Rom in the US

[Bruce W. Calkins]

The ROM jumpers labeled 64/128 should be set for the 64k ROM and the ROM 
might be a 24 pin unit in the 28 pin socket.  You will need to change them 
for the 27128 EPROM.  IIRC there is one jumper or solder pad to upgrade the 
RAM from 16k to 64k.  This one might also have 8 16 pin locations lacking 
sockets.  Unless there are socketed 16k by 1 chips the easy upgrade is 64k 
by 4 chips from an upgraded CoCo 3 replacing the two 16k by 4 chips.  The 
64k satellite boards that use the white sockets are rare.  Most 
people/CoCoNuts have not even seen one.  I have two! ;)



Bruce W.



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----- Original Message ----- 

From: "Sean James"

> This model only has one 28pin ROM slot and there is a group of jumpers 
> nearby.
>
> So it looks like I will need a CB+ECB combo EPROM. Interesting. I guess 
> I'll be
> doing some jumpering too.
>
> --