[Coco] CoCo 1 64K upgrade failed :(.

[Mike Pepe]

Phill Harvey-Smith wrote:
> Ryan Pritchard wrote:
>> Hi all,
>>
>> The CoCo does not boot.  I have cut all eight of the correct 
>> capacitors C31, C35, C45, C48, C61, C64, C67, C70, moved all the 
>> jumpers to the 32K setting, and tried both the LOW and the HIGH back 
>> jumper positions.
> 
> Did you check the voltage pins with a meter before plugging in the 64K 
> rams, IIRC 4116s (which would be in for the 16K), use +5V, +12V, and -5V
> applying the +12/-5 to the 4164s will almost cirtainly fry them (managed 
> to do this by mistake once, and the magic smoke definatly exscaped :( ).
> 

Phill,

I'm reasonably certain that the 4116's are +5V only. I know for sure the 
4K RAMs also needed -5 & +12V