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

[Darren A]

Did you also make sure that the R83 pins have a jumper or resistor
connecting them?

Darren

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On 9/25/08, Ryan Pritchard <coconut at pritchard.ca> wrote:
> Hi all,
>
> I followed the instructions for the 32K / 64K upgrade that I was
> provided.  I compared all 3 to 4 versions including a 32K only one.
> The nice part was the 32K only upgrade was the same steps for the 64K
> upgrade sans some extra jumper wires.
>
> I only got as far as having desoldered my 64K x 1 DRAM from my extra
> Apple //e 80 Column Card, and following the steps up to the end of the
> 32K upgrade instructions.
>
> 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.
>
> I think I may have burnt out the 64K x 1 DRAMs.  I don't know what
> else it could be and since I removed all eight caps breaking a couple
> in the process I can't return to the 16K system :(.
>
> I guess my options are find a good set of 64K x 1 DRAM, or cut my
> losses and pick up a CoCo 3 from Cloud 9.
>
> Currently kinda frustrating because the Extended Color Basic ROM I got
> confirmed the FDC works.
>
> Regards,
>
> Ryan Pritchard