[Coco] Pardon me for asking...

[L. Curtis Boyle]

Yes, that would be an “E” board, which officially supported 32K of RAM (and the jumpers should be labelled 4K, 16K, 32K - move them all to 32). With slight modifications, it will support the full 64K of RAM as well.

You can find the details here: https://colorcomputerarchive.com/repo/Documents/Magazines/Rainbow,%20The%20(OCR)/The%20Rainbow%20Vol.%2003%20No.%2010%20-%20May%201984.pdf
(go to page 50, where it says “E Board” under the “All the Way to 64K”).



> On Dec 6, 2021, at 5:40 AM, Charles Hudson <charles484 at twc.com> wrote:
> 
> Mr. Boyle asked:
> 
> "Do you know which version of the motherboard that you have (C,D,E, F (285))? That will make a difference on jumper settings and whether you have to do more than just move jumpers. "
> 
> The board is screened with "8709137-E" on the component side near the cartridge bay, which I suppose to mean it is a revision E board.
> 
> -CH-
> 
> ____________________________________________
> 
> Do you know which version of the motherboard that you have (C,D,E, F (285))? That will make a difference on jumper settings and whether you have to do more than just move jumpers.
> 
> Sent from my iPhone
> 
> On Dec 5, 2021, at 4:40 PM, Charles Hudson<charles484 at twc.com>  wrote:
> 
> I have owned a Color Computer Model 1, catalog 26-3004, for about two months.  It came to me as a 16k machine with Basic 1.1 in ROM.  I already had a Color Computer Disk Drive and the interface card and wanted the machine to drive them.
> 
> For these weeks I have been reading the mailing list but this is my first post here.  I soon discovered that I needed to replace the 1.1 ROM and add Extended Color Basic for the purpose or communicating with the drive.  I also read that it was possible to exchange the CPU for an Hitachi and to replace the 4116 RAM with 4164.
> 
> I'm working on the ROM replacements; that's not completed yet.  I have replaced the CPU and the RAM, and the machine boots to the Tandy Basic 1.1 prompt, but when I issue the "PRINT MEM" command the result is about 14k.
> 
> Without going into long detail let me say I'm pretty sure I have the jumpers set wrong.  I'm writing to ask if anyone can point me to the correct configuration.  Thank you for your replies.
> 
> -CH-
> 
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