[Coco] Pardon me for asking...

[Charles Hudson]

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-