[Coco] Pardon me for asking...

[Charles Hudson]

I completed the procedure up to the point of performing the 64k 
addressing modification; in other words, "PRINT MEM" now shows 31015.  
As I don't have OS-9 or any way to load it I will wait until the updated 
ROMs arrive to modify further.

Thank you again for your assistance.

-CH-

On 12/8/2021 6:47 AM, Charles Hudson wrote:
> Thank you Mr. Boyle for your suggestion.  I will follow the procedure 
> outlined in Rainbow magazine, of which I was unaware.
>
> -CH-
>
> On 12/6/2021 4:39 PM, L. Curtis Boyle wrote:
>> 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-
>>>
>>> -- 
>>> Coco mailing list
>>> Coco at maltedmedia.com
>>> https://pairlist5.pair.net/mailman/listinfo/coco
>>>
>>
>