[Coco] Help with Nitros9 on SDC?

Don Barber don at dgb3.net
Fri Apr 30 21:49:56 EDT 2021

Hi folks, another data point on this: since two other folks said the 
image booted fine on their 6309 coco3, I went ahead and ordered a 6309, 
and got it installed tonight. And guess what? Same failure.

I'm really at a loss now. Obviously something is broken on my coco3 but 
can't figure out what. I'm getting the weird error 244 behavior in OS9 
after doing disk access, and the failure to boot the latest EOU 6.3 
beta, but all the stock commercial apps/games all seem to be fine.

Does anyone have any ideas?

Related: can someone point me to the disk image containing the utilities 
described in 
I see several diagnostic disks in the archive but they're all earlier 
versions, not for the coco3.



On 4/13/21 10:25 AM, Christopher R. Hawks wrote:
> On Tue, 13 Apr 2021 13:29:20 +0000 (UTC)
> Robert Gault <robert.gault at att.net> wrote:
>> I just downloaded that image to my COCOSDC and using my CoCo3 512k
>> 6309 unit, the 6809 file booted correctly.
>> Sent from AT&T Yahoo Mail on Android
>      Same image boots fine on my CoCo3 2meg (Cloud-9) 6309 computer.
> (And the md5sum matches as well.)
>>    On Tue, Apr 13, 2021 at 7:24 AM, Don Barber<don at dgb3.net> wrote:
>> I have not modified the image.
>> I downloaded it from
>> http://www.lcurtisboyle.com/nitros9/EOU_Beta601_(6809_ONLY)_01-23-2021.zip
>> The md5sum of the image is e9970d83991c7aebd5941527637a1930. I
>> confirmed these match on a fresh download of the zip and what is
>> written on my sdcard.
>> Thanks,
>> Don
>> On 4/12/21 11:30 PM, L. Curtis Boyle wrote:
>>> Looking at the boot screen, it looks like KrnP2 is missing from the
>>> OS9Boot file (and it’s absolutely required). KrnP3 (which is
>>> optional) is still there, but KrnP2 *has* to be  in the boot; it’s
>>> part 2 of the main memory handling core of NitrOS-9 itself.
>>> Did you modify the boot at some point?
>>> L. Curtis Boyle
>>> curtisboyle at sasktel.net
> Christopher R. Hawks
> HAWKSoft

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