[Coco] Sugestions for new NitrOS-9 versions

[James L. Mazurek]

On Wed, 2 Apr 2014, RETRO Innovations wrote:

> On 4/2/2014 8:31 PM, James L. Mazurek wrote:
>> On Wed, 2 Apr 2014, RETRO Innovations wrote:
>> 
>> ... Previous list of sugestions snipped.
>> 
>>> 
>>> I know this is a CoCo list, but there was a long ago effort to port OS/9 
>>> to the Commodore SuperPET, and I would love to see this codebase run on 
>>> that environment. It's not a feature per se, but would be a neat target.
>>> 
>>> Jim
>> 
>> I'd find an OS-9 port to the SuperPET an interesting project. Just a note 
>> there is a working SuperPET within the Chicago Classic Computing group. I'm 
>> sure if we aske Jack nicely he might be convinced to tote it out to 
>> CoCoFest for examination.
> Well, if someone wanted to play with getting it to work, VIC supports the MMU 
> board as of v2.4
>> 
>> Any clue how OS-9 might handle the odd memory switching to get at the extra 
>> 64K?  I'm not sure if memory mapping works differently in 6809E mode.
> http://mikenaberezny.com/hardware/superpet/super-os9-mmu/
>
> Jim

I had forgotten about the existence of that board.  It provides an all 64K 
RAM memory map for the 6809 mode of the SuperPET?

I'm guessing it is not possible, compatible or practical to use the 
PET 8X96 method of providing additional memory.

-Jim Mazurek