[Coco] Reboot problem with latest NitrOS-9 build

[Robert Gault]

Boisy G. Pitre wrote:
> Robert,
>
> I think this is due to the work that Brett Gordon did to boot the OS using CoCoBoot.  I noticed this behavior too.
>
> I've been unable to get hold of Brett.  He hasn't been answering his emails.
> --

Perhaps, but I've got a hint of what the problem is by using the MESS debugger 
on an old version of NitrOS-9 vs a current one.

I set a watch point in MESS at $FFFE (RESET), started NitrOS-9, and then did a 
"Soft Reset". I followed the code from $FFFE to $8C1B to $C000 etc. Everything 
was normal.
The same procedure with the latest nightly build, got to $C000 and shortly 
thereafter was interrupted by an NMI. This should not happen!

Something in the new NitrOS-9 system code is generating an NMI when there should 
not be one. When I followed the NMI routine, I eventually saw the code try to 
process garbage and the system crashed.

I'm not sure how to proceed on this since it doesn't make any sense to me.