[Coco] MC6829 Memory Management Unit

[Joel Rees]

2022年10月11日(火) 9:04 Dave Philipsen via Coco <coco at maltedmedia.com>:

> Yes, I was just following the original thread from Walter. I don't think
> he mentioned anything about a two task limit for OS9. We all know that
> OS9 manages up to 32 tasks. We was referring to a two task limit in the
> GIME hardware. And his comparison of maximum memory between the GIME and
> the MC6829 was correct. GIME=512K, MC6829=2048k
>

The app note has a bit of rather awkward wording that makes it sound, if
you're not reading carefully, like it requires 8 of the 6829s to actually
address the full 2M. It also says the MMU has to be "reprogrammed" to get
around that max or something like that, which is more unfortunate wording.

Talking about shouldas, I should have offered to rewrite that for them back
in 1981.