He's basically built an emulator/VM that runs in OS-9. There was a lengthy discussion about the finer details on the CoCo list, but here is one of his videos demonstrating it running WordStar (wow flashback!):
https://www.youtube.com/watch?v=Ysn7Na60ZGA Date: Mon, 1 Jun 2015 08:50:14 -0700 From: [email protected] To: [email protected] Subject: Re: [M100] CPM? On Monday, June 1, 2015, Joe Grubbs <[email protected]> wrote: If it doesn't, we need a clever developer who is very intimate with the Model 100/200 architecture and the 8085 to port it :) Someone in the Color Computer community ported CP/M to run under OS-9 on the 6809. If that can be done, it seems that getting it to run on an 8085 would be plausible. How can that be? I think typical CP/M programs require an 8080 compatible CPU. The 6809 is not. -- John.
