I feel the need to also mention your OS that isn't CP/M, but does run on TI calculators: KnightOS[0]. It's fantastic, and fairly featured, and caused no end of

I feel the need to also mention your OS that isn't CP/M, but does run on TI calculators: KnightOS[0]. It's fantastic, and fairly featured, and caused no end of issues at the school where I was sysadmin'ing. The kids wrote some damn good programs and games on it. (Mostly with kpy). [0] http://www.knightos.org/ http://www.knightos.org/