I might mention how all this got started; a sort of cautionary tale.  It was a few months ago that I came across several boxes of 800 KiB floppies, entirely unreadable by any of my hardware and which contained a lot of my stuff from the Old Days.  Having had a lot of electronics experience including repairs and upgrades of classic Macs, I didn't hesitate to buy a bunch of old Apple gear which included the aforementioned three computers.

Perhaps I was too confident that I could fix any stiction problems.  And maybe I should have gotten just the PM 7600 (purchased after the three Macs) instead.  But I kind of like the old 68K Macs from having used them so long that I felt I could make space for at least one of them in my home (and in my budget).

Anyway, among my old diskettes are some software development tools including a Think C compiler.  I've been busy writing some totally new software and I'd thought it would be interesting to host it on a classic Mac just to prove the portability of the code.