Well, there are emulators out there. On the other hand, if you don't mind things being fast as well as simple, there are dead-simple hobby OSes out there for e

Well, there are emulators out there. On the other hand, if you don't mind things being fast as well as simple, there are dead-simple hobby OSes out there for exactly this sort of tinkering: http://news.ycombinator.com/item?id=1088617 http://news.ycombinator.com/item?id=1088617 I do remember the fun of PEEKing and POKEing with my TRS-80...