The Heathkit/Zenith ET-3400 trainers with 6800s, and the accompanying Heath/Zenith coursework, were fantastic in 1982. 50+ of us completed it that year, the class final was bit-banging the tune of "Anchors Away" as the instructor was a Navy officer and educator, retired to civilian teaching. I later learned machine language on broken superscalar mainframes as bit-chaser, but the 6800 were simply fantastic devices and prepared me well. Flat, shared memory, von Neumann architecture. Very nice op codes and indexing, as I recall. Ill have to go back to my coursework and reminisce...