I don;'t know if it'd be of any help, but I built my own trasnputer-based
hardware about 15 years ago. That's ARD-style building, with soldering
iron and 'scope, not just plugging a few TRAMs together :-).
Anyway, I syspect a lot of this would very easily come back to me, and I
certainly still have all the databooks, and for that matter, some real
hardware, here.
Feel free to ask me stuff if you think I might know the answers. The
worst that can happen is 'I haven't a clue!'
-tony