All done: the shift/jump unit backplane is now complete. I think it turned out pretty darn good, all things considered.
|I got these plastic snap-in feet from Jameco. Must simpler than trying|
to scrounge up brass standoffs and screws.
|I'm very happy with how the silkscreen came out. It's surprisingly|
legible, and I'm shocked it lined up as well as it does, given
that I had to align it pretty much blind.
The A/B register bus simulator will just be a board with 32 DIP switches (16 for bus A and 16 for bus B) and a little control logic to set the outputs to hi-Z when the write signal is not asserted. This will let me test whether the board actually works, before having actually constructed a working register file.