Mon Feb 3 11:52:56 EST 2020

general remarks

I'm on the right path, but this will need a whole lot of work to find
good factorization primitives, and to maybe also create a processor in
such a factored way.

EDIT: A PLC would probably be possible

1. Factor out the instruction sequencing: instruction memory
   interface, loops and call/return.

2. Allow user to plug in conditional jumps (input->control path) and
   instruction decoders (instruction->output path).