Work in progress!!

Based on James Sharman's work here: https://www.youtube.com/playlist?list=PLFhc0MFC8MiCDOh3cGFji3qQfXziB9yOw

Build using Digital: https://github.com/hneemann/Digital

I have removed all LEDs and driver latches; nested modules don't show LEDs anyway. Added a bunch of probes instead.

Status:

• Added a 'terminal' and a termData register + mov termData,a
• Implemented the lods operation
• Implemented everything except a reset circuit
• ret might be broken, a jmp after a call fails; I suspect the PCRA flip might be to slow or just not working
• Does print Hello World once though! (: