Last 2 weeks were very hard to the project... Almost no progress both in Logisim circuit design and breadboards.

I've hit a wall: it became almost impossible to code test programs directly in assembly (with no tool but the Excel to convert to machine code), so I started to develop a simple compiler for a very simplified version of C#. But it (as always) revealed far more dificult than appeared, and the estimated 2 or 3 hours of coding quickly became 10 and far from finish.

Hope to finish this in two weeks at most to return to the main project.

Estimate of completeness so far:
Logisim circuit design: 90%
Real circuit in breadboards: 20%
Compiler: 10%