Project update:

• as the post's title implies, Control Unit is now living on a PCB, a life form hundreds of years ahead of the breadboards, but not without some pain... As always there was a mistake on the PCB desing, but this time it wasn't my fault: the EasyEDA software has a trick (or more apropriatelly, a bug) and it doesn't connect wires in a specific situation, like this:

• Registers board was ordered today. As it is twice the size of the others (and three times the price) I took special caution to not make mistakes. I hope everything will be fine. Now the only thing to do is to wait, around 30 days for the board to arrive.

Thanks for reading.