And even got it working (= the processor running and being recognised by the OS) only after a few hours of fiddling with the SMD. Goodbye cables! After adapting the firmware to the rearranged I/O wiring, all of my games worked without major issues. See a photo of the beauty after the break.
No longer on my “Things to do before I die” list:
- Lay out a PCB
- Solder a SMD chip
- Despair to get a microcontroller circuit to run