Genesis / Famiclone to PC Engine controller converter

Hardware Connections

PC Engine Mini DIN8 Connections (Output)

PC Engine Pin	RP2040 GPIO
1 (5V)	5V
2 (Up/A)	GPIO26
3 (Right/B)	GPIO27
4 (Down/Sel)	GPIO28
5 (Left/Start)	GPIO29
6 (SELECT)	GPIO14
7 (ENABLE)	GPIO15
8 (GND)	GND

Genesis or Famiclone DB9 (Input)

DB9 Pin	RP2040 GPIO
1	GPIO7
2	GPIO2
3	GPIO1
4	GPIO0
5	GPIO8
6	GPIO3
7	GPIO4
8	GND
9	GPIO6