Simple project to fit the Pi Zero and 2 Mega drive controller ports into an original mega drive game shell. So far I have managed to get 1 controller port wired and configured for use with Retro Pie using a Pi2 for prototyping. The 2nd port will be added as soon as it arrives!

The pin out for Mega drive controller to the GPIO took a while to figure out, always seemed to be one or 2 buttons that didn't seem to register. After a day of tinkering around I managed to get all buttons working using the following Pin to GPIO:

1. Pin 1 - GPIO 4 (UP)
2. Pin 2 - GPIO7 (DOWN)
3. Pin 3 - GPIO 8 (LEFT)
4. Pin 4 - GPIO 9 (RIGHT)
5. Pin 5 - 3.3 V
6. Pin 6 - GPIO 10 (FIRE 1)
7. Pin 7 - GPIO 14 (FIRE 3)
8. Pin 8 - Ground
9. Pin 9 - GPIO 11 (FIRE2)

Hardware so far:

Next Steps:

• Add and configure 2nd port for 2 player games.
• Wire both ports to perm-proto board for final installation
• Setup and configure Pi Zero for Retro Pi
• Install final hardware into Mega Drive game cartridge.