I demonstrate that you can easily use a classic controller or joystick such as a Mega Drive/Genesis controller to work on Retropie using a 9 Pin Joystick to USB adapter from Monster Joysticks with minimal setup. Any controller with a standard DB9 connector should work such as Amiga, Atari or Sega controllers. Links to website where you can purchase and support down below.
Buy Here: https://monsterjoysticks.com/9-pin-joystick-to-usb-adapter
Supoort: https://monsterjoysticks.com/support/
How To Use An Original Controller On Retropie
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