Commodore 64 Joystick Mouse Controller Pad C64 9 Pin Extension Cable Lead - UK | eBay
GitHub - tebl/C64-Joystick-Adapter: A simple device that allows the connection of two Commodore 64 joysticks to a modern computer over USB (using an Arduino Pro Micro). The overall goal is to be
Homemade USB adapter for 9 pin Atari C64 Amiga Joysticks - YouTube