Making a Joystick for C64 or Atari | Kosciusko Media
Control Port - C64-Wiki
Building a Paddle for Arkanoid, for the Commodore 64 - Valiant EN
C-64 Workshop / Pin Connections
Protovision - C64 Hardware Support/Tools/Software/Updates - 4 Player Interface C64
Interface - C64-Wiki
COMMODORE 64 128 User Port 4 player Joystick interface | eBay
digital joystick adapter for the PC
USB Joystick Adapters – breadbox64.com
2x) Internal Joystick port, connector built-in socket for Commodore 64/128 | eBay
commodore 64 - Would a multi button controller have been possible on the C64? - Retrocomputing Stack Exchange
Tezza's Classic Computers Articles and Projects - Blowing up and then fixing a Commodore 64
File:Commodore 64 - Joystickports, EinAus-Schalter, Poweranschluss.jpg - Wikipedia
Connectors Commodore 64 – My old computer
I added a vintage 9-pin port to my C64 mini, including working F-keys and extra buttons. Goodbye broken usb joystick! : r/c64
Commodore 64 Joyswitcher Review - Lyonsden Blog
Connectors Commodore 64 – My old computer
4 players adapter for Commodore 64 - Share Project - PCBWay
Problems Connecting an Arduino Uno to a Commodore 64 Joystick Port - Retrocomputing Stack Exchange
Connectors Commodore 64 – My old computer
Build your own Commodore 64 arcade stick - a guide - Retro Games Collector
