COMMODORE 64 128 User Port 4 player Joystick interface | eBay
Making a Joystick for C64 or Atari | Kosciusko Media
File:Commodore 64 - Joystickports, EinAus-Schalter, Poweranschluss.jpg - Wikipedia
Reading C64 Joysticks and Analog Signals (Programming Electronics with the Commodore 64 Part 3) - Retro Game Coders
Joystick interface for C-16, C-116 and Plus/4 - V1.1
4 players adapter for Commodore 64 - Share Project - PCBWay
Syntiac pages - Joysticks
C64 Joystick Port - GameDude Computers
digital joystick adapter for the PC
Build your own Commodore 64 arcade stick - a guide - Retro Games Collector
USB Joystick Adapters – breadbox64.com
Joystick interface for C-16, C-116 and Plus/4 - V1.1
Retro Isle - C64/128 Technical Section
Control Port - C64-Wiki
USB Joystick Adapters – breadbox64.com
Connectors Commodore 64 – My old computer
Tezza's Classic Computers Articles and Projects - Blowing up and then fixing a Commodore 64
File:Joystick Eingänge C64.jpg - Wikipedia
Protovision - C64 Hardware Support/Tools/Software/Updates - 4 Player Interface C64
Commodore 64 User Port Project Development PCB - Share Project - PCBWay
![Commodore Info Page - Articles: C64 - DTV2 with IEC, keyboard and joysticks [en]](https://www.commodore-info.com/foto/th_computer_c64_dtv2_14.gif "Commodore Info Page - Articles: C64 - DTV2 with IEC, keyboard and joysticks [en]")
Commodore Info Page - Articles: C64 - DTV2 with IEC, keyboard and joysticks [en]
GitHub - matsstaff/CDTV_PS2Mouse_Joy: Arduino PS/2 mouse and joystick adapter for Commodore CDTV
