Amazon.com: Two 6FT 9 Pin Replacement Cable Cord Wires to Repair Commodore 64 C64 Controller : Video Games
How to connect old Atari style joystick to bluetooth PCB? - Electrical Engineering Stack Exchange
Fancy Joystick for Atari 2600, Commodore 64, VIC-20, 128... - Hackster.io
Joystick Controller for Commodore - Commodore 64 Brain
Control Port - C64-Wiki
The Atari joystick Pinout Common Ground. - Atari 8-Bit Computers - AtariAge Forums
Joystick with 2 button support - English Amiga Board
C64 USB Joystick Adapter : 4 Steps (with Pictures) - Instructables
Converting the “Competition Pro Extra USB” to C64/Amiga/Atari DB9 – pagetable.com
Commodore 64 Joystick Switcher (Revision C) - Share Project - PCBWay
Joystick interface for C-16, C-116 and Plus/4 - V1.1
Joystick information and circuits
Retro 9 Pin Joystick to USB Converter : 4 Steps (with Pictures) - Instructables
Atari 2600 / Atari 8-bit / Commodore 64 Custom Joystick - Etsy
![Commodore Info Page - Articles: Input devices [en]](https://www.commodore-info.com/foto/th_info_input_02.gif "Commodore Info Page - Articles: Input devices [en]")
Commodore Info Page - Articles: Input devices [en]
Problems Connecting an Arduino Uno to a Commodore 64 Joystick Port - Retrocomputing Stack Exchange
commodore 64 - Would a multi button controller have been possible on the C64? - Retrocomputing Stack Exchange
Vectrex Controller to Atari 2600 Adapter - CNK
C-64 Workshop / Pin Connections
3D-Printing a Joystick and a Paddle Controller (While Waiting on my C64 Parts)—Sven Krasser's Blog
Vectrex Controller to Atari 2600 Adapter - CNK
PC joystick interface circuits
