Building a Paddle for Arkanoid, for the Commodore 64 - Valiant EN
Reading C64 Joysticks and Analog Signals (Programming Electronics with the Commodore 64 Part 3) - Retro Game Coders
Tube Time on Twitter: "the left one is a Commodore 1351 mouse designed for a C64/C128, while the right one is meant for an Amiga. the pinouts are very close and neither
Joystick with 2 button support - English Amiga Board
Connectors Commodore 64 – My old computer
Converting the “Competition Pro Extra USB” to C64/Amiga/Atari DB9 – pagetable.com
9pin Joystick Controller Cable for Atari 2600 Commodore C64 Vic-20 Ami – RetroArcadeCrafts
Connectors Commodore 64 – My old computer
C-64 Workshop / Pin Connections
General Purpose port - MSX Wiki
Atari joystick port - Wikipedia
Joystick interface for C-16, C-116 and Plus/4 - V1.1
Reviving an old joystick with an Arduino Leonardo | It's Every Bit For Itself
Control Port - C64-Wiki
Ultimate fix for the C64 Mini Joystick - Use any Atari or C64 Original joystick! - YouTube
The Atari joystick Pinout Common Ground. - Atari 8-Bit Computers - AtariAge Forums
COMMODORE C16 / PLUS 4 / C116 TO AMIGA OR ATARI JOYSTICK ADAPTER CABLE 705693506401 | eBay
Problems Connecting an Arduino Uno to a Commodore 64 Joystick Port - Retrocomputing Stack Exchange
Retro Isle - C64/128 Technical Section
The Keypad Joypad - Amiga, Atari, C64... | Hackaday.io