How to build an Amiga Joystick to USB adapter (DB9 to USB) - Retro32
commodore 64 - Would a multi button controller have been possible on the C64? - Retrocomputing Stack Exchange
Atari joystick port - Wikipedia
Connectors Commodore 64 – My old computer
Build your own Commodore 64 arcade stick - a guide - Retro Games Collector
Vintage Set Of 2 Kraft One Button 4/8 Way Joystick Controller Commodore / Atari 4437130200 | eBay
Joystick - DenialWIKI
Amiga Controller Gamepad Commodore 64 Control Pad Power Stick - Etsy
Joystick 2 button mod questions - English Amiga Board
Pin out for a MAME Controller Hack | Retropie arcade, Bartop arcade plans, Arcade room
C-64 Workshop / Pin Connections
Retro 9 Pin Joystick to USB Converter : 4 Steps (with Pictures) - Instructables
Hedaka Multi-Function HED-1 Joystick - Lyonsden Blog
Reviving an old joystick with an Arduino Leonardo | It's Every Bit For Itself
2nd button Amiga joystick - English Amiga Board
Joystick information and circuits
Joystick interface for C-16, C-116 and Plus/4 - V1.1
NES and SNES Controllers on a 6502 (like the C64) – pagetable.com
Obsolescence Guaranteed: Converting the 'Commodore 64' DTV
Reading C64 Joysticks and Analog Signals (Programming Electronics with the Commodore 64 Part 3) - Retro Game Coders
Commmodore, Atari, Amiga 9-pin DIY Game Controller - Share Project - PCBWay
Atari CX40 joystick - Wikipedia
The Atari joystick Pinout Common Ground. - Atari 8-Bit Computers - AtariAge Forums
A Keypad Joypad For Your Retro Gaming | Hackaday
9pin Joystick Controller Cable for Atari 2600 Commodore C64 Vic-20 Ami – RetroArcadeCrafts
