DIY paddle controller? : r/Atari2600
Atari 2600 Joystick Low Profile Switch Mod - YouTube
Transforming Atari 2600 Controller - Hackster.io
Joystick - DenialWIKI
Rewiring your +2/+3 Joystick Ports to Atari Standard - Spectrum for Everyone
Vectrex Controller to Atari 2600 Adapter - CNK
Sega Mega Drive / Genesis 3-Button (A,B,C) Controller – Raspberryfield – IT, video games and comics
Atari Compendium
Atari joystick port - Wikipedia
Atari 2600 on a breadboard, part II: reading a cart - chester's blog
commodore 64 - Would a multi button controller have been possible on the C64? - Retrocomputing Stack Exchange
A simple Atari 2600 joystick tester circuit
Building the Circuit | AtariFruit 2600 Joystick | Adafruit Learning System
9pin Joystick Controller Cable for Atari 2600 Commodore C64 Vic-20 Ami – RetroArcadeCrafts
File:Atari joy-port.svg - Wikimedia Commons
Atari 2600 paddle controller schematics
The Atari joystick Pinout Common Ground. - Atari 8-Bit Computers - AtariAge Forums
Vectrex Controller to Atari 2600 Adapter - CNK
Joystick information and circuits
Project | Control Freak | Hackaday.io
Atari 7800 joystick - Retronic DesignRetronic Design
