commodore 64 - Would a multi button controller have been possible on the C64? - Retrocomputing Stack Exchange
File:Atari joy-port.svg - Wikimedia Commons
PC joystick interface
Joystick information and circuits
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Retro Isle - Spectrum Joysticks
PSCD32 Peripheral Signal Conversion Device - Mathew Carr
How to build an Amiga Joystick to USB adapter (DB9 to USB) - Retro32
15-pin - Joystick-MIDI-port Layout
Atari 7800 joystick - Retronic DesignRetronic Design
amiga joystick – TruMouse.com
Retro 9 Pin Joystick to USB Converter : 4 Steps (with Pictures) - Instructables
Joystick Electrical connector D-subminiature RS-232 Commodore 64, joystick, angle, white, electronics png | PNGWing
Joystick - DenialWIKI
D SUB9 <> DIN Joystickadapter for VP/O2
Joystick interface for C-16, C-116 and Plus/4 - V1.1
Converting the “Competition Pro Extra USB” to C64/Amiga/Atari DB9 – pagetable.com
Connectors Commodore 64 – My old computer
Atari-style joystick to PC joystick adapter pinout description @ Pinouts.ru
Dragon 32 Joystick adapter | Vrai's Retro Stuff
Joystick 2 button mod questions - English Amiga Board
Reading the Sega Mega Drive / Genesis control pads | PICAXE Forum
How to connect old Atari style joystick to bluetooth PCB? - Electrical Engineering Stack Exchange
CSEE4840 PROJECT
