Making a 9 Pin Joystick Cable (for Sega Genesis, Commodore 64, ColecoVision, Atari, etc.) - YouTube
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Retro 9 Pin Joystick to USB Converter : 4 Steps (with Pictures) - Instructables
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Atari ST
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File:Atari joy-port.svg - Wikimedia Commons
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Atari-style joystick to PC joystick adapter pinout description @ Pinouts.ru
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9pin Joystick Controller Cable for Atari 2600 Commodore C64 Vic-20 Ami – RetroArcadeCrafts
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General Purpose port - MSX Wiki
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![GUIDE] NES Gamepad to Atari Controller - sudomod](https://s20.postimg.cc/db6d4a6v1/tut_06.png "GUIDE] NES Gamepad to Atari Controller - sudomod")
GUIDE] NES Gamepad to Atari Controller - sudomod
C-64 Workshop / Pin Connections
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Making an xarcade to atari controller for the wii adapter | GBAtemp.net - The Independent Video Game Community
9 Pin Joystick to USB Adapter
