File:Atari 800XL joystick ports (72RHA AT8489594 I-474).jpg - Wikimedia Commons
Retro Isle - Spectrum Joysticks
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Atari joystick port - Wikipedia
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Amazon.com: USB Adapter for Atari Joystick, Paddle, Driving by iCode, Four Port Multiplayer, Pro Edition : Video Games
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raphnet. - Genesis/SMS/Atari controller to USB adapter
iCode Dual Atari Joystick, Paddle, Driving, and Trackball USB Adapter, Plus Edition
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TV game joysticks
Atari joystick port - Wikipedia
D SUB9 <> DIN Joystickadapter for VP/O2
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Use Atari Paddles with Your PC - Gaming Hacks [Book]
Atari 2600 Controller Port Replacement (New Source) - Hardware - AtariAge Forums
Bulkhead / Shroud Mount Female Solder DB9 D-Sub Connector - Joystick Port Atari Sega etc.
General Purpose port - MSX Wiki
Rewiring your +2/+3 Joystick Ports to Atari Standard - Spectrum for Everyone
