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Arduino Project: Commodore 64/Amiga, Atari 2600/XL/ST, ZX Spectrum Joystick to Windows/Linux (RetroPie) USB | jfrmilner's Tech Blog
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Amazon.com: SPEEDLINK SL-650212-BKRD Competition PRO EXTRA USB Joystick - Anniversary Edition, Retro-Arcade-Stick, schwarz-rot: Computers & Accessories
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Competition Pro USB Joystick + '99 Best of C64 Classix®' Games Collection, Jöllenbeck GmbH, Press release - PresseBox
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