USB joystick adapter for 9 pin joysticks – Vintage is The New Old
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iCode Dual Atari Joystick, Paddle, Driving, and Trackball USB Adapter, Plus Edition
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USBJoy2.0E adapter - Extended Version. Connect your Atari Amiga C64 joystick to PC! Develop your own usb device! - Polish electronics for 3D printers, CNC, robotics, retro computers