Homemade USB adapter for 9 pin Atari C64 Amiga Joysticks - YouTube
I added a vintage 9-pin port to my C64 mini, including working F-keys and extra buttons. Goodbye broken usb joystick! : r/c64
LOGIC 3 PC SPRINT PAD VINTAGE PC JOYPAD 15-PIN REF: JT265 | eBay
Converting the “Competition Pro Extra USB” to C64/Amiga/Atari DB9 – pagetable.com
USB Joystick Adapters – breadbox64.com
Atari joystick port - Wikipedia
Commodore Joystick Video Game Controllers for sale | eBay
C64 - The C64 Mini (Electronic Games) & Speedlink Competition PRO EXTRA USB Joystick - Digitaler Joystick mit DirectInput und Mikroschalter, schwarz-rot : Amazon.de: PC & Video Games
USB Joystick Adapters – breadbox64.com
I added a vintage 9-pin port to my C64 mini, including working F-keys and extra buttons. Goodbye broken usb joystick! : r/c64
Amazon.com: MAYFLASH 15 pin Controller Adapter for PC USB
Using Modern Nintendo Controllers On The C64 | Hackaday
Joystick Controller for Commodore - Commodore 64 Brain
Arduino Project: Commodore 64/Amiga, Atari 2600/XL/ST, ZX Spectrum Joystick to Windows/Linux (RetroPie) USB | jfrmilner's Tech Blog