Odyssey 2 Joystick Controller Gamepad Joypad DB9 Style Plug for DB9 Ports Only | eBay
What's the best DB9 (Atari 2600, 7800, ColecoVision, Sega Master System, Genesis, Odyssey2, C64, etc.) original controller to USB adapter in 2021? : r/RetroPie
Resurrect your DB9 joystick, Mayflash USB Adapter Review – Vintage is The New Old