A project for the original Xbox based on the OGX Mini by Wired Opposite ( https://github.com/wiredopposite/OGX-Mini ). It adds support for USB controllers on the Original Xbox. I'm using it with some PS4 and Xbox360 controllers.
 

• Rp2040 ( I'm using this one here )
• 2x RES 27Ohm 5% 1/8W 0805
• 1 USB TYPE-A SINGLE PORT RIGHT ANG
• OGX mini interposer board (optional ) zip here. You can instead wire the D+/D-  manually to pins 10+11 on the RP2040 (Like this )
• Xbox to USB Female cable