SS/N64/PS2 Controller Adapter For PC USB
From Videogame Interface Wiki
Adaptor for connecting Saturn, N64 and PS2 controllers to a PC via USB. Only one controller will work at a time.
Compatibility
- Sega Saturn Twin-Stick works fine.
- PlayStation Analog Joystick does not work fine.
Button Assignment
You can changed button assignment:
- Saturn - To use the D-pad for the X/Y axes hold Start and A for 3 seconds.
- N64 - To swap the functions of the D-pad and the stick hold Start and A for 3 seconds.
- PS2 - 'Press ANALOG, Left Stick is X/Y Analog Axis mode, Right Stick is Z Axis mode, and D-Pad is POV and BUTTON mode.' I don't understand this, so've just quoted it directly — rjt (talk)
Source: https://www.flashbackltd.com/products/ps2-n64-saturn-controller-adapter-to-pc-usb