[Andres] wrote in to share his USB for NES controller project (translated). It enumerates as a USB keyboard and is easily mapped on most emulators. Over the weekend we looked in on an AVR ...

2nes2usb is a firmware for Atmel ATmega8 and Atmega168 micro-controllers which allows one to connect up to 2 NES and/or SNES controllers to a PC using a single circuit. The device connects to an USB ...

Once the Arduino is plugged into USB and running its sketch (and the NES controller is hooked up,) you can start the C# application. It will open in a console window, and as long as it is running, NES ...

but then i googled around saw there was a kit you could get to solder up a usb joystick for macs and pcs out of the old nes controller. grab some emulators and you’ve got some up down a b select ...