Examples exist of reading the N64 controller’s state with an Arduino, which could form the basis of a man-in-the-middle approach of “Yell To Press B” (or anything else) instead of soldering ...
Nintendo historians may recall that the N64’s controllers had an expansion port on the bottom where you would connect such accessories as the “Rumble Pak” and “Controller Pak”.
The N64 controller also features a slot for a Rumble Pak. Furthermore, the NES / SNES and Genesis controllers can also be used on PC or Mac. The N64 controller is slated to launch this summer ...