Hi guys first time poster :)
Thought I wouldn’t bother with a new thread as this seems apt.
I tried posting on the EmulationStation forums without reply, and have done as much search as I can.
Am running Retro Pie 3 on a RPB with a NES USB controller
I’ve mapped the retroarch buttons everywhere I can within the interface and the ‘B’ registers, but in game for some reason the B button doesn’t work.