IIRC, PS/2 mouse and keyboard ports are electrically identical, and the reason that they can't be used interchangeably is that addressing for PS/2 devices is ha

IIRC, PS/2 mouse and keyboard ports are electrically identical, and the reason that they can't be used interchangeably is that addressing for PS/2 devices is hardcoded at the software level, i.e. the BIOS always expects a keyboard connected to a specific port and a mouse connected to the other.