Comment by kstenerud

The parallel cable for the keyboard reminded me of a hack I did back in the day, stripping wires from two SNES controllers and connecting them to a DB25 connector to plug into the parallel port of my PC running MAME. The cool thing with the parallel port is that you can control most of the pins individually, so it was pretty trivial to write a driver to send/receive the control messages the SNES controllers expected.