The EXT-IO is only used on Dance Dance Revolution SuperNOVA and up as well as Dancing Stage Fusion (The only DDR game on the Python 1). While DDR X and up up as well as Dancing Stage Fusion REQUIRE the EXT-IO in order to boot and function, Dance Dance Revolution SuperNOVA 1 & 2 can bypass this requirement by jumping pins 1 & 6 on the stage light connectors for both players and flipping DIP 2 on the Python 2 IO board to place the game into MANUFACTURER mode. In the mode, on boot the games will show a FOOT PANEL error but will still boot. The stage IO check and foot panel lights will be nonfunctional in this configuration.