Thank you for the advice Bad-a-Bily. I am planning to use the Ultimarc driver outside of the Mame/GameEx environment to drive a machine to punch holes in paper tape for a ~200K file. Would LEDblinky handle 200K frames? Also could someone explain how to access the Ultimarc driver directly through C++/Python/DOS etc; as I suspect I will need to build a program to accomplish this?