I saw it on a demo of a new Vorpal that Epyx was trying to sell. It used self modifying code on both the computer side as well as the drive side with some look up tables and using pre scrambled bytes which the serial transfer fixed. I dont think it was ever released and written by Scott Neleson. All copy protection companies were afraid of what it represented as they did not think it could get faster and said single rev transfer and read was impossible without losing 50% data storage, yet here was something which code store more than normal data on a disk and did it faster than anyone else thought possible.