At the same time, a student in Michigan named Carl Mueller Jr. was independently working on reverse engineering the Intellivision. With the help of Intellivision ROM dumps from Sean Kelly and then William Moeller and Scott Nudds, Carl was able to create the first Intellivision emulator that plays the games on a modern computer. Sean was fortunate to have two Intellivision prototype cartridges with standard 8-bit EPROMS as opposed to the more complex memory mapped ROMS used by standard cartridges. William and Scott were able to dump the Intellivision embedded executive control software and graphics ROMS, as well as build a cartridge reader to dump any Intellivision cartridge.