Dr. Sepulveda came into prominence in the 1980s as the president and chief scientist of Protologic Entertainment. In 1986, Sepulveda designed and built the Protologic 68000 - or 68K for short - a ground-breaking computer with the most innovative design ever seen in a microprocessor system. However, a long string of technical problems leading up to launch saw the failure of the 68K. Protologic Entertainment shut down, and Dr. Sepulveda became a recluse.