Four Phase Systems

Four-Phase Systems was a computer company, founded by Lee Boysel and others, which built one of the earliest computers using semiconductor main memory and LSI MOS logic. The company was incorporated in February 1969 and had moderate commercial success. It was acquired by Motorola in 1981With 12 in-house developed chips, including the AL1 microprocessor slice and a 2K DRAM, the company entered the distributed processor systems market in 1970.