Not all PC Unix releases were based on System III or System V. In 1992, Lynne and William Jolitz released 386BSD, a port of the 4.3BSD Net/2 codebase to PC-compatible computer systems using the Intel 80386 CPU. In 1993, a difference of opinions on the future direction of the project between the Jolitzes and other contributors led to the creation of two different BSD-based operating system efforts