Rockwell NOS PPS-8/2 CPU.   Very rare NOS, working, unused from factory tube.  These are from my own stock of parts here in the USA.  We do not sell Chinese counterfeits. Taken from a 1975 magazine article: Rockwell International has announced two new microprocessor systems that form com plete 8-bit microcomputers on only two chips Designated the PPS-8/2 family, both sys tems provide two-chip microcomputers with CPU, one automatic serial and 16 parallel I/O ports, l6-bit interval timer, three level interrupt, clock circuit, 64 x 8 RAM ar and either 1024 x 8 or 2048 x 8 ROM. Both use 109 instructions. A 3.5 rnHz crystal is the only component required. The PPS-8/2 CPU chip (PiN 12806) contains logic for system operations, math and data manipulations, and can respond to three uni que interrupt request lines to provide 15 sub-level interrupts.