Unknown and Unobtainable – Mystery Chips | The CPU Shack Museum

There are always interesting surprises when collecting CPUs, and anything really. There are those chips that are unicorns, or white whales, spoke of, maybe even documented but never (or almost never) seen. For example Hitachi made a copy of the Intel 4004 CPU. Its documented, and I think I have seen one in my life, but it’s certainly not a chip that you ever expect to see, it’s almost (I did say ALMOST) pointless to try to find one. They are, in a word, unobtainium.