I have acquired an old "kit" computer, circa 1977. The CPU has a trademark like a double script N, slanted to the right, with one superimposed on the other. Most of the other 10 or so smaller chips have the same mark. Adjacent to this is the number 804 (the CPU ID?) Other numbers are ISP-8A, /500D and SC/MP. It is the size and shape of a Z80 or 8085 Anyone have any idea what this is? Thanks Hans