> I keep coming across references to is the S-100 bus. The S-100 bus originated in the Altair 8800, essentially as a direct copy of the 8080 (CPU) bus. From th

> I keep coming across references to is the S-100 bus. The S-100 bus originated in the Altair 8800, essentially as a direct copy of the 8080 (CPU) bus. From there, it took on a life of it's own, very much like the IBM PC's ISA bus did a few years later... there were companies building S-100 expansion boards for existing computers, new computer backplanes built around S-100, faster CPU's, etc. (IIRC, there were CPU's at least as fast as a Motorola 68020... so quite away from it's more humble 8080 origins.) S-100 was very important for it's time...