<And even more true in the S-100 world. Anybody who bought a system made <solely of parts from IMSAI or MITS and didn't use third-party memory or dis <controllers/systems was a total fool and completely ignorant of <the blossoming S-100 industry. Big time! The early versions *under sn ~2000 or so* had at lest a couple of pages of mods from MITS alone. Of the mods that were common for the 8800: *heavier PS *better backplane, theirs was the worst. *CPU clock mod to use the 8224 instead of ttl and oneshots. *MANY mods to 88mcd or 88s4k memory to make them work with some disk controllers. IMSAIs being about 6months later had fewer basic problems and a lesser need for mods just to work. Most S100 systems prior to ~1980 needed mods to allow for variations between bus interpretations. The altair being first needed the most mods for the newest boards. Allison