Could I suggest to those that can afford it, to have two of their critical S-100 boards. I don’t know how many times my second (backup) S-100 boards saved my neck over the years. There is real comfort falling back to a known working Z80, RAM, ZFDC and/or dual ID, and console IO boards. If they are identical with a broken board simple chip replacements quickly gets to the bottom of a problem. Particularly the first two boards.
Hi Jeff! Thanks! You are down for one each S-100 ConsoleIO and S-100 MS-DOS Support board as soon as they are available!