re motorola xc rc and rc in article sgberg xu charon bloomington in us sgberg charon bloomington in us stefan berg writes i don t know why my fpu has an xc my original mhz fpu was label mc but it seems to work fine on my system p s or does it mean experimental chip instead of motorola chip the rule for the designations is that if it says mc that means it works exactly the way the datasheet book specifies if it says xc that means there is at least one known bug often these bugs are small and obscure you might never run into them in practice at least motorola admits it unlike certain other companies all work is one man s work henry spencer u of toronto zoology kipling henry zoo toronto edu utzoo henry
