Calling ApleII experts......

the I seem to recall it's necessary to be a bit careful with this - the original Apple II series (II, II+) used ROM ICs that were basically pin-compatible with standard EPROMS, but had an inverted enable line or something of the sort. Clone manufacturers simply used normal EPROMS. Hence, even if the actual contents of a clone EPROM is the same as the original Apple II ROM, you can't swap the two and have it work. It's a pity I can't remember the exact details; anyway, the practical upshot is that you can't use clone EPROMSs in real Apple IIs, or vice versa. Exception time: I once had an Apple II clone that used actual Apple ROM, it must have been licensed. The brand was Med Fly (yes, weird, these machines were sold into hospitals and doctors' surgeries). Mike.