"Michael J. Mahon" <mjmahon@aol.com> writes: > Since the Apple has no comprehension of wait states Sure it does! That's what the RDY line on pin 21 of the expansion slots is for. On older Apples with an NMOS 6502 (e.g., original, Plus, and unenhanced IIe), it only works on read cycles, but that's what you need for an EPROM. Eric