I'm not going to pretend I knew that.. Thanks Ludis, yours are always worth reading.!. Mike V > > >I found a data sheet for a 27C32B. It programs at 12.5 volts. The data > >sheet mentions that programming voltages above 14 volts will damage the > chip. > > > >So - it looks like I blew up this EPROM by trying to program it as a > >2732 and 2732A. > > > >--