I recently aquired an HP 9133XV combination 3.5" floppy and 15M HD with an HPIB interface and Amigo protocol. I tried to use the drive with an HP 86B and an HP 85B computer. The floppy works fine but the computer will not recognize the hard drive. The HD seems to spin up normally. I tried an "INITIALIZE" command without success. Can the series 80 computers use this large drive? Does anyone know how to use the test function on the drive? Thanks