Anyone happen to know: a) The correct voltage* for the supply to the HDA (ST506), b) Whether the comms cable is wired straight through? (This for an Apple /// Profile - I'm not sure if the Lisa variant is different in this regard). I'm pretty sure I just used a straight-through cable many years ago, but confirmation would be nice. * I'm getting +16VDC on the one here (with the logic supply given a suitable dummy load so that it produces a regulated +5VDC). I don't particularly want to toast the HDA if that's supposed to be something like 12VDC... possible that the supplies are essentially separate I suppose, and the HDA output needs its own load before it'll regulate properly. I thought there was a service manual for the Profile (Lisa or /// I'm not sure) floating around a decade or so ago - doesn't seem to show up under Google though and it's not on bitsavers :-( cheers Jules