A 'back burner' project I have in mind is to repair an old HP-125 computer I picked up at a thrift shop quite a while ago. This computer has no onboard storage drives, instead coming paired with an HP-82901M floppy drive unit , which communicates over HPIB/GPIB/IEEE-488 (whatever you want to call it). These drives are either pure unobtanium, or are downright bankrupting, so I need to find a way to emulate it. My requirements are as follows: Standalone operation, not requiring another computer to emulate Low cost parts, or using mostly parts I have on hand (Optional) Multiple uses, I don't want this to be a one-trick pony While I've learned how the GPIB protocol works, I have no idea what the command set is that either the HP-125 and/or HP-82901M speaks. I've found mention of the HP-82901M using the Amigo command set, as introduced with the HP-300 "Amigo", on this page about emulating an Amigo-compatible drive with a modern PC . That project requir