I grabbed this yesterday at goodwill. It looks like an HP-IB/floppy-IDE interface, but I can't find any references. HP model appears to be: 09L Rev C 09153-66511 or 2815 or 0TF0C07 or RSWKC3 The card has a bulkhead plate w/ HP-IB connector, address dial switch 0-9, and configuration dial switch 0-9. PCB itself is about 10" by 3" with a 1.5" by 3" cutout. There is a 34-pin male and a 40-pin male header and dip switches: TEST <--> NORM B <--> C 30/40 <--> 10/20 BOTH < 10/30 <--> 20/40 NO FLOPPY <--> FLOPPY What is it? Doc