Hi, maybe of no help but I am sure I had a WD1002-WX2 disc controller in my first PC, an Amstrad 1512. I can remember it having an onboard BIOS from which you could define exactly what type of disc it was, heads, cylinders etc. I used it to work with discs from 3MB up to 20MB or so. It would low level format the disc which was handy when I used to get given crashed drives and swap the platters around to get them working. Just blow out all the aluminium dust and off they went again. Not a good idea for data but ok for storing programs. Sure I still have the controller, but where????? Bob