This isn't a standard floppy drive controller; it's a low-level device that allows you access the disk at the raw, magnetic domain kind of level. This means it

This isn't a standard floppy drive controller; it's a low-level device that allows you access the disk at the raw, magnetic domain kind of level. This means it can read or write all kinds of formats that are typically not accessible on standard floppy controllers like "variable speed" systems used on old 400/800KB Mac disks.