I'm trying to install 2 YD-580 360k half height floppy drives into my IBM 5150 so that I can have a hard drive in one bay and still have 2 floppy drives. However, when I try to access them, both floppy drives act in unison. Even when the BIOS probes them, both fire up at the same time. When I boot into DOS and go to A: the same thing happens. Is there a jumper setting on the drives I need to change?