5/18    On a DOS PC, how can software either detect if the floppy drive motor
        is spinning, or turn the motor off?  Is there BIOS API for that?  If
        not, how do I talk to the hardware directly.  Any pointers?  Thanks.
        \_ There's the "hand on case" interface as well as the "sonic sensor"
           unit built in to most end user units.
           \_ Huh?