[PC] [XT] [AT]
Expects: AH    00H
Returns: AH    BIOS disk error code if CF is set to CY
Info: Forces a recalibration of the diskette and hard disk controller.

It places head 0 to track 0 of all drives.

After an unexpected disk error, use this, then retry the

DOS fn 0eH (reset disk)
- -

INT 13H 00H: Reset Drive