[XT] [AT]
Expects: AH    11H
DL    drive: 80H-81H=hard disk 0-1
Returns: AH    BIOS disk error code if CF is set to CY
Info: This positions head 0 head of the specified hard drive over
track 0.

Notes:   This is automatically performed by reset fns 00h and 0aH.

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INT 13H 11H: Recalibrate Drive