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    This function should be called after a failed floppy disk Read, Write,
    Verify, or Format request before retrying the operation.
 
    If called with DL >NM =80H (i.e., selecting a fixed disk drive), the
    floppy disk controller and then the fixed disk controller are reset. See
    also Int 13H Function 0DH, which allows the fixed disk controller to be
    reset without affecting the floppy disk controller.
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