INT 13H 0cH: Seek Cylinder

                                                                   [XT] [AT]
 Expects: AH    0cH
          CX    track (cylinder) number; see below
          DL    drive: 80H-81H=hard disk 0-1
          DH    head number
 Returns: AH    BIOS disk error code if CF is set to CY
    Info: This moves the read/write head directly to a specified track.

       CX Bits 6-7 of CL are the high two bits of the 10-bit value whose
          low 8 bits are in CH.  See INT 13H 02H for details.

   Notes: ž It is not necessary to use this seek function before any other
            functions (such as read, write, format or verify).

          ž This is used mainly in benchmark tests and diagnostic programs.

See Also: INT 13H: BIOS Disk I/O
          BIOS Data Area
          ROM-BIOS Functions