INT 13H 0cH: Seek Cylinder
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