Specifications

52 AMD Geode™ GeodeROM Functional Specification
Non-Removable Media
32087C
6.2.8 Function 0Ch - Seek to Cylinder
Description:
Moves the drive’s read/write head to the caller-specified cylinder. In modern systems, it is used primarily for testing the
performance of the drive.
Supports:
Fixed disk only.
Passed:
Returns:
Special Instructions:
In modern drives, a Read/Write/Verify command causes the drive to seek to the caller-specified cylinder automatically.
However, this function remains a favorite of disk performance benchmark applications.
Related Functions:
INT 13h "Function 01h - Get Disk Subsystem Status" on page 46.
Parameter Description
AH 0Ch
DL Drive number
DH Head number
CH Bits [7:0] = Cylinder bits [7:0]
CL Bits [7:6] = Cylinder bits [9:8]
Parameter Description
CF 0 = Success
1 = Failure
AH Status code: See AH in "Function 01h - Get Disk Subsystem Status" on page 46