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Output Parameters To The Device
Sector Count
The number of continuous sectors to be transferred. If zero is specified, then 256 sectors will
be transferred.
Sector Number
This register specifies LBA address bits 0-7 to be transferred.
Cylinder High/Low
This register specifies LBA address bits 8-15 (Low) 16-23 (High) to be transferred.
H
This register specifies LBA bits 24-27 to be transferred.
R
The retry bit, but this bit is ignored.
Input Parameters From The Device
Sector Count
The number of requested sectors not transferred. This will be zero unless an unrecoverable
error occurs.
Sector Number
This register contains current LBA bits 0-7.
Cylinder High/Low
This register contains current LBA bits 8-15 (Low), 16-23 (High).
H
This register contains current LBA bits 24-27.
187
Hard Disk Drive Specification