Figure 130. Command Data Structure - Hitachi IC25N040ATCS04-0 - Travelstar 40GN 40GB UDMA/100 4200RPM 2MB 2.5" IDE Hard Drive Specifications

Command data structure
Description
Device Control register
Features register
Sector count register
Sector number register
Cylinder Low register
Cylinder High register
Device/Head register
Command register
Time stamp (milliseconds from Power On)

Figure 130. Command data structure

:
Data format of each command data structure is shown below.
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
Byte
1
1
1
1
1
1
1
1
4
12
178
Offset
00h
01h
02h
03h
04h
05h
06h
07h
08h