Device Configuration Overlay (B1H); Device Configuration Restore (Subcommand C0H); Figure 76. Check Power Mode Command (E5H/98H); Figure 77. Device Configuration Overlay Features Register Values - IBM IC25N040ATCS04 - Travelstar 40 GB Hard Drive Specifications

13.2 Device Configuration Overlay (B1h)

Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0

Figure 76. Check Power Mode Command (E5h/98h)

Individual Device Configuration Overlay feature set commands are identified by the value placed in the
Features register. The table below shows these Features register values.
Value
C0h
C1h
C2h
C3h
other

Figure 77. Device Configuration Overlay Features register values

13.2.1 DEVICE CONFIGURATION RESTORE (subcommand C0h)

The DEVICE CONFIGURATION RESTORE command disables any setting previously made by a DEVICE
CONFIGURATION SET command and returns the content of the IDENTIFY DEVICE or IDENTIFY
PACKET DEVICE command response to the original settings as indicated by the data returned from the
execution of a DEVICE CONFIGURATION IDENTIFY command.
7 6 5 4 3 2 1 0
- - - - - - - -
1 0 1 0 V V V V
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - D - - - -
1 0 1 1 0 0 0 1
4 3 2 1 0
IDN 0 ABT T0N AMN
0 0 V 0 0
DEVICE CONFIGURATION RESTORE
DEVICE CONFIGURATION FREEZE LOCK
DEVICE CONFIGURATION IDENTIFY
DEVICE CONFIGURATION SET
Reserved
Travelstar 60GH & 40GN hard disk drive specifications
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
7 6 5 4
BSY RDY DF DSC
V V V -
Command
112
7 6 5 4 3 2 1 0
- - - - - - - -
see below
V V V V V V V V
- - - - - - - -
V V V V V V V V
V V V V V V V V
- - - - - - - -
see below
3 2 1 0
DRQ COR IDX ERR
V - - V