Fujitsu MHT2080AH - 80GB 5400 RPM PATA Hard Drive Product Manual page 102

Interface
At command issuance (I/O registers setting contents)
1F7 (CM)
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (FR)
H
At command completion (I/O registers contents to be read)
1F7 (ST)
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (ER)
H
(12) IDENTIFY DEVICE (X'EC')
The host system issues the IDENTIFY DEVICE command to read parameter
information from the device. Upon receipt of this command, the drive sets the
BSY bit to one, prepares to transfer the 256 words of device identification data to
the host, sets the DRQ bit to one, clears the BSY bit to zero, and generates an
interrupt. After that, the host system reads the information out of the sector
buffer. Table 5.4 shows the values of the parameter words and the meaning in the
buffer.
At command issuance (I/O registers setting contents)
1F7 (CM)
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (FR)
H
5-32
1 0 0 1
x x x DV
xx
xx
xx
Number of sectors/track
xx
Status information
x x x DV
xx
xx
xx
Number of sectors/track
Error information
1 1 1 0
x x x DV
xx
xx
xx
xx
xx
0 0 0 1
Max. head No.
Max. head No.
1 1 1 0
xx
C141-E195-02EN