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5-18 C141-E192-01EN
D: The device parameter is valid, and the head parameter is ignored.
*O: Option (customizing)
D*: The command is addressed to the master device, but both the master device
and the slave device execute it.
X: Do not care
5.3.2 Command descriptions
The contents of the I/O registers to be necessary for issuing a command and the
example indication of the I/O registers at command completion are shown as
following in this subsection.
Example: READ SECTOR(S)
At command issuance (I/O registers setting contents)
Bit 76543210
1F7
H
(CM)00100000
1F6
H
(DH) x L x DV Head No. / LBA [MSB]
1F5
H
(CH) Start cylinder address [MSB] / LBA
1F4
H
(CL) Start cylinder address [LSB] / LBA
1F3
H
(SN) Start sector No. / LBA [LSB]
1F2
H
(SC) Transfer sector count
1F1
H
(FR) xx
At command completion (I/O registers contents to be read)
Bit 76543210
1F7
H
(ST) Status information
1F6
H
(DH) x L x DV Head No. / LBA [MSB]
1F5
H
(CH) End cylinder address [MSB] / LBA
1F4
H
(CL) End cylinder address [LSB] / LBA
1F3
H
(SN) End sector No. / LBA [LSB]
1F2
H
(SC) X’00’
1F1
H
(ER) Error information