Hitachi 7K100 - Travelstar - Hard Drive Specifications page 111

ture.
The following symbols are used in the command descriptions.
Input registers
0 This indicates that the bit is always set to 0.
1 This indicates that the bit is always set to 1.
Head number. This indicates that the head number part of the Device/Head Register is an input parameter and
H
will be set by the device.
V Valid. This indicates that the bit is part of an input parameter and will be set by the device to 0 or 1.
Not recommended condition for start up. Indicates that the condition of the device is not recommended for start
N
up.
- This indicates that the bit is not part of an input parameter
Output registers
0 This indicates that the bit must be set to 0.
1 This indicates that the bit must be set to 1.
The device number bit. This indicates that the device number bit of the Device Register should be specified. Zero
D
selects the master device and one selects the slave device.
Head number. This indicates that the head number part of the Device/Head Register is an output parameter and
H
should be specified.
LBA mode. This indicates the addressing mode. Zero specifies CHS mode and one specifies LBA addressing
L
mode.
Retry. Original meaning is already obsolete, there is no difference between 0 and 1. (Using 0 is recommended for
R
future compatibility.)
Option Bit. This indicates that the Option Bit of the Sector Count Register be specified. (This bit is used by Set
B
Max ADDRESS command.)
V Valid. This indicates that the bit is part of an output parameter and should be specified.
x This indicates that the hex character is not used.
- This indicates that the bit is not used.
The command descriptions show the contents of the Status and Error Registers after the device has completed pro-
cessing the command and has interrupted the host.
Travelstar 7K100 Hard Disk Drive Specification
97