IBM DBCA-203240, Specifications

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The following symbols are used in the command descriptions:
Output Registers
0 Indicates that the bit must be set to 0.
1 Indicates that the bit must be set to 1.
D The device number bit. Indicates that the device number bit of the Device/Head Register
should be specified. Zero selects the master device and one selects the slave device.
H Head number. Indicates that the head number part of the Device/Head Register is an
output parameter and should be specified.
L LBA mode. Indicates the addressing mode. Zero specifies CHS mode and one does LBA
addressing mode.
R Retry. Indicates that the Retry bit of the Command Register should be specified.
B Option Bit. Indicates that the Option Bit of the Sector Count Register should be specified.
(This bit is used by Set Max Address command)
V Valid. Indicates that the bit is part of an output parameter and should be specified.
x Indicates that the hex character is not used.
- Indicates that the bit is not used.
Input Registers
0 Indicates that the bit is always set to 0.
1 Indicates that the bit is always set to 1.
H Head number. Indicates that the head number part of the Device/Head Register is an
input parameter and will be set by the device.
V Valid. Indicates that the bit is part of an input parameter and will be set to 0 or 1 by the
device.
- Indicates that the bit is not part of an input parameter.
The command descriptions show the contents of the Status and Error Registers after the device has com-
pleted processing the command and has interrupted the host.
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O E M Specifications of DBCA-2xxxxx 2.5 inch H D D