IBM DTCA-24090 Hard Drive Specifications - Page 118

Identify Device DMA

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12.7 Identify Device DMA (EEh) Command Block Output Registers Register 76543210 Data Feature Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 1D Command 11101110 Command Block Input Registers Register 76543210 Data Error ...See Below... Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status ...See Below... Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000V00 Status Register 76543210 BSY RDY DF DSC DRQ COR IDX ERR 0V0 0 V Figure 67. Identify Device Command DMA (EEh) The Identify Device DMA command requests the device to transfer configuration information to the host. The device will transfer the same 256 words of device identification data by the Identify Device command(ECh) via DMA channel. 110 OEM Specifications of DTCA-2xxxx 2.5 inch H D D

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12.7 Identify Device DMA
(EEh)
Command Block Output Registers
Command Block Input Registers
Register
76543210
Register
76543210
Data
Data
Feature
Error
...See Below...
Sector Count
Sector Count
Sector Number
Sector Number
Cylinder Low
Cylinder Low
Cylinder High
Cylinder High
Device/Head
1
1D
Device/Head
Command
11101110
Status
...See Below...
Error Register
Status Register
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC UNC
0
IDN
0
ABT T0N AMN
BSY RDY DF
DSC DRQ COR IDX ERR
0
0
0
0
0
V
0
0
0
V
0
0
V
Figure 67. Identify Device Command DMA (EEh)
The Identify Device DMA command requests the device to transfer configuration information to the host.
The
device
will
transfer
the
same
256
words
of
device
identification
data
by
the
Identify
Device
command(ECh) via DMA channel.
110
OEM Specifications of DTCA-2xxxx 2.5 inch HDD