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11.20 Read Multiple Ext (29h)
Command Block Output Registers
Register
Data Low
Data High
Current
Feature
Previous
Current
Sector Count
Previous
Current
Sector
Number
Previous
Current
Cylinder Low
Previous
Current
Cylinder High
Previous
Device/Head
Command
Error Register
7
6
5
4
CRC
UNC
0
IDN
0
V
0
V
Table 118 Read Multiple Ext Command (29h)
The Read Multiple Ext command reads one or more sectors of data from disk media, and then transfers the data
from the device to the host.
The sectors are transferred through the Data Register 16 bits at a time. Command execution is identical to the
Read Sector(s) command except that an interrupt is generated for each block (as defined by the Set Multiple
command) instead of for each sector.
HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
7
6
5
4
3
2
1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
-
1
-
D
-
-
-
0
0
1
0
1
0
0
3
2
1
0
ABT
T0N
0
V
0
Command Block Input Registers
0
Register
-
Data Low
-
Data High
-
Error
-
V
HOB=0
Sector Count
V
HOB=1
V
HOB=0
Sector
Number
V
HOB=1
V
HOB=0
Cylinder Low
V
HOB=1
V
HOB=0
Cylinder High
V
HOB=1
-
Device/Head
1
Status
0
7
6
AMN
BSY
RDY
0
0
V
159
7
6
5
4
3
-
-
-
-
-
-
-
-
-
-
...See Below...
-
-
-
-
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
-
-
-
-
-
...See Below...
Status Register
5
4
3
2
DF
DSC DRQ COR
0
V
-
0
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
-
-
-
1
0
IDX
ERR
-
V
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