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10.21 Read Multiple Ext (29h)
Command Block Output Registers
Register
7
Data Low
-
Data High
-
Current
-
Feature
Previous
-
Current
V
Sector Count
Previous
V
Current
V
Sector
Number
Previous
V
Current
V
Cylinder Low
Previous
V
Current
V
Cylinder High
Previous
V
Device/Head
-
Command
0
Error Register
7
6
5
4
CRC
UNC
0
IDN
0
0
0
V
Table 130 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 P7K500 Hard Disk Drive specification (Rev 1.1)
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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
1
0
1
0
0
1
3
2
1
0
0
ABT
T0N
AMN
0
V
0
0
170
Command Block Input Registers
Register
7
Data Low
-
Data High
-
Error
HOB=0
-
Sector Count
HOB=1
-
HOB=0
V
Sector
Number
HOB=1
V
HOB=0
V
Cylinder Low
HOB=1
V
HOB=0
V
Cylinder High
HOB=1
V
Device/Head
-
Status
Status Register
7
6
5
4
BSY
RDY
DF
DSC
0
V
0
V
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
...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
V
V
V
V
V
V
V
V
V
V
V
V
-
-
-
-
-
-
-
...See Below...
3
2
1
0
DRQ COR
IDX
ERR
-
0
-
V
- Quick Links:
- Data Sheet
- Jumper Settings(Pata Model)
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