11.21 Read Multiple Ext (29h)
...See Below...
Status
0 0 1 0 1 0 0 1
Command
- - - - - - - -
Device/Head
- 1 - D - - - -
Device/Head
V V V V V V V V
HOB=1
V V V V V V V V
Previous
V V V V V V V V
HOB=0
Cylin-
der
High
V V V V V V V V
Current
Cylin-
der
High
V V V V V V V V
HOB=1
V V V V V V V V
Previous
V V V V V V V V
HOB=0
Cylin-
der
Low
V V V V V V V V
Current
Cylin-
der
Low
V V V V V V V V
HOB=1
V V V V V V V V
Previous
V V V V V V V V
HOB=0
Sector
Number
V V V V V V V V
Current
Sector
Number
- - - - - - - -
HOB=1
V V V V V V V V
Previous
- - - - - - - -
HOB=0
Sector
Count
V V V V V V V V
Current
Sector
Count
- - - - - - - -
Previous
...See Below...
Error
- - - - - - - -
Current
Fea-
ture
- - - - - - - -
Data High
- - - - - - - -
Data High
- - - - - - - -
Data Low
- - - - - - - -
Data Low
7 6 5 4 3 2 1 0
Register
7 6 5 4 3 2 1 0
Register
Command Block Input
Registers
Command Block Output
Registers
V
–
0
–
V
0
V
0
V
0
V
0
V
0
V
0
ERR
IDX
COR
DRQ
DSC
DF
RDY
BSY
AMN
T0N
ABT
0
IDN
0
UNC
CRC
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Status Register
Error Register
Figure 127. Read Multiple Ext (29h)
The Read Multiple Ext command reads one or more sectors of data from disk media, 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.
Deskstar 180GXP hard disk drive specifications
151
Summary of Contents for Deskstar 180GXP
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