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10.57 Write Stream DMA (3Ah)
Command Block Output Registers
Register
7
Data Low
-
Data High
-
Current
V
Feature
Previous
V
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
1
Command
0
Error Register
7
6
5
4
CRC
UNC
0
IDN
V
V
0
V
Table 189 Write Stream DMA Command (3Ah)
The Write Stream DMA command allows the host to write data using the DMA data transfer protocol. This
command allows for the host to specify to the device that additional actions need to be performed prior to the
completion of the command if the required bits are set.
If the Write Continuous bit is set to one, the device shall not stop execution of the command due to errors. If
the WC bit is set to one and errors occur in the transfer or writing of the data, the device shall continue to transfer
the amount of data requested and then provide ending status with the BSY bit cleared to zero, the SE bit set to
one, the ERR bit cleared to zero, and the type of error, ICRC, IDNF, or ABRT, reported in the error log. If the
WC bit is set to one and the Command Completion Time Limit expires, the device shall stop execution of the
command and provide ending status with BSY bit cleared to zero, the SE bit set to one, the ERR bit cleared to
zero, and report the fact that the Command Completion Time Limit expired by setting the CCTO bit in the error
log to one, In all cases, the device shall attempt to transfer the amount of data requested within the Command
Completion Time Limit event if some data transferred is in error.
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
V
V
V
V
V
V
V
V
V
V
V
V
V
1
1
D
-
-
-
-
0
1
1
1
0
1
0
3
2
1
0
0
ABT
T0N
CCTO
0
V
0
V
257
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
SE
DWE DRQ COR
0
V
V
0
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
IDX
ERR
-
0
-
V
- Quick Links:
- Data Sheet
- Jumper Settings(Pata Model)
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