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10.46 Write Buffer (E8h)
Command Block Output Registers
Register
7
Data
-
Feature
-
Sector Count
-
Sector Number
-
Cylinder Low
-
Cylinder High
-
Device/Head
1
Command
1
Error Register
7
6
5
4
CRC UNC
0
IDN
0
0
0
0
Table 178 Write Buffer Command (E8h)
The Write Buffer command transfers a sector of data from the host to the sector buffer of the device. The sectors
of data are transferred through the Data Register 16 bits at a time.
The Read Buffer and Write Buffer commands are synchronized such that sequential Write Buffer and Read
Buffer commands access the same 512 byte within the buffer.
HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1.1)
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
D
-
-
-
-
1
1
0
1
0
0
0
3
2
1
0
0
ABT T0N AMN
0
V
0
0
Command Block Input Registers
Register
7
6
Data
-
-
Error
Sector Count
-
-
Sector Number
-
-
Cylinder Low
-
-
Cylinder High
-
-
Device/Head
-
-
Status
Status Register
7
6
5
4
BSY
RDY
DF
DSC DRQ COR
0
V
0
-
236
5
4
3
2
1
0
-
-
-
-
-
-
...See Below...
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
...See Below...
3
2
1
0
IDX
ERR
-
0
-
V
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