Table of Contents
Advertisement
10.49 Write DMA Ext (35h)
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
V
0
0
V
Table 181 Write DMA Ext Command (35h)
The Write DMA Ext command transfers one or more sectors of data from the host to the device, and then the
data is written to the disk media.
The sectors of data are transferred through the Data Register 16 bits at a time.
The host initializes a slave-DMA channel prior to issuing the command. Data transfers are qualified by DMARQ
and are performed by the slave-DMA channel. The device issues only one interrupt per command to indicate
that data transfer has terminated and status is available.
If an uncorrectable error occurs, the write will be terminated at the failing sector
HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1.1)
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
-
1
-
D
-
-
-
0
1
1
0
1
0
3
2
1
0
0
ABT
T0N
AMN
0
V
0
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
Status Register
7
6
5
BSY
RDY
DF
0
V
0
241
7
6
5
4
3
2
-
-
-
-
-
-
-
-
-
-
-
-
...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
-
-
-
-
-
-
...See Below...
4
3
2
1
DSC
DRQ
COR
IDX
V
-
0
-
1
0
-
-
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
-
-
0
ERR
V
- Quick Links:
- Data Sheet
- Jumper Settings(Pata Model)
Hide quick links:
Advertisement
Table of Contents
