Write Dma Ext (35H); Table 126: Write Dma (35H) - Hitachi IC25N040ATMR04-0 - Travelstar 40GB Laptop Hard Drive 9.5mm 2.5 Inch Notebook HDD Specifications

13.43 Write DMA EXT (35h)

Table 126: Write DMA (35h)

Command Block Output Registers
Register
Data Low
Data High
Current
Feature
Previous
Current
Sector
Count
Previous
Current
LBA Low
Previous
Current
LBA Mid
Previous
Current
LBA High
Previous
Device
Command
Error Register
7 6 5
CRC UNC 0 IDN
V 0 0
The Write DMA Ext command transfers one or more sectors of data from the host to the device, 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.
Output parameters to the device
Sector Count Current The number of continuous sectors to be transferred low order, bits (7-0).
Sector Count Previous The number of continuous sectors to be transferred high order bits (15:8). If zero is speci-
LBA Low Current
LBA Low Previous
LBA Mid Current
LBA Mid Previous
7 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
- 1 - D - - - -
0 0 1 1 0 1 0 1
4 3 2 1
0 ABT T0N AMN
V 0 V 0
fied in the Sector Count register, then 65,536 sectors will be transferred.
LBA (7-0)
LBA (31-24)
LBA (15-8)
LBA (39-32)
Travelstar 80GN Hard Disk Drive Specification
Command Block Input Registers
Register
Data Low
Data High
Error
HOB=0
Sector
Count
HOB=1
HOB=0
LBA Low
HOB=1
HOB=0
LBA Mid
HOB=1
HOB=0
LBA High
HOB=1
Device
Status
0 7 6 5
BSY RDY DF DSC DRQ
0 0 V 0
181
7 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 V V V V V V
V - - - - - - -
See below ...
Status Register
4 3 2 1
COR IDX
V - 0 -
0
ERR
V