Write Dma Ext (35H); Figure 174. Write Dma Command (Cah/Cbh) - Hitachi ic35l060avv207-0 - Deskstar 60 GB Hard Drive Specifications

11.47 Write DMA Ext (35h)

Command Block Output
Registers
Register
Data Low
Data High
Current
Fea-
ture
Previous
Current
Sector
Count
Previous
Current
Sector
Number
Previous
Cylin- Current
der
Previous
Low
Cylin- Current
der
Previous
High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
V 0 0

Figure 174. Write DMA Command (CAh/CBh)

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.
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
IDN 0 ABT T0N AMN
V 0 V 0
Deskstar 180GXP hard disk drive specifications
Command Block Input
Registers
Register
Data Low
Data High
Error
HOB=0
Sector
Count
HOB=1
HOB=0
Sector
Number
HOB=1
Cylin- HOB=0
der
HOB=1
Low
Cylin- HOB=0
der
HOB=1
High
Device/Head
Status
Status Register
0 7 6 5
BSY RDY DF
0 0 V 0
211
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
- - - - - - - -
...See Below...
4 3 2 1 0
DSC DRQ COR IDX ERR
V - 0 - V