Read Dma Ext [25H] - Hitachi C4K60 - Travelstar Slim - Hard Drive Specifications

7.5.16. Read DMA EXT [25h]

Task File Register
Command
Feature
LBA High
LBA Mid
LBA Low
Sector Count
Device
This command executes in a similar manner to the READ SECTORS EXT command except for the
following:
- 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 indicating that data transfer has terminated and
status is valid.
If an error occurs, the read terminates at the sector where the error occurred. The Command Block
Registers contain 48-bit LBA address where the error occurred.
K6610170
Rev.2
Dec 22, 2004
Previous setting
Current setting
Previous setting
Current setting
Previous setting
Current setting
Previous setting
Current setting
Previous setting
Current setting
7 6 5
LBA bit 47 - 40
LBA bit 23 - 16
LBA bit 39 - 32
LBA bit 15 - 8
LBA bit 31 - 24
LBA bit 7 - 0
Sector Count bit 15 - 8
Sector Count bit 7 - 0
X 1 X
- 76 -
4 3 2
25h
XX
XX
DEV X X
1 0
X X