Device Configuration Identify [B1H, Sub 02H] - Hitachi DK23DA-30F - 30 GB Hard Drive Specifications

6.3.2.11.3 Device Configuration Identify [B1h, Sub 02h]

Task File Registers
Command
Cylinder High
Cylinder Low
Device/Head
Sector Number
Sector Count
Features
DRV : Device selection bit
The DEVICE CONFIGURATION IDENTIFY command returns a 512 byte data structure via PIO data-in
transfer. The content of this data structure indicates the selectable commands, modes, and feature sets that
the device is capable of supporting. If a DEVICE CONFIGURATION SET command has been issued
reducing the capabilities, the response to an IDENTIFY DEVICE command will reflect the reduced set of
capabilities, while the DEVICE CONFIGURATION IDENTIFY command will reflect the entire set of
selectable capabilities.
The format of the Device Configuration Overlay data structure is shown in Table 6.18
If the device has executed a previous DEVICE CONFIGURATION FREEZE LOCK command since power-
up, this device returns command aborted.
Word
0 Data Structure Revision
1 Multiword DMA modes supported
bit 15 - 3 0 = Reserved
bit 2
bit 1
bit 0
2 Ultra DMA modes supported
bit 15 - 6 0 = Reserved
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
K6602705
Rev.3
08.20.01
7 6
- X
0 : DRV0
Table 6.18 Device Configuration Identify Data Structure
Description
1 = Multiword DMA mode 2
1 = Multiword DMA mode 1
1 = Multiword DMA mode 0 is
1 = Ultra DMA mode 5
1 = Ultra DMA mode 4
1 = Ultra DMA mode 3
1 = Ultra DMA mode 2
1 = Ultra DMA mode 1
1 = Ultra DMA mode 0 is supported
5 4 3 2
B1h
XX
XX
- DRV
XX
XX
02h
1:DRV1
and below are supported
and below are supported
supported
and below are supported
and below are supported
and below are supported
and below are supported
and below are supported
- 89 -
1 0
XX
Value (HEX.)
0001h
0007h
003Fh