Western Digital T13/2132-D - Manual (Page 66)

T13/2132-D Revision 3 June 23, 2010
54 Working Draft Enhanced Disk Drive - 4 (EDD-4)
8.20.4 Device Parameter Table Extension (DPTE)
The DPTE provides hardware configuration information to applications that bypass INT 13h for addressing an
ATA device.
Table 25 — Device parameter table extension
Offset Type Description
0-1 Word I/O port base address
2-3 Word Control port address
4 Byte Device register
Bit Description
7 1
6 LBA enable (1 = enabled)
5 1
4 ATA DEV bit
3:0 0
5 Byte BIOS Vendor Specific.
6 Byte IRQ number for this device
7 Byte Block count for ATA READ/WRITE MULTIPLE commands
8 Byte DMA information
Bit Description
7:4 DMA type
3:0 DMA channel
9 Byte PIO information
Bit Description
7:4 0
3:0 PIO type