Device parameter table extension | Western Digital T13/2132-D

T13/2132-D Revision 3

June 23, 2010

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

54	Working Draft Enhanced Disk Drive - 4 (EDD-4)

Image 66

Western Digital T13/2132-D manual Device parameter table extension, Offset Type Description

Contents

Information technology Enhanced Disk Drive 4 EDD-4 Revision June 23 Points of Contact T13/2132-D Revision 3June 23Working Draft Enhanced Disk Drive 4 EDD-4 Draft June 23 T13/2132-D Revision American National Standard T13/2132-D Revision June 23 Document Status New Capabilities added to EDD-4 Contents Working Draft Enhanced Disk Drive 4 EDD-4 Vii Viii Working Draft Enhanced Disk Drive 4 EDD-4 Tables Output Parameters Figures Foreword Introduction Xii Working Draft Enhanced Disk Drive 4 EDD-4 Scope BSR IncitsAmerican National Standard for Information Technology ATA8-APT ATA8-AST Normative references General Approved referencesApproved Ansi References Name References under development Other referencesReferences Under Development Name Project Number June 23 T13/2132-D Revision Conventions Symbols and abbreviationsMaster Boot Record MBR The first LBA on a disk Abbreviation Meaning Unordered lists PrecedenceLists Lists overview Ordered lists T13/2132-D Revision June 23 Keywords Numbering Numbering conventions French English This standard Register and CF ContentsInterrupt Services and Functions Bit conventions DWord at word offset n ByteWord at offset n QWord at word offset n Word ATA string byte swapping Word Byte Character in stringATA firmware revision example Byte Value Overview Register Description 8GB INT 13h Functions Conventional FunctionsConventional Register Definitions Bit Description Conventional Function Definitions Function a Description Extended Function Definitions 8GB INT 13h Functions OverviewData Structure Function Description T13/2132-D Revision June 23 Device Address Packet Offset Removable Media Fixed Disk Access SubsetFixed Disk Access Function Code INT 13h Interface Subsets Locking and Ejecting Function Code Enhanced Disk Drive EDD Support SubsetEDD Support Function Code CD/DVD Boot Overview ISO 9660 CD Layout Working Draft Enhanced Disk Drive 4 EDD-4 System Area Unused Boot Methods Emulation Process Hard Drive Boot No Emulation BootFloppy Boot Floppy Geometries Type Cylinders Heads Sectors Boot Volume Descriptor BVD Boot Volume DescriptorCD/DVD Format T13/2132-D Revision June 23 Validation Entry Offset Type Description June 23 T13/2132-D Revision Initial/Default Entry Section Header 00h Byte Header ID June 23 T13/2132-D Revision Section Entry Type Description T13/2132-D Revision June 23 Section Entry Extension INT 13h Function Definitions Overview Reset Disk Subsystem FN 00h Get Status of Last Operation FN 01h Read Sectors into Memory FN 02h Write Sectors From Memory FN 03h Verify Sectors FN 04h Get Drive Parameters FN 08h Read Buffer FN 0Eh Write Buffer FN 0Fh Get Disk Type FN 15h Value Description Set Media Type FN 18h Park Heads FN 19h Identify Device Information FN 25h Check Extensions Present FN 41h Interface Support Bit Map Description Extended Read FN 42h Extended Write FN 43h Verify Sectors FN 44h Lock/Unlock Media FN 45h Eject Removable Media FN 46h Get Device Parameters FN 48h Result Buffer Ascii T13/2132-D Revision June 23 Interface Path Interface Path Definitions part 1 Host Bus Type Offset Definition Device Path 00h ATA Device 01h 02h..FFh Reserved Byte Word DWord QWord Byte Port number Device parameter table extension Offset 0-1 I/O port base Offset 5 Bios use only Bios use only Offset 6 IRQ numberOffset 7 READ/WRITE Multiple command block count Offset 2-3 control port base Bit 8 Atapi device uses command packet interrupt Offset 10-11 Bios selected hardware specific option flagsBit 7 32-bit transfer mode Offset 9 PIO type Translation Type Bits Description Bit 13h 48-bit LBA addressing enabledJune 23 T13/2132-D Revision Bits 9-10 translation type Bit 11 Ultra DMA Get Extended Media Change Status FN 49h Initiate Disk Emulation FN 4Ah Value Emulation Working Draft Enhanced Disk Drive 4 EDD-4 Terminate Disk Emulation FN 4Bh Initiate Disk Emulation & Boot FN 4Ch Return Boot Catalog FN 4Dh CD Command Packet Set Hardware Configuration FN 4Eh Hardware Configuration Sub-Functions Send Packet Command FN 50h Formatted Command Packet Offset Type Description Formatted Protocol Specific Data T13/2132-D Revision June 23 Output Parameters Security Protocol Commands FN 51h INT 15h Removable Media Eject Hybrid MBR boot Hybrid MBR boot overview GPT support for hybrid MBR boot codeAnnex a Hybrid MBR boot code Hybrid MBR boot code endeavor procedure EAX Hybrid VBR boot code