00h Byte Header ID | Western Digital T13/2132-D specs

T13/2132-D Revision 3

June 23, 2010

boot images. Another example of a section would be to identify a specific model and manufacturer of a PC. This would allow the PC to boot software specific to the system. Table 18 describes the section header.

			Table 18 — Section Header

Offset	Type		Description
00h	Byte	Header ID

		ID	Description

		90	Type is Section Header, there shall be more sections following this one

		91	Type is Section Header, this is the final section

01h	Byte	Platform ID

		ID	Description

		0	80x86

		1	Power PC

		2	Mac

02h-03h	Word	Number of section entries. This is the number of Section Entries and Section Entry
		Extensions following this header. There shall be at least one Section Entry (see
		7.2.5xxx for more information) in each section. If the Header ID is 90h then a
		Section Header shall follow the last section entry. If the Head ID is 91h then the last
		section entry shall be the last entry in the boot catalog.

04h-1Fh	Byte	ID String. This identifies the section and serves as the section name.

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

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Western Digital T13/2132-D manual 00h Byte Header ID

Contents

Information technology Enhanced Disk Drive 4 EDD-4 Revision June 23 Working Draft Enhanced Disk Drive 4 EDD-4 Points of ContactT13/2132-D Revision 3June 23 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 American National Standard for Information Technology ScopeBSR Incits ATA8-APT ATA8-AST Approved Ansi References Name Normative references GeneralApproved references References Under Development Name Project Number References under developmentOther references 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 EDD Support Function Code Locking and Ejecting Function CodeEnhanced Disk Drive EDD Support Subset 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 CD/DVD Format Boot Volume Descriptor BVDBoot Volume Descriptor 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 Annex a Hybrid MBR boot Hybrid MBR boot overviewGPT support for hybrid MBR boot code Hybrid MBR boot code Hybrid MBR boot code endeavor procedure EAX Hybrid VBR boot code