T13/2132-D Revision June 23 | Western Digital manual

T13/2132-D Revision 3

June 23, 2010

8.21 Get Extended Media Change Status (FN 49h)

This function returns media change status. If it returns with CF = 1b, the media may not have been changed. The media change notification may be activated by unlocking and locking the device door without removing the media. This function corresponds to INT 13h FN 16h, but explicitly allows any device number to be passed in. If a non-removable device supports the Device Locking and Ejecting interface subset, this function shall return with success, AH = 00h, CF = 0b. This function shall clear the media change notification on exit.

Entry

AH 49h

DL BIOS device number

Exit

Carry Clear Function completed without error

AH Shall be cleared to zero to indicate change-line inactive Carry Set Function completed with an error

AH Shall be set to 06h to indicate that change-line is active. Other values indicate other error conditions.

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

Image 70

Western Digital manual Get Extended Media Change Status FN 49h, T13/2132-D Revision June 23

Contents

Information technology Enhanced Disk Drive 4 EDD-4 Revision June 23 T13/2132-D Revision 3June 23 Points of ContactWorking 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 BSR Incits ScopeAmerican National Standard for Information Technology ATA8-APT ATA8-AST Approved references Normative references GeneralApproved Ansi References Name Other references References under developmentReferences 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 Enhanced Disk Drive EDD Support Subset Locking and Ejecting Function CodeEDD 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 Boot Volume Descriptor BVDCD/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 GPT support for hybrid MBR boot code Hybrid MBR boot Hybrid MBR boot overviewAnnex a Hybrid MBR boot code Hybrid MBR boot code endeavor procedure EAX Hybrid VBR boot code