| 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : Equates used in Enhanced INT 13h functions (EBIOS).
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| 3 | %ifndef EBIOS_INC
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| 4 | %define EBIOS_INC
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| 5 |
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| 6 | ; EBIOS specification returned by INT 13h, AH=41h
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| 7 | EBIOS_VERSION EQU 21h ; 21h = EDD version 1.1
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| 8 |
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| 9 | ; Support bits returned by INT 13h, AH=41h
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| 10 | ENHANCED_DRIVE_ACCESS_SUPPORT EQU (1<<0) ; 41h, 42h, 43h 44h, 47h and 48h are available
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| 11 | DRIVE_LOCKING_AND_EJECTING_SUPPORT EQU (1<<1) ; 41h, 45h, 46h, 48h, 49h are available and INT 15h, AH=52h
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| 12 | ENHANDED_DISK_DRIVE_SUPPORT EQU (1<<2) ; 41h, 48h, 4Eh are available (EDD)
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| 13 |
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| 14 |
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| 15 | ; Extended Drive Information returned by AH=48h
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| 16 | struc EDRIVE_INFO
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| 17 | .wSize resb 2 ; 0, Size of this buffer, at least 26
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| 18 | .wFlags resb 2 ; 2, Information flags
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| 19 | .dwCylinders resb 4 ; 4, Total number of addressable cylinders
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| 20 | .dwHeads resb 4 ; 8, Total number of addressable heads
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| 21 | .dwSectorsPerTrack resb 4 ; 12, Number of sectors per track
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| 22 | .qwTotalSectors resb 8 ; 16, Total number of addressable sectors
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| 23 | .wSectorSize resb 2 ; 24, Number of bytes per sector
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| 24 |
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| 25 | .fpEDDparams resb 8 ; 26, Optional pointer to Enhanced Disk Drive (EDD) configuration parameters
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| 26 | endstruc
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| 27 |
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| 28 | MINIMUM_EDRIVEINFO_SIZE EQU 26 ; 26 bytes does not include EDD pointer
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| 29 |
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| 30 | ; Flags for EDRIVE_INFO.wFlags
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| 31 | FLG_DMA_BOUNDARY_ERRORS_HANDLED_BY_BIOS EQU (1<<0)
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| 32 | FLG_CHS_INFORMATION_IS_VALID EQU (1<<1)
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| 33 | FLG_REMOVABLE_DRIVE EQU (1<<2)
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| 34 | FLG_WRITE_WITH_VERIFY_SUPPORTED EQU (1<<3)
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| 35 | FLG_CHANGE_LINE_SUPPORT EQU (1<<4) ; Removable media only
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| 36 | FLG_LOCKABLE EQU (1<<5) ; Removable media only
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| 37 | FLG_NO_MEDIA_PRESENT_AND_CHS_SET_TO_MAX EQU (1<<6) ; Removable media only
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| 38 |
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| 39 |
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| 40 | ; Disk Address Packet for read, write and verify functions
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| 41 | struc DAP
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| 42 | .bSize resb 1 ; 0, Size of this packet in bytes
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| 43 | .bReservedAt1 resb 1 ; 1, Currently unused, must be zero
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| 44 | .wSectorCount:
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| 45 | .bSectorCount resb 1 ; 2, Number of sectors to process (1...127)
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| 46 | .bReservedAt3 resb 1 ; 3, Currently unused, must be zero
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| 47 | .dwMemoryAddress:
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| 48 | .wOffset resb 2 ; 4, Memory offset for transfer
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| 49 | .wSegment resb 2 ; 6, Memory segment for transfer
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| 50 | .qwLBA resb 8 ; 8, Starting sector for transfer
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| 51 | endstruc
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| 52 |
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| 53 | MINIMUM_DAP_SIZE EQU 16
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| 54 |
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| 55 |
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| 56 | %endif ; EBIOS_INC
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