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 | ENHANCED_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 | .fpEDDparams resb 8 ; 26, Optional pointer to Enhanced Disk Drive (EDD) configuration parameters |
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25 | endstruc |
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26 | |
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27 | MINIMUM_EDRIVEINFO_SIZE EQU 26 ; 26 bytes does not include EDD pointer |
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28 | |
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29 | ; Flags for EDRIVE_INFO.wFlags |
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30 | FLG_DMA_BOUNDARY_ERRORS_HANDLED_BY_BIOS EQU (1<<0) |
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31 | FLG_CHS_INFORMATION_IS_VALID EQU (1<<1) |
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32 | FLG_REMOVABLE_DRIVE EQU (1<<2) |
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33 | FLG_WRITE_WITH_VERIFY_SUPPORTED EQU (1<<3) |
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34 | FLG_CHANGE_LINE_SUPPORT EQU (1<<4) ; Removable media only |
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35 | FLG_LOCKABLE EQU (1<<5) ; Removable media only |
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36 | FLG_NO_MEDIA_PRESENT_AND_CHS_SET_TO_MAX EQU (1<<6) ; Removable media only |
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37 | |
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38 | |
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39 | ; Disk Address Packet for read, write and verify functions |
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40 | struc DAP |
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41 | .bSize resb 1 ; 0, Size of this packet in bytes |
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42 | .bReservedAt1 resb 1 ; 1, Currently unused, must be zero |
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43 | .wSectorCount resb 2 ; 2, Number of sectors to process (0...127) |
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44 | .dwMemoryAddress: |
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45 | .wOffset resb 2 ; 4, Memory offset for transfer |
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46 | .wSegment resb 2 ; 6, Memory segment for transfer |
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47 | .qwLBA resb 8 ; 8, Starting sector for transfer |
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48 | endstruc |
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49 | |
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50 | MINIMUM_DAP_SIZE EQU 16 |
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51 | |
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52 | |
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53 | %endif ; EBIOS_INC |
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