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Last change
on this file since 154 was 150, checked in by Tomi Tilli, 13 years ago |
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Changes to XTIDE Universal BIOS:
- Redesigned Disk Parameter Tables.
- Code generalizations for supporting non-IDE devices in the future.
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File size:
1.0 KB
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| Rev | Line | |
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| [88] | 1 | ; Project name : XTIDE Universal BIOS
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| [3] | 2 | ; Description : Int 13h function AH=25h, Get Drive Information.
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| 3 |
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| 4 | ; Section containing code
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| 5 | SECTION .text
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| 6 |
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| 7 | ;--------------------------------------------------------------------
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| 8 | ; Int 13h function AH=25h, Get Drive Information.
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| 9 | ;
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| 10 | ; AH25h_HandlerForGetDriveInformation
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| 11 | ; Parameters:
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| [148] | 12 | ; ES: Same as in INTPACK
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| 13 | ; DL: Translated Drive number
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| 14 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| [150] | 15 | ; SS:BP: Ptr to IDEPACK
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| 16 | ; Parameters on INTPACK:
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| [3] | 17 | ; ES:BX: Ptr to buffer to receive 512-byte drive information
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| [150] | 18 | ; Returns with INTPACK:
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| [3] | 19 | ; AH: Int 13h return status
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| 20 | ; CF: 0 if succesfull, 1 if error
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| 21 | ;--------------------------------------------------------------------
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| 22 | ALIGN JUMP_ALIGN
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| 23 | AH25h_HandlerForGetDriveInformation:
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| [150] | 24 | push bp
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| [3] | 25 |
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| [150] | 26 | mov si, [bp+IDEPACK.intpack+INTPACK.bx]
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| 27 | call AccessDPT_GetDriveSelectByteToAL
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| 28 | mov bh, al
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| 29 | eMOVZX ax, BYTE [di+DPT.bIdevarsOffset]
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| 30 | xchg bp, ax
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| 31 | call Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
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| 32 |
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| 33 | pop bp
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| [148] | 34 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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