| 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : Int 13h BIOS functions (Floppy and Hard disk).
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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 software interrupt handler.
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| 9 | ; Jumps to specific function defined in AH.
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| 10 | ;
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| 11 | ; Note to developers: Do not make recursive INT 13h calls!
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| 12 | ;
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| 13 | ; Int13h_DiskFunctionsHandler
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| 14 | ; Parameters:
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| 15 | ; AH: Bios function
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| 16 | ; DL: Drive number
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| 17 | ; Other: Depends on function
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| 18 | ; Returns:
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| 19 | ; Depends on function
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| 20 | ;--------------------------------------------------------------------
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| 21 | ALIGN JUMP_ALIGN
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| 22 | Int13h_DiskFunctionsHandler:
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| 23 | sti ; Enable interrupts
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| 24 | SAVE_AND_GET_INTPACK_TO_SSBP
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| 25 |
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| 26 | call RamVars_GetSegmentToDS
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| 27 | call DriveXlate_ToOrBack
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| 28 | mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
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| 29 | call RamVars_IsFunctionHandledByThisBIOS
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| 30 | jnc SHORT Int13h_DirectCallToAnotherBios
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| 31 | call FindDPT_ForDriveNumber ; DS:DI now points to DPT
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| 32 |
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| 33 | ; Jump to correct BIOS function
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| 34 | JumpToBiosFunctionInAH:
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| 35 | cmp ah, 25h ; Valid BIOS function?
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| 36 | ja SHORT Int13h_UnsupportedFunction
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| 37 | eMOVZX bx, ah
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| 38 | shl bx, 1
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| 39 | jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function
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| 40 |
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| 41 |
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| 42 | ;--------------------------------------------------------------------
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| 43 | ; Int13h_UnsupportedFunction
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| 44 | ; Int13h_DirectCallToAnotherBios
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| 45 | ; Parameters:
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| 46 | ; DL: Translated drive number
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| 47 | ; DS: RAMVARS segment
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| 48 | ; SS:BP: Ptr to INTPACK
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| 49 | ; BX, DI: Corrupted on Int13h_DiskFunctionsHandler
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| 50 | ; Other: Function specific INT 13h parameters
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| 51 | ; Returns:
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| 52 | ; Depends on function
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| 53 | ; Corrupts registers:
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| 54 | ; Flags
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| 55 | ;--------------------------------------------------------------------
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| 56 | ALIGN JUMP_ALIGN
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| 57 | Int13h_UnsupportedFunction:
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| 58 | Int13h_DirectCallToAnotherBios:
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| 59 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
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| 60 | mov bx, [bp+INTPACK.bx]
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| 61 | mov di, [bp+INTPACK.di]
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| 62 | mov ds, [bp+INTPACK.ds]
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| 63 | push WORD [bp+INTPACK.flags]
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| 64 | popf
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| 65 | push bp
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| 66 | mov bp, [bp+INTPACK.bp]
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| 67 | int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants
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| 68 |
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| 69 | ; Store returned values to INTPACK
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| 70 | pop bp ; Standard INT 13h functions never uses BP as return register
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| 71 | %ifdef USE_386
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| 72 | mov [bp+INTPACK.gs], gs
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| 73 | mov [bp+INTPACK.fs], fs
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| 74 | %endif
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| 75 | mov [bp+INTPACK.es], es
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| 76 | mov [bp+INTPACK.ds], ds
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| 77 | mov [bp+INTPACK.di], di
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| 78 | mov [bp+INTPACK.si], si
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| 79 | mov [bp+INTPACK.bx], bx
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| 80 | mov [bp+INTPACK.dh], dh
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| 81 | mov [bp+INTPACK.cx], cx
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| 82 | mov [bp+INTPACK.ax], ax
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| 83 | pushf
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| 84 | pop WORD [bp+INTPACK.flags]
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| 85 | call RamVars_GetSegmentToDS
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| 86 | cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv]
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| 87 | je SHORT .ExchangeInt13hHandlers
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| 88 | mov [bp+INTPACK.dl], dl ; Something is returned in DL
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| 89 | ALIGN JUMP_ALIGN
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| 90 | .ExchangeInt13hHandlers:
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| 91 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
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| 92 | ; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 93 |
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| 94 |
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| 95 | ;--------------------------------------------------------------------
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| 96 | ; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 97 | ; Int13h_ReturnFromHandlerWithoutStoringErrorCode
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| 98 | ; Parameters:
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| 99 | ; AH: BIOS Error code
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| 100 | ; SS:BP: Ptr to INTPACK
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| 101 | ; Returns:
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| 102 | ; All registers are loaded from INTPACK
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| 103 | ;--------------------------------------------------------------------
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| 104 | ALIGN JUMP_ALIGN
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| 105 | Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH:
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| 106 | call HError_SetErrorCodeToBdaAndToIntpackInSSBPfromAH
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| 107 | Int13h_ReturnFromHandlerWithoutStoringErrorCode:
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| 108 | or WORD [bp+INTPACK.flags], FLG_FLAGS_IF ; Return with interrupts enabled
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| 109 | mov sp, bp ; Now we can exit anytime
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| 110 | RESTORE_INTPACK_FROM_SSBP
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| 111 |
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| 112 |
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| 113 | ;--------------------------------------------------------------------
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| 114 | ; Int13h_CallPreviousInt13hHandler
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| 115 | ; Parameters:
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| 116 | ; AH: INT 13h function to call
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| 117 | ; DL: Drive number
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| 118 | ; DS: RAMVARS segment
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| 119 | ; Returns:
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| 120 | ; Depends on function
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| 121 | ; Corrupts registers:
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| 122 | ; BX, DI, ES
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| 123 | ;--------------------------------------------------------------------
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| 124 | ALIGN JUMP_ALIGN
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| 125 | Int13h_CallPreviousInt13hHandler:
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| 126 | push di
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| 127 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
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| 128 | int BIOS_DISK_INTERRUPT_13h
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| 129 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler
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| 130 | pop di
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| 131 | ret
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| 132 |
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| 133 |
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| 134 | ;--------------------------------------------------------------------
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| 135 | ; ExchangeCurrentInt13hHandlerWithOldInt13hHandler
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| 136 | ; Parameters:
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| 137 | ; DS: RAMVARS segment
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| 138 | ; Returns:
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| 139 | ; Nothing
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| 140 | ; Corrupts registers:
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| 141 | ; DI
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| 142 | ;--------------------------------------------------------------------
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| 143 | ALIGN JUMP_ALIGN
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| 144 | ExchangeCurrentInt13hHandlerWithOldInt13hHandler:
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| 145 | push es
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| 146 | LOAD_BDA_SEGMENT_TO es, di
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| 147 | mov di, [RAMVARS.fpOldI13h]
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| 148 | xchg di, [es:BIOS_DISK_INTERRUPT_13h*4]
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| 149 | mov [RAMVARS.fpOldI13h], di
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| 150 | mov di, [RAMVARS.fpOldI13h+2]
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| 151 | xchg di, [es:BIOS_DISK_INTERRUPT_13h*4+2]
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| 152 | mov [RAMVARS.fpOldI13h+2], di
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| 153 | pop es
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| 154 | ret
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| 155 |
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| 156 |
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| 157 |
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| 158 | ; Jump table for correct BIOS function
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| 159 | ALIGN WORD_ALIGN
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| 160 | g_rgw13hFuncJump:
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| 161 | dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All)
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| 162 | dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All)
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| 163 | dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All)
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| 164 | dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All)
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| 165 | dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All)
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| 166 | dw Int13h_UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA)
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| 167 | dw Int13h_UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT)
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| 168 | dw Int13h_UnsupportedFunction ; 07h, Format Multiple Cylinders (XT)
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| 169 | dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All)
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| 170 | dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All)
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| 171 | dw Int13h_UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA)
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| 172 | dw Int13h_UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA)
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| 173 | dw AHCh_HandlerForSeek ; 0Ch, Seek (All)
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| 174 | dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All)
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| 175 | dw Int13h_UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
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| 176 | dw Int13h_UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2)
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| 177 | dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All)
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| 178 | dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All)
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| 179 | dw Int13h_UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT)
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| 180 | dw Int13h_UnsupportedFunction ; 13h, Drive Diagnostic (XT)
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| 181 | dw Int13h_UnsupportedFunction ; 14h, Controller Internal Diagnostic (All)
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| 182 | dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+)
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| 183 | dw Int13h_UnsupportedFunction ; 16h,
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| 184 | dw Int13h_UnsupportedFunction ; 17h,
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| 185 | dw Int13h_UnsupportedFunction ; 18h,
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| 186 | dw Int13h_UnsupportedFunction ; 19h, Park Heads (PS/2)
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| 187 | dw Int13h_UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2)
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| 188 | dw Int13h_UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2)
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| 189 | dw Int13h_UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2)
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| 190 | dw Int13h_UnsupportedFunction ; 1Dh,
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| 191 | dw Int13h_UnsupportedFunction ; 1Eh,
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| 192 | dw Int13h_UnsupportedFunction ; 1Fh,
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| 193 | dw Int13h_UnsupportedFunction ; 20h,
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| 194 | dw Int13h_UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1)
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| 195 | dw Int13h_UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1)
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| 196 | dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1)
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| 197 | dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1)
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| 198 | dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1)
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| 199 | ; dw Int13h_UnsupportedFunction ; 26h,
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| 200 | ; dw Int13h_UnsupportedFunction ; 27h,
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| 201 | ; dw Int13h_UnsupportedFunction ; 28h,
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| 202 | ; dw Int13h_UnsupportedFunction ; 29h,
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| 203 | ; dw Int13h_UnsupportedFunction ; 2Ah,
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| 204 | ; dw Int13h_UnsupportedFunction ; 2Bh,
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| 205 | ; dw Int13h_UnsupportedFunction ; 2Ch,
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| 206 | ; dw Int13h_UnsupportedFunction ; 2Dh,
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| 207 | ; dw Int13h_UnsupportedFunction ; 2Eh,
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| 208 | ; dw Int13h_UnsupportedFunction ; 2Fh,
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| 209 | ; dw Int13h_UnsupportedFunction ; 30h,
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| 210 | ; dw Int13h_UnsupportedFunction ; 31h,
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| 211 | ; dw Int13h_UnsupportedFunction ; 32h,
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| 212 | ; dw Int13h_UnsupportedFunction ; 33h,
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| 213 | ; dw Int13h_UnsupportedFunction ; 34h,
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| 214 | ; dw Int13h_UnsupportedFunction ; 35h,
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| 215 | ; dw Int13h_UnsupportedFunction ; 36h,
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| 216 | ; dw Int13h_UnsupportedFunction ; 37h,
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| 217 | ; dw Int13h_UnsupportedFunction ; 38h,
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| 218 | ; dw Int13h_UnsupportedFunction ; 39h,
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| 219 | ; dw Int13h_UnsupportedFunction ; 3Ah,
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| 220 | ; dw Int13h_UnsupportedFunction ; 3Bh,
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| 221 | ; dw Int13h_UnsupportedFunction ; 3Ch,
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| 222 | ; dw Int13h_UnsupportedFunction ; 3Dh,
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| 223 | ; dw Int13h_UnsupportedFunction ; 3Eh,
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| 224 | ; dw Int13h_UnsupportedFunction ; 3Fh,
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| 225 | ; dw Int13h_UnsupportedFunction ; 40h,
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| 226 | ; dw Int13h_UnsupportedFunction ; 41h, Check if Extensions Present (EBIOS)
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| 227 | ; dw Int13h_UnsupportedFunction ; 42h, Extended Read Sectors (EBIOS)
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| 228 | ; dw Int13h_UnsupportedFunction ; 43h, Extended Write Sectors (EBIOS)
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| 229 | ; dw Int13h_UnsupportedFunction ; 44h, Extended Verify Sectors (EBIOS)
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| 230 | ; dw Int13h_UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)
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| 231 | ; dw Int13h_UnsupportedFunction ; 46h, Eject Media Request (EBIOS)
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| 232 | ; dw Int13h_UnsupportedFunction ; 47h, Extended Seek (EBIOS)
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| 233 | ; dw Int13h_UnsupportedFunction ; 48h, Get Extended Drive Parameters (EBIOS)
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| 234 | ; dw Int13h_UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)
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| 235 | ; dw Int13h_UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM)
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| 236 | ; dw Int13h_UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM)
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| 237 | ; dw Int13h_UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM)
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| 238 | ; dw Int13h_UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM)
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| 239 | ; dw Int13h_UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)
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