[90] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 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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[148] | 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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[3] | 14 | ; Parameters: |
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| 15 | ; AH: Bios function |
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| 16 | ; DL: Drive number |
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[148] | 17 | ; Other: Depends on function |
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[3] | 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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[148] | 22 | Int13h_DiskFunctionsHandler: |
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[3] | 23 | sti ; Enable interrupts |
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[148] | 24 | SAVE_AND_GET_INTPACK_TO_SSBP |
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[3] | 25 | |
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| 26 | call RamVars_GetSegmentToDS |
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[148] | 27 | call DriveXlate_ToOrBack |
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| 28 | mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl |
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[3] | 29 | call RamVars_IsFunctionHandledByThisBIOS |
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| 30 | jnc SHORT Int13h_DirectCallToAnotherBios |
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[148] | 31 | call FindDPT_ForDriveNumber ; DS:DI now points to DPT |
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[3] | 32 | |
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| 33 | ; Jump to correct BIOS function |
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[148] | 34 | JumpToBiosFunctionInAH: |
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[3] | 35 | cmp ah, 25h ; Valid BIOS function? |
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| 36 | ja SHORT Int13h_UnsupportedFunction |
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[148] | 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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[3] | 40 | |
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| 41 | |
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| 42 | ;-------------------------------------------------------------------- |
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[148] | 43 | ; Int13h_UnsupportedFunction |
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[3] | 44 | ; Int13h_DirectCallToAnotherBios |
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| 45 | ; Parameters: |
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[148] | 46 | ; DL: Translated drive number |
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[3] | 47 | ; DS: RAMVARS segment |
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[148] | 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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[3] | 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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[148] | 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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[3] | 68 | |
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[148] | 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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[3] | 93 | |
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| 94 | |
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| 95 | ;-------------------------------------------------------------------- |
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[148] | 96 | ; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 97 | ; Int13h_ReturnFromHandlerWithoutStoringErrorCode |
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[32] | 98 | ; Parameters: |
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[148] | 99 | ; AH: BIOS Error code |
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| 100 | ; SS:BP: Ptr to INTPACK |
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[32] | 101 | ; Returns: |
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[148] | 102 | ; All registers are loaded from INTPACK |
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[32] | 103 | ;-------------------------------------------------------------------- |
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| 104 | ALIGN JUMP_ALIGN |
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[148] | 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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[32] | 111 | |
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| 112 | |
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| 113 | ;-------------------------------------------------------------------- |
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[148] | 114 | ; Int13h_CallPreviousInt13hHandler |
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[3] | 115 | ; Parameters: |
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[148] | 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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[3] | 119 | ; Returns: |
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| 120 | ; Depends on function |
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| 121 | ; Corrupts registers: |
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[148] | 122 | ; BX, DI, ES |
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[3] | 123 | ;-------------------------------------------------------------------- |
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| 124 | ALIGN JUMP_ALIGN |
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[148] | 125 | Int13h_CallPreviousInt13hHandler: |
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[3] | 126 | push di |
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[148] | 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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[35] | 132 | |
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[3] | 133 | |
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| 134 | ;-------------------------------------------------------------------- |
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[148] | 135 | ; ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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[3] | 136 | ; Parameters: |
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| 137 | ; DS: RAMVARS segment |
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| 138 | ; Returns: |
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[148] | 139 | ; Nothing |
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[3] | 140 | ; Corrupts registers: |
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[148] | 141 | ; DI |
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[3] | 142 | ;-------------------------------------------------------------------- |
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| 143 | ALIGN JUMP_ALIGN |
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[148] | 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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[28] | 155 | |
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[35] | 156 | |
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| 157 | |
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[3] | 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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[90] | 166 | dw Int13h_UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA) |
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[3] | 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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[90] | 181 | dw Int13h_UnsupportedFunction ; 14h, Controller Internal Diagnostic (All) |
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[3] | 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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