[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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[150] | 24 | cld ; String instructions to increment pointers |
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[155] | 25 | CREATE_FRAME_INTPACK_TO_SSBP EXTRA_BYTES_FOR_INTPACK |
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[3] | 26 | |
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| 27 | call RamVars_GetSegmentToDS |
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[148] | 28 | call DriveXlate_ToOrBack |
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| 29 | mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl |
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[3] | 30 | call RamVars_IsFunctionHandledByThisBIOS |
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| 31 | jnc SHORT Int13h_DirectCallToAnotherBios |
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[148] | 32 | call FindDPT_ForDriveNumber ; DS:DI now points to DPT |
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[3] | 33 | |
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| 34 | ; Jump to correct BIOS function |
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[148] | 35 | eMOVZX bx, ah |
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| 36 | shl bx, 1 |
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[165] | 37 | cmp ah, 25h ; Possible EBIOS function? |
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[176] | 38 | %ifdef MODULE_EBIOS |
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[165] | 39 | ja SHORT .JumpToEbiosFunction |
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[176] | 40 | %else |
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| 41 | ja SHORT Int13h_UnsupportedFunction |
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| 42 | %endif |
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[148] | 43 | jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function |
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[3] | 44 | |
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[176] | 45 | %ifdef MODULE_EBIOS |
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[165] | 46 | ; Jump to correct EBIOS function |
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| 47 | ALIGN JUMP_ALIGN |
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| 48 | .JumpToEbiosFunction: |
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[167] | 49 | test BYTE [cs:ROMVARS.wFlags], FLG_ROMVARS_FULLMODE |
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| 50 | jz SHORT Int13h_UnsupportedFunction ; No eINT 13h in lite mode |
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| 51 | test BYTE [di+DPT.bFlagsLow], FLG_DRVNHEAD_LBA |
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| 52 | jz SHORT Int13h_UnsupportedFunction ; No eINT 13h for CHS drives |
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| 53 | cmp ah, 48h |
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[165] | 54 | ja SHORT Int13h_UnsupportedFunction |
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[181] | 55 | sub bl, 41h<<1 ; BX = Offset to eINT 13h jump table |
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| 56 | jb SHORT Int13h_UnsupportedFunction |
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[165] | 57 | jmp [cs:bx+g_rgwEbiosFunctionJumpTable] |
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[176] | 58 | %endif |
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[3] | 59 | |
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| 60 | ;-------------------------------------------------------------------- |
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[148] | 61 | ; Int13h_UnsupportedFunction |
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[3] | 62 | ; Int13h_DirectCallToAnotherBios |
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| 63 | ; Parameters: |
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[148] | 64 | ; DL: Translated drive number |
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[3] | 65 | ; DS: RAMVARS segment |
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[150] | 66 | ; SS:BP: Ptr to IDEPACK |
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[148] | 67 | ; BX, DI: Corrupted on Int13h_DiskFunctionsHandler |
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[161] | 68 | ; Other: Function specific INT 13h parameters |
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[3] | 69 | ; Returns: |
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| 70 | ; Depends on function |
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| 71 | ; Corrupts registers: |
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| 72 | ; Flags |
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| 73 | ;-------------------------------------------------------------------- |
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| 74 | ALIGN JUMP_ALIGN |
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| 75 | Int13h_UnsupportedFunction: |
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| 76 | Int13h_DirectCallToAnotherBios: |
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[148] | 77 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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[150] | 78 | mov bx, [bp+IDEPACK.intpack+INTPACK.bx] |
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| 79 | mov di, [bp+IDEPACK.intpack+INTPACK.di] |
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| 80 | mov ds, [bp+IDEPACK.intpack+INTPACK.ds] |
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| 81 | push WORD [bp+IDEPACK.intpack+INTPACK.flags] |
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[148] | 82 | popf |
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| 83 | push bp |
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[150] | 84 | mov bp, [bp+IDEPACK.intpack+INTPACK.bp] |
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[148] | 85 | int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants |
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[3] | 86 | |
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[148] | 87 | ; Store returned values to INTPACK |
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| 88 | pop bp ; Standard INT 13h functions never uses BP as return register |
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| 89 | %ifdef USE_386 |
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[150] | 90 | mov [bp+IDEPACK.intpack+INTPACK.gs], gs |
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| 91 | mov [bp+IDEPACK.intpack+INTPACK.fs], fs |
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[148] | 92 | %endif |
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[150] | 93 | mov [bp+IDEPACK.intpack+INTPACK.es], es |
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| 94 | mov [bp+IDEPACK.intpack+INTPACK.ds], ds |
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| 95 | mov [bp+IDEPACK.intpack+INTPACK.di], di |
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| 96 | mov [bp+IDEPACK.intpack+INTPACK.si], si |
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| 97 | mov [bp+IDEPACK.intpack+INTPACK.bx], bx |
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| 98 | mov [bp+IDEPACK.intpack+INTPACK.dh], dh |
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| 99 | mov [bp+IDEPACK.intpack+INTPACK.cx], cx |
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| 100 | mov [bp+IDEPACK.intpack+INTPACK.ax], ax |
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[148] | 101 | pushf |
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[150] | 102 | pop WORD [bp+IDEPACK.intpack+INTPACK.flags] |
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[148] | 103 | call RamVars_GetSegmentToDS |
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| 104 | cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv] |
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| 105 | je SHORT .ExchangeInt13hHandlers |
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[150] | 106 | mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL |
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[148] | 107 | ALIGN JUMP_ALIGN |
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| 108 | .ExchangeInt13hHandlers: |
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| 109 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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| 110 | ; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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[3] | 111 | |
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| 112 | |
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| 113 | ;-------------------------------------------------------------------- |
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[148] | 114 | ; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 115 | ; Int13h_ReturnFromHandlerWithoutStoringErrorCode |
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[32] | 116 | ; Parameters: |
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[148] | 117 | ; AH: BIOS Error code |
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[150] | 118 | ; SS:BP: Ptr to IDEPACK |
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[32] | 119 | ; Returns: |
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[148] | 120 | ; All registers are loaded from INTPACK |
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[32] | 121 | ;-------------------------------------------------------------------- |
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| 122 | ALIGN JUMP_ALIGN |
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[148] | 123 | Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH: |
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[150] | 124 | call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH |
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[148] | 125 | Int13h_ReturnFromHandlerWithoutStoringErrorCode: |
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[150] | 126 | or WORD [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_IF ; Return with interrupts enabled |
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[148] | 127 | mov sp, bp ; Now we can exit anytime |
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[155] | 128 | RESTORE_FRAME_INTPACK_FROM_SSBP EXTRA_BYTES_FOR_INTPACK |
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[32] | 129 | |
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| 130 | |
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| 131 | ;-------------------------------------------------------------------- |
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[148] | 132 | ; Int13h_CallPreviousInt13hHandler |
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[3] | 133 | ; Parameters: |
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[148] | 134 | ; AH: INT 13h function to call |
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| 135 | ; DL: Drive number |
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| 136 | ; DS: RAMVARS segment |
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[3] | 137 | ; Returns: |
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| 138 | ; Depends on function |
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| 139 | ; Corrupts registers: |
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[148] | 140 | ; BX, DI, ES |
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[3] | 141 | ;-------------------------------------------------------------------- |
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| 142 | ALIGN JUMP_ALIGN |
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[148] | 143 | Int13h_CallPreviousInt13hHandler: |
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[3] | 144 | push di |
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[148] | 145 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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| 146 | int BIOS_DISK_INTERRUPT_13h |
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| 147 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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| 148 | pop di |
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| 149 | ret |
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[35] | 150 | |
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[3] | 151 | |
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| 152 | ;-------------------------------------------------------------------- |
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[148] | 153 | ; ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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[3] | 154 | ; Parameters: |
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| 155 | ; DS: RAMVARS segment |
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| 156 | ; Returns: |
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[148] | 157 | ; Nothing |
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[3] | 158 | ; Corrupts registers: |
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[148] | 159 | ; DI |
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[3] | 160 | ;-------------------------------------------------------------------- |
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| 161 | ALIGN JUMP_ALIGN |
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[148] | 162 | ExchangeCurrentInt13hHandlerWithOldInt13hHandler: |
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| 163 | push es |
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| 164 | LOAD_BDA_SEGMENT_TO es, di |
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| 165 | mov di, [RAMVARS.fpOldI13h] |
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[150] | 166 | cli |
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[148] | 167 | xchg di, [es:BIOS_DISK_INTERRUPT_13h*4] |
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| 168 | mov [RAMVARS.fpOldI13h], di |
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| 169 | mov di, [RAMVARS.fpOldI13h+2] |
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| 170 | xchg di, [es:BIOS_DISK_INTERRUPT_13h*4+2] |
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[181] | 171 | sti |
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[148] | 172 | mov [RAMVARS.fpOldI13h+2], di |
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| 173 | pop es |
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| 174 | ret |
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[28] | 175 | |
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[35] | 176 | |
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[150] | 177 | ;-------------------------------------------------------------------- |
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| 178 | ; Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH |
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| 179 | ; Int13h_SetErrorCodeToIntpackInSSBPfromAH |
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| 180 | ; Parameters: |
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| 181 | ; AH: BIOS error code (00h = no error) |
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| 182 | ; SS:BP: Ptr to IDEPACK |
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| 183 | ; Returns: |
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| 184 | ; SS:BP: Ptr to IDEPACK with error condition set |
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| 185 | ; Corrupts registers: |
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| 186 | ; DS, DI |
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| 187 | ;-------------------------------------------------------------------- |
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| 188 | ALIGN JUMP_ALIGN |
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| 189 | Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH: |
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| 190 | ; Store error code to BDA |
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| 191 | LOAD_BDA_SEGMENT_TO ds, di |
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| 192 | mov [BDA.bHDLastSt], ah |
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[35] | 193 | |
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[150] | 194 | ; Store error code to INTPACK |
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| 195 | Int13h_SetErrorCodeToIntpackInSSBPfromAH: |
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| 196 | mov [bp+IDEPACK.intpack+INTPACK.ah], ah |
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| 197 | test ah, ah |
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| 198 | jnz SHORT .SetCFtoIntpack |
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| 199 | and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF |
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| 200 | ret |
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| 201 | .SetCFtoIntpack: |
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| 202 | or BYTE [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_CF |
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| 203 | ret |
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| 204 | |
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| 205 | |
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[3] | 206 | ; Jump table for correct BIOS function |
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| 207 | ALIGN WORD_ALIGN |
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| 208 | g_rgw13hFuncJump: |
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| 209 | dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All) |
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| 210 | dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All) |
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| 211 | dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All) |
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| 212 | dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All) |
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| 213 | dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All) |
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[90] | 214 | dw Int13h_UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA) |
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[3] | 215 | dw Int13h_UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT) |
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| 216 | dw Int13h_UnsupportedFunction ; 07h, Format Multiple Cylinders (XT) |
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| 217 | dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All) |
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| 218 | dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All) |
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| 219 | dw Int13h_UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA) |
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| 220 | dw Int13h_UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA) |
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| 221 | dw AHCh_HandlerForSeek ; 0Ch, Seek (All) |
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| 222 | dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All) |
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| 223 | dw Int13h_UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2) |
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| 224 | dw Int13h_UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2) |
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| 225 | dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All) |
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| 226 | dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All) |
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| 227 | dw Int13h_UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT) |
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| 228 | dw Int13h_UnsupportedFunction ; 13h, Drive Diagnostic (XT) |
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[90] | 229 | dw Int13h_UnsupportedFunction ; 14h, Controller Internal Diagnostic (All) |
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[3] | 230 | dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+) |
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[161] | 231 | dw Int13h_UnsupportedFunction ; 16h, |
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| 232 | dw Int13h_UnsupportedFunction ; 17h, |
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| 233 | dw Int13h_UnsupportedFunction ; 18h, |
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[3] | 234 | dw Int13h_UnsupportedFunction ; 19h, Park Heads (PS/2) |
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| 235 | dw Int13h_UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2) |
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| 236 | dw Int13h_UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2) |
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| 237 | dw Int13h_UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2) |
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[161] | 238 | dw Int13h_UnsupportedFunction ; 1Dh, |
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| 239 | dw Int13h_UnsupportedFunction ; 1Eh, |
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| 240 | dw Int13h_UnsupportedFunction ; 1Fh, |
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| 241 | dw Int13h_UnsupportedFunction ; 20h, |
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[3] | 242 | dw Int13h_UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1) |
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| 243 | dw Int13h_UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1) |
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| 244 | dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1) |
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| 245 | dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1) |
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| 246 | dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1) |
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[165] | 247 | |
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[176] | 248 | %ifdef MODULE_EBIOS |
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[165] | 249 | g_rgwEbiosFunctionJumpTable: |
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| 250 | dw AH41h_HandlerForCheckIfExtensionsPresent ; 41h, Check if Extensions Present (EBIOS)* |
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| 251 | dw AH42h_HandlerForExtendedReadSectors ; 42h, Extended Read Sectors (EBIOS)* |
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| 252 | dw AH43h_HandlerForExtendedWriteSectors ; 43h, Extended Write Sectors (EBIOS)* |
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| 253 | dw AH44h_HandlerForExtendedVerifySectors ; 44h, Extended Verify Sectors (EBIOS)* |
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| 254 | dw Int13h_UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)*** |
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| 255 | dw Int13h_UnsupportedFunction ; 46h, Eject Media Request (EBIOS)*** |
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| 256 | dw AH47h_HandlerForExtendedSeek ; 47h, Extended Seek (EBIOS)* |
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| 257 | dw AH48h_HandlerForGetExtendedDriveParameters ; 48h, Get Extended Drive Parameters (EBIOS)* |
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[150] | 258 | ; dw Int13h_UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)*** |
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[3] | 259 | ; dw Int13h_UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM) |
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| 260 | ; dw Int13h_UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM) |
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| 261 | ; dw Int13h_UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM) |
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| 262 | ; dw Int13h_UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM) |
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[150] | 263 | ; dw Int13h_UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)** |
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| 264 | ; |
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| 265 | ; * = Enhanced Drive Access Support (minimum required EBIOS functions) |
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| 266 | ; ** = Enhanced Disk Drive (EDD) Support |
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| 267 | ; *** = Drive Locking and Ejecting Support |
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[181] | 268 | %endif |
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