[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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[376] | 4 | ; |
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| 5 | ; XTIDE Universal BIOS and Associated Tools |
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team. |
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| 7 | ; |
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| 8 | ; This program is free software; you can redistribute it and/or modify |
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| 9 | ; it under the terms of the GNU General Public License as published by |
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| 10 | ; the Free Software Foundation; either version 2 of the License, or |
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| 11 | ; (at your option) any later version. |
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| 12 | ; |
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| 13 | ; This program is distributed in the hope that it will be useful, |
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | ; GNU General Public License for more details. |
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| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 18 | ; |
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| 19 | |
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[3] | 20 | ; Section containing code |
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| 21 | SECTION .text |
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| 22 | |
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| 23 | ;-------------------------------------------------------------------- |
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| 24 | ; Int 13h software interrupt handler. |
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| 25 | ; Jumps to specific function defined in AH. |
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| 26 | ; |
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[148] | 27 | ; Note to developers: Do not make recursive INT 13h calls! |
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| 28 | ; |
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| 29 | ; Int13h_DiskFunctionsHandler |
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[3] | 30 | ; Parameters: |
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| 31 | ; AH: Bios function |
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| 32 | ; DL: Drive number |
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[148] | 33 | ; Other: Depends on function |
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[3] | 34 | ; Returns: |
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| 35 | ; Depends on function |
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| 36 | ;-------------------------------------------------------------------- |
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| 37 | ALIGN JUMP_ALIGN |
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[148] | 38 | Int13h_DiskFunctionsHandler: |
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[3] | 39 | sti ; Enable interrupts |
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[150] | 40 | cld ; String instructions to increment pointers |
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[155] | 41 | CREATE_FRAME_INTPACK_TO_SSBP EXTRA_BYTES_FOR_INTPACK |
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[3] | 42 | |
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| 43 | call RamVars_GetSegmentToDS |
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[294] | 44 | |
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[395] | 45 | %ifdef MODULE_HOTKEYS |
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[148] | 46 | call DriveXlate_ToOrBack |
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[395] | 47 | %endif |
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[148] | 48 | mov [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl |
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[294] | 49 | |
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[322] | 50 | call FindDPT_ForDriveNumberInDL ; DS:DI points to our DPT, or NULL if not our drive |
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| 51 | jc SHORT .NotOurDrive ; DPT not found so this is not one of our drives |
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[258] | 52 | |
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[294] | 53 | .OurFunction: |
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[3] | 54 | ; Jump to correct BIOS function |
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[148] | 55 | eMOVZX bx, ah |
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| 56 | shl bx, 1 |
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[165] | 57 | cmp ah, 25h ; Possible EBIOS function? |
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[176] | 58 | %ifdef MODULE_EBIOS |
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[165] | 59 | ja SHORT .JumpToEbiosFunction |
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[176] | 60 | %else |
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| 61 | ja SHORT Int13h_UnsupportedFunction |
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| 62 | %endif |
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[148] | 63 | jmp [cs:bx+g_rgw13hFuncJump] ; Jump to BIOS function |
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[3] | 64 | |
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[176] | 65 | %ifdef MODULE_EBIOS |
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[165] | 66 | ; Jump to correct EBIOS function |
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| 67 | ALIGN JUMP_ALIGN |
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| 68 | .JumpToEbiosFunction: |
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[167] | 69 | test BYTE [di+DPT.bFlagsLow], FLG_DRVNHEAD_LBA |
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| 70 | jz SHORT Int13h_UnsupportedFunction ; No eINT 13h for CHS drives |
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[322] | 71 | sub bl, 41h<<1 ; BX = Offset to eINT 13h jump table |
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| 72 | jb SHORT Int13h_UnsupportedFunction |
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[167] | 73 | cmp ah, 48h |
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[165] | 74 | ja SHORT Int13h_UnsupportedFunction |
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| 75 | jmp [cs:bx+g_rgwEbiosFunctionJumpTable] |
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[176] | 76 | %endif |
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[3] | 77 | |
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[322] | 78 | ALIGN JUMP_ALIGN |
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| 79 | .NotOurDrive: |
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| 80 | test ah, ah |
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| 81 | jz SHORT .OurFunction ; We handle all function 0h requests (resets) |
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[260] | 82 | |
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[322] | 83 | %ifndef MODULE_SERIAL_FLOPPY |
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| 84 | ; Without floppy support, we handle only hard disk traffic for function 08h. |
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| 85 | test dl, dl |
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| 86 | jns SHORT Int13h_DirectCallToAnotherBios |
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| 87 | %endif |
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| 88 | ; With floppy support, we handle all traffic for function 08h, as we need to wrap both hard disk and floppy drive counts. |
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| 89 | cmp ah, 8 |
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| 90 | je SHORT .OurFunction |
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| 91 | ; Fall to Int13h_DirectCallToAnotherBios |
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| 92 | |
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[3] | 93 | ;-------------------------------------------------------------------- |
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[148] | 94 | ; Int13h_UnsupportedFunction |
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[3] | 95 | ; Int13h_DirectCallToAnotherBios |
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| 96 | ; Parameters: |
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[148] | 97 | ; DL: Translated drive number |
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[3] | 98 | ; DS: RAMVARS segment |
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[150] | 99 | ; SS:BP: Ptr to IDEPACK |
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[148] | 100 | ; BX, DI: Corrupted on Int13h_DiskFunctionsHandler |
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[161] | 101 | ; Other: Function specific INT 13h parameters |
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[3] | 102 | ; Returns: |
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| 103 | ; Depends on function |
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| 104 | ; Corrupts registers: |
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| 105 | ; Flags |
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| 106 | ;-------------------------------------------------------------------- |
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| 107 | ALIGN JUMP_ALIGN |
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| 108 | Int13h_UnsupportedFunction: |
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| 109 | Int13h_DirectCallToAnotherBios: |
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[148] | 110 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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[150] | 111 | mov bx, [bp+IDEPACK.intpack+INTPACK.bx] |
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| 112 | mov di, [bp+IDEPACK.intpack+INTPACK.di] |
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| 113 | mov ds, [bp+IDEPACK.intpack+INTPACK.ds] |
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| 114 | push WORD [bp+IDEPACK.intpack+INTPACK.flags] |
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[148] | 115 | popf |
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| 116 | push bp |
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[150] | 117 | mov bp, [bp+IDEPACK.intpack+INTPACK.bp] |
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[148] | 118 | int BIOS_DISK_INTERRUPT_13h ; Can safely do as much recursion as it wants |
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[3] | 119 | |
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[148] | 120 | ; Store returned values to INTPACK |
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| 121 | pop bp ; Standard INT 13h functions never uses BP as return register |
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| 122 | %ifdef USE_386 |
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[322] | 123 | ; mov [bp+IDEPACK.intpack+INTPACK.gs], gs |
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| 124 | ; mov [bp+IDEPACK.intpack+INTPACK.fs], fs |
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[148] | 125 | %endif |
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[150] | 126 | mov [bp+IDEPACK.intpack+INTPACK.es], es |
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| 127 | mov [bp+IDEPACK.intpack+INTPACK.ds], ds |
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| 128 | mov [bp+IDEPACK.intpack+INTPACK.di], di |
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| 129 | mov [bp+IDEPACK.intpack+INTPACK.si], si |
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| 130 | mov [bp+IDEPACK.intpack+INTPACK.bx], bx |
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| 131 | mov [bp+IDEPACK.intpack+INTPACK.dh], dh |
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| 132 | mov [bp+IDEPACK.intpack+INTPACK.cx], cx |
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| 133 | mov [bp+IDEPACK.intpack+INTPACK.ax], ax |
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[148] | 134 | pushf |
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[150] | 135 | pop WORD [bp+IDEPACK.intpack+INTPACK.flags] |
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[148] | 136 | call RamVars_GetSegmentToDS |
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| 137 | cmp dl, [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv] |
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| 138 | je SHORT .ExchangeInt13hHandlers |
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[150] | 139 | mov [bp+IDEPACK.intpack+INTPACK.dl], dl ; Something is returned in DL |
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[148] | 140 | ALIGN JUMP_ALIGN |
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| 141 | .ExchangeInt13hHandlers: |
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[249] | 142 | %ifdef USE_186 |
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| 143 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 144 | jmp SHORT ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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| 145 | %else |
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[148] | 146 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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[249] | 147 | jmp SHORT Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 148 | %endif |
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[3] | 149 | |
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[260] | 150 | %ifdef MODULE_SERIAL_FLOPPY |
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| 151 | ;-------------------------------------------------------------------- |
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| 152 | ; Int13h_ReturnSuccessForFloppy |
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| 153 | ; |
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| 154 | ; Some operations, such as format of a floppy disk track, should just |
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| 155 | ; return success, while for hard disks it should be treated as unsupported. |
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| 156 | ;-------------------------------------------------------------------- |
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| 157 | ALIGN JUMP_ALIGN |
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| 158 | Int13h_ReturnSuccessForFloppy: |
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| 159 | test dl, dl |
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| 160 | js short Int13h_UnsupportedFunction |
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[294] | 161 | xor ah, ah |
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[260] | 162 | jmp short Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 163 | %endif |
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[3] | 164 | |
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| 165 | ;-------------------------------------------------------------------- |
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[249] | 166 | ; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL |
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| 167 | ; Parameters: |
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| 168 | ; AH: BIOS Error code |
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| 169 | ; CL: Number of sectors actually transferred |
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| 170 | ; SS:BP: Ptr to IDEPACK |
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| 171 | ; Returns: |
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| 172 | ; All registers are loaded from INTPACK |
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| 173 | ;-------------------------------------------------------------------- |
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| 174 | ALIGN JUMP_ALIGN |
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| 175 | Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL: |
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| 176 | mov [bp+IDEPACK.intpack+INTPACK.al], cl |
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| 177 | ; Fall to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 178 | |
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| 179 | ;-------------------------------------------------------------------- |
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[148] | 180 | ; Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 181 | ; Int13h_ReturnFromHandlerWithoutStoringErrorCode |
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[32] | 182 | ; Parameters: |
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[148] | 183 | ; AH: BIOS Error code |
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[150] | 184 | ; SS:BP: Ptr to IDEPACK |
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[32] | 185 | ; Returns: |
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[148] | 186 | ; All registers are loaded from INTPACK |
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[32] | 187 | ;-------------------------------------------------------------------- |
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| 188 | ALIGN JUMP_ALIGN |
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[148] | 189 | Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH: |
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[258] | 190 | %ifdef MODULE_SERIAL_FLOPPY |
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| 191 | mov al, [bp+IDEPACK.intpack+INTPACK.dl] |
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[294] | 192 | Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH_ALHasDriveNumber: |
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[258] | 193 | call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber |
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| 194 | %else |
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[150] | 195 | call Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH |
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[258] | 196 | %endif |
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[148] | 197 | Int13h_ReturnFromHandlerWithoutStoringErrorCode: |
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[150] | 198 | or WORD [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_IF ; Return with interrupts enabled |
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[148] | 199 | mov sp, bp ; Now we can exit anytime |
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[155] | 200 | RESTORE_FRAME_INTPACK_FROM_SSBP EXTRA_BYTES_FOR_INTPACK |
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[32] | 201 | |
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| 202 | |
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| 203 | ;-------------------------------------------------------------------- |
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[148] | 204 | ; Int13h_CallPreviousInt13hHandler |
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[3] | 205 | ; Parameters: |
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[148] | 206 | ; AH: INT 13h function to call |
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| 207 | ; DL: Drive number |
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| 208 | ; DS: RAMVARS segment |
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[3] | 209 | ; Returns: |
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| 210 | ; Depends on function |
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[294] | 211 | ; NOTE: ES:DI needs to be returned from the previous interrupt |
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[258] | 212 | ; handler, for floppy DPT in function 08h |
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[3] | 213 | ; Corrupts registers: |
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[258] | 214 | ; None |
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[3] | 215 | ;-------------------------------------------------------------------- |
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| 216 | ALIGN JUMP_ALIGN |
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[148] | 217 | Int13h_CallPreviousInt13hHandler: |
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| 218 | call ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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| 219 | int BIOS_DISK_INTERRUPT_13h |
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[258] | 220 | ;;; fall-through to ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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[35] | 221 | |
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[3] | 222 | ;-------------------------------------------------------------------- |
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[148] | 223 | ; ExchangeCurrentInt13hHandlerWithOldInt13hHandler |
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[3] | 224 | ; Parameters: |
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| 225 | ; DS: RAMVARS segment |
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| 226 | ; Returns: |
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[148] | 227 | ; Nothing |
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[3] | 228 | ; Corrupts registers: |
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[258] | 229 | ; Nothing |
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| 230 | ; Note: Flags are preserved |
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[3] | 231 | ;-------------------------------------------------------------------- |
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| 232 | ALIGN JUMP_ALIGN |
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[148] | 233 | ExchangeCurrentInt13hHandlerWithOldInt13hHandler: |
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| 234 | push es |
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[258] | 235 | push si |
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| 236 | LOAD_BDA_SEGMENT_PRESERVE_FLAGS_TO es, si |
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| 237 | mov si, [RAMVARS.fpOldI13h] |
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[150] | 238 | cli |
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[258] | 239 | xchg si, [es:BIOS_DISK_INTERRUPT_13h*4] |
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| 240 | mov [RAMVARS.fpOldI13h], si |
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| 241 | mov si, [RAMVARS.fpOldI13h+2] |
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| 242 | xchg si, [es:BIOS_DISK_INTERRUPT_13h*4+2] |
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[181] | 243 | sti |
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[258] | 244 | mov [RAMVARS.fpOldI13h+2], si |
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| 245 | pop si |
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[148] | 246 | pop es |
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| 247 | ret |
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[28] | 248 | |
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[35] | 249 | |
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[150] | 250 | ;-------------------------------------------------------------------- |
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| 251 | ; Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH |
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| 252 | ; Int13h_SetErrorCodeToIntpackInSSBPfromAH |
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| 253 | ; Parameters: |
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| 254 | ; AH: BIOS error code (00h = no error) |
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| 255 | ; SS:BP: Ptr to IDEPACK |
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| 256 | ; Returns: |
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| 257 | ; SS:BP: Ptr to IDEPACK with error condition set |
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| 258 | ; Corrupts registers: |
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| 259 | ; DS, DI |
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| 260 | ;-------------------------------------------------------------------- |
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| 261 | ALIGN JUMP_ALIGN |
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[258] | 262 | %ifdef MODULE_SERIAL_FLOPPY |
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| 263 | Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH_ALHasDriveNumber: |
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| 264 | ; Store error code to BDA |
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| 265 | mov bx, BDA.bHDLastSt |
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| 266 | test al, al |
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| 267 | js .HardDisk |
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| 268 | mov bl, BDA.bFDRetST & 0xff |
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| 269 | .HardDisk: |
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| 270 | LOAD_BDA_SEGMENT_TO ds, di |
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[294] | 271 | mov [bx], ah |
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[258] | 272 | %else |
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[150] | 273 | Int13h_SetErrorCodeToBdaAndToIntpackInSSBPfromAH: |
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| 274 | ; Store error code to BDA |
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[294] | 275 | LOAD_BDA_SEGMENT_TO ds, di |
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[150] | 276 | mov [BDA.bHDLastSt], ah |
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[258] | 277 | %endif |
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[35] | 278 | |
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[150] | 279 | ; Store error code to INTPACK |
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| 280 | Int13h_SetErrorCodeToIntpackInSSBPfromAH: |
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| 281 | mov [bp+IDEPACK.intpack+INTPACK.ah], ah |
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| 282 | test ah, ah |
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| 283 | jnz SHORT .SetCFtoIntpack |
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| 284 | and BYTE [bp+IDEPACK.intpack+INTPACK.flags], ~FLG_FLAGS_CF |
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| 285 | ret |
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| 286 | .SetCFtoIntpack: |
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| 287 | or BYTE [bp+IDEPACK.intpack+INTPACK.flags], FLG_FLAGS_CF |
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| 288 | ret |
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| 289 | |
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| 290 | |
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[3] | 291 | ; Jump table for correct BIOS function |
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| 292 | ALIGN WORD_ALIGN |
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| 293 | g_rgw13hFuncJump: |
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| 294 | dw AH0h_HandlerForDiskControllerReset ; 00h, Disk Controller Reset (All) |
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| 295 | dw AH1h_HandlerForReadDiskStatus ; 01h, Read Disk Status (All) |
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| 296 | dw AH2h_HandlerForReadDiskSectors ; 02h, Read Disk Sectors (All) |
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| 297 | dw AH3h_HandlerForWriteDiskSectors ; 03h, Write Disk Sectors (All) |
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| 298 | dw AH4h_HandlerForVerifyDiskSectors ; 04h, Verify Disk Sectors (All) |
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[260] | 299 | %ifdef MODULE_SERIAL_FLOPPY |
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| 300 | dw Int13h_ReturnSuccessForFloppy ; 05h, Format Disk Track (XT, AT, EISA) |
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| 301 | %else |
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[90] | 302 | dw Int13h_UnsupportedFunction ; 05h, Format Disk Track (XT, AT, EISA) |
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[260] | 303 | %endif |
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[3] | 304 | dw Int13h_UnsupportedFunction ; 06h, Format Disk Track with Bad Sectors (XT) |
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| 305 | dw Int13h_UnsupportedFunction ; 07h, Format Multiple Cylinders (XT) |
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| 306 | dw AH8h_HandlerForReadDiskDriveParameters ; 08h, Read Disk Drive Parameters (All) |
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| 307 | dw AH9h_HandlerForInitializeDriveParameters ; 09h, Initialize Drive Parameters (All) |
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| 308 | dw Int13h_UnsupportedFunction ; 0Ah, Read Disk Sectors with ECC (XT, AT, EISA) |
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| 309 | dw Int13h_UnsupportedFunction ; 0Bh, Write Disk Sectors with ECC (XT, AT, EISA) |
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| 310 | dw AHCh_HandlerForSeek ; 0Ch, Seek (All) |
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| 311 | dw AHDh_HandlerForResetHardDisk ; 0Dh, Alternate Disk Reset (All) |
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| 312 | dw Int13h_UnsupportedFunction ; 0Eh, Read Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2) |
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| 313 | dw Int13h_UnsupportedFunction ; 0Fh, Write Sector Buffer (XT, PS/1), ESDI Undocumented Diagnostic (PS/2) |
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| 314 | dw AH10h_HandlerForCheckDriveReady ; 10h, Check Drive Ready (All) |
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| 315 | dw AH11h_HandlerForRecalibrate ; 11h, Recalibrate (All) |
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| 316 | dw Int13h_UnsupportedFunction ; 12h, Controller RAM Diagnostic (XT) |
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| 317 | dw Int13h_UnsupportedFunction ; 13h, Drive Diagnostic (XT) |
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[90] | 318 | dw Int13h_UnsupportedFunction ; 14h, Controller Internal Diagnostic (All) |
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[3] | 319 | dw AH15h_HandlerForReadDiskDriveSize ; 15h, Read Disk Drive Size (AT+) |
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[161] | 320 | dw Int13h_UnsupportedFunction ; 16h, |
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| 321 | dw Int13h_UnsupportedFunction ; 17h, |
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| 322 | dw Int13h_UnsupportedFunction ; 18h, |
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[3] | 323 | dw Int13h_UnsupportedFunction ; 19h, Park Heads (PS/2) |
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| 324 | dw Int13h_UnsupportedFunction ; 1Ah, Format ESDI Drive (PS/2) |
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| 325 | dw Int13h_UnsupportedFunction ; 1Bh, Get ESDI Manufacturing Header (PS/2) |
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| 326 | dw Int13h_UnsupportedFunction ; 1Ch, ESDI Special Functions (PS/2) |
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[161] | 327 | dw Int13h_UnsupportedFunction ; 1Dh, |
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| 328 | dw Int13h_UnsupportedFunction ; 1Eh, |
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| 329 | dw Int13h_UnsupportedFunction ; 1Fh, |
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| 330 | dw Int13h_UnsupportedFunction ; 20h, |
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[3] | 331 | dw Int13h_UnsupportedFunction ; 21h, Read Disk Sectors, Multiple Blocks (PS/1) |
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| 332 | dw Int13h_UnsupportedFunction ; 22h, Write Disk Sectors, Multiple Blocks (PS/1) |
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| 333 | dw AH23h_HandlerForSetControllerFeatures ; 23h, Set Controller Features Register (PS/1) |
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| 334 | dw AH24h_HandlerForSetMultipleBlocks ; 24h, Set Multiple Blocks (PS/1) |
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| 335 | dw AH25h_HandlerForGetDriveInformation ; 25h, Get Drive Information (PS/1) |
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[165] | 336 | |
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[176] | 337 | %ifdef MODULE_EBIOS |
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[165] | 338 | g_rgwEbiosFunctionJumpTable: |
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| 339 | dw AH41h_HandlerForCheckIfExtensionsPresent ; 41h, Check if Extensions Present (EBIOS)* |
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| 340 | dw AH42h_HandlerForExtendedReadSectors ; 42h, Extended Read Sectors (EBIOS)* |
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| 341 | dw AH43h_HandlerForExtendedWriteSectors ; 43h, Extended Write Sectors (EBIOS)* |
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| 342 | dw AH44h_HandlerForExtendedVerifySectors ; 44h, Extended Verify Sectors (EBIOS)* |
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| 343 | dw Int13h_UnsupportedFunction ; 45h, Lock and Unlock Drive (EBIOS)*** |
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| 344 | dw Int13h_UnsupportedFunction ; 46h, Eject Media Request (EBIOS)*** |
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| 345 | dw AH47h_HandlerForExtendedSeek ; 47h, Extended Seek (EBIOS)* |
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| 346 | dw AH48h_HandlerForGetExtendedDriveParameters ; 48h, Get Extended Drive Parameters (EBIOS)* |
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[150] | 347 | ; dw Int13h_UnsupportedFunction ; 49h, Get Extended Disk Change Status (EBIOS)*** |
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[3] | 348 | ; dw Int13h_UnsupportedFunction ; 4Ah, Initiate Disk Emulation (Bootable CD-ROM) |
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| 349 | ; dw Int13h_UnsupportedFunction ; 4Bh, Terminate Disk Emulation (Bootable CD-ROM) |
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| 350 | ; dw Int13h_UnsupportedFunction ; 4Ch, Initiate Disk Emulation and Boot (Bootable CD-ROM) |
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| 351 | ; dw Int13h_UnsupportedFunction ; 4Dh, Return Boot Catalog (Bootable CD-ROM) |
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[150] | 352 | ; dw Int13h_UnsupportedFunction ; 4Eh, Set Hardware Configuration (EBIOS)** |
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| 353 | ; |
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| 354 | ; * = Enhanced Drive Access Support (minimum required EBIOS functions) |
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| 355 | ; ** = Enhanced Disk Drive (EDD) Support |
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| 356 | ; *** = Drive Locking and Ejecting Support |
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[181] | 357 | %endif |
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