[57] | 1 | ; Project name : XTIDE Universal BIOS Configurator v2 |
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| 2 | ; Description : Functions for accessing file and flash buffers. |
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| 3 | |
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[376] | 4 | ; |
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[526] | 5 | ; XTIDE Universal BIOS and Associated Tools |
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[376] | 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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[526] | 12 | ; |
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[376] | 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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[526] | 16 | ; GNU General Public License for more details. |
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[376] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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[526] | 18 | ; |
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[376] | 19 | |
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[57] | 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 | ; Buffers_Clear |
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| 25 | ; Parameters: |
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| 26 | ; Nothing |
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| 27 | ; Returns: |
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| 28 | ; Nothing |
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| 29 | ; Corrupts registers: |
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| 30 | ; AX, CX, DI, ES |
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| 31 | ;-------------------------------------------------------------------- |
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| 32 | ALIGN JUMP_ALIGN |
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| 33 | Buffers_Clear: |
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| 34 | call Buffers_GetFileBufferToESDI |
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| 35 | mov cx, ROMVARS_size |
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| 36 | jmp Memory_ZeroESDIwithSizeInCX |
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| 37 | |
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| 38 | |
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| 39 | ;-------------------------------------------------------------------- |
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| 40 | ; Buffers_IsXtideUniversalBiosLoaded |
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| 41 | ; Parameters: |
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| 42 | ; Nothing |
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| 43 | ; Returns: |
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| 44 | ; ZF: Set if supported version of XTIDE Universal BIOS is loaded |
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[567] | 45 | ; Cleared if no file or some other file is loaded |
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[57] | 46 | ; Corrupts registers: |
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| 47 | ; CX, SI, DI, ES |
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| 48 | ;-------------------------------------------------------------------- |
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| 49 | ALIGN JUMP_ALIGN |
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| 50 | Buffers_IsXtideUniversalBiosLoaded: |
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[592] | 51 | test BYTE [cs:g_cfgVars+CFGVARS.wFlags], FLG_CFGVARS_FILELOADED | FLG_CFGVARS_ROMLOADED |
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[567] | 52 | jnz SHORT .FileOrBiosLoaded |
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[592] | 53 | test sp, sp ; Clear ZF |
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[57] | 54 | ret |
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| 55 | |
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[567] | 56 | .FileOrBiosLoaded: |
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| 57 | call Buffers_GetFileBufferToESDI |
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| 58 | ; Fall to Buffers_IsXtideUniversalBiosSignatureInESDI |
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[57] | 59 | |
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[567] | 60 | |
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[57] | 61 | ;-------------------------------------------------------------------- |
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| 62 | ; Buffers_IsXtideUniversalBiosSignatureInESDI |
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| 63 | ; Parameters: |
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| 64 | ; ES:DI: Ptr to possible XTIDE Universal BIOS location |
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| 65 | ; Returns: |
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| 66 | ; ZF: Set if supported version of XTIDE Universal BIOS is loaded |
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[567] | 67 | ; Cleared if no file or some other file is loaded |
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[57] | 68 | ; Corrupts registers: |
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| 69 | ; CX, SI |
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| 70 | ;-------------------------------------------------------------------- |
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| 71 | ALIGN JUMP_ALIGN |
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| 72 | Buffers_IsXtideUniversalBiosSignatureInESDI: |
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| 73 | push di |
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| 74 | |
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[614] | 75 | mov si, g_sXtideUniversalBiosSignature |
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[57] | 76 | add di, BYTE ROMVARS.rgbSign |
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| 77 | mov cx, XTIDE_SIGNATURE_LENGTH / 2 |
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[592] | 78 | %ifdef CLD_NEEDED |
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[57] | 79 | cld |
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[592] | 80 | %endif |
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[57] | 81 | eSEG_STR repe, cs, cmpsw |
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| 82 | |
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| 83 | pop di |
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| 84 | ret |
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| 85 | |
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| 86 | |
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| 87 | ;-------------------------------------------------------------------- |
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[457] | 88 | ; Buffers_IsXTbuildLoaded |
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| 89 | ; Parameters: |
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| 90 | ; Nothing |
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| 91 | ; Returns: |
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| 92 | ; ZF: Set if XT or XT+ build is loaded |
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| 93 | ; Cleared if some other (AT, 386) build is loaded |
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| 94 | ; Corrupts registers: |
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[592] | 95 | ; Nothing |
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[457] | 96 | ;-------------------------------------------------------------------- |
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| 97 | ALIGN JUMP_ALIGN |
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| 98 | Buffers_IsXTbuildLoaded: |
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| 99 | %strlen BUILD_TYPE_OFFSET TITLE_STRING_START |
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[592] | 100 | push es |
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| 101 | push di |
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[457] | 102 | call Buffers_GetFileBufferToESDI |
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| 103 | cmp WORD [es:di+ROMVARS.szTitle+BUILD_TYPE_OFFSET+1], 'XT' ; +1 is for '(' |
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[592] | 104 | pop di |
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| 105 | pop es |
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[457] | 106 | ret |
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| 107 | %undef BUILD_TYPE_OFFSET |
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| 108 | |
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| 109 | |
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| 110 | ;-------------------------------------------------------------------- |
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[596] | 111 | ; Buffers_NewBiosWithSizeInDXCXandSourceInALhasBeenLoadedForConfiguration |
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[57] | 112 | ; Parameters: |
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[592] | 113 | ; AL: EEPROM source (FLG_CFGVARS_FILELOADED or FLG_CFGVARS_ROMLOADED) |
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[68] | 114 | ; DX:CX: EEPROM size in bytes |
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[57] | 115 | ; Returns: |
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| 116 | ; Nothing |
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| 117 | ; Corrupts registers: |
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[592] | 118 | ; CX, DX |
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[57] | 119 | ;-------------------------------------------------------------------- |
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| 120 | ALIGN JUMP_ALIGN |
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[596] | 121 | Buffers_NewBiosWithSizeInDXCXandSourceInALhasBeenLoadedForConfiguration: |
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[592] | 122 | and BYTE [cs:g_cfgVars+CFGVARS.wFlags], ~(FLG_CFGVARS_FILELOADED | FLG_CFGVARS_ROMLOADED | FLG_CFGVARS_UNSAVED) |
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| 123 | or [cs:g_cfgVars+CFGVARS.wFlags], al |
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[68] | 124 | shr dx, 1 |
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| 125 | rcr cx, 1 |
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[144] | 126 | adc cx, BYTE 0 ; Round up to next WORD |
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[65] | 127 | mov [cs:g_cfgVars+CFGVARS.wImageSizeInWords], cx |
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[57] | 128 | ret |
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| 129 | |
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| 130 | |
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| 131 | ;-------------------------------------------------------------------- |
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| 132 | ; Buffers_SetUnsavedChanges |
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| 133 | ; Buffers_ClearUnsavedChanges |
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| 134 | ; Parameters: |
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| 135 | ; SS:BP: Menu handle |
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| 136 | ; Returns: |
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| 137 | ; Nothing |
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| 138 | ; Corrupts registers: |
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| 139 | ; Nothing |
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| 140 | ;-------------------------------------------------------------------- |
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| 141 | ALIGN JUMP_ALIGN |
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| 142 | Buffers_SetUnsavedChanges: |
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[592] | 143 | or BYTE [cs:g_cfgVars+CFGVARS.wFlags], FLG_CFGVARS_UNSAVED |
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[57] | 144 | ret |
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| 145 | |
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| 146 | ALIGN JUMP_ALIGN |
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| 147 | Buffers_ClearUnsavedChanges: |
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[592] | 148 | and BYTE [cs:g_cfgVars+CFGVARS.wFlags], ~FLG_CFGVARS_UNSAVED |
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[57] | 149 | ret |
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| 150 | |
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| 151 | |
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| 152 | ;-------------------------------------------------------------------- |
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[59] | 153 | ; Buffers_SaveChangesIfFileLoaded |
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| 154 | ; Parameters: |
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| 155 | ; Nothing |
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| 156 | ; Returns: |
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| 157 | ; Nothing |
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| 158 | ; Corrupts registers: |
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| 159 | ; AX, BX, CX, SI, DI |
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| 160 | ;-------------------------------------------------------------------- |
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| 161 | ALIGN JUMP_ALIGN |
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| 162 | Buffers_SaveChangesIfFileLoaded: |
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[592] | 163 | mov al, [cs:g_cfgVars+CFGVARS.wFlags] |
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| 164 | and al, FLG_CFGVARS_FILELOADED | FLG_CFGVARS_UNSAVED |
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| 165 | jz SHORT .NothingToSave |
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| 166 | jpo SHORT .NothingToSave |
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| 167 | mov bx, g_szDlgSaveChanges |
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| 168 | call Dialogs_DisplayYesNoResponseDialogWithTitleStringInBX |
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[59] | 169 | jnz SHORT .NothingToSave |
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| 170 | jmp BiosFile_SaveUnsavedChanges |
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| 171 | ALIGN JUMP_ALIGN |
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| 172 | .NothingToSave: |
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| 173 | ret |
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| 174 | |
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[620] | 175 | ;-------------------------------------------------------------------- |
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| 176 | ; Buffers_GetSelectedEepromSizeInWordsToAX |
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| 177 | ; Parameters: |
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| 178 | ; Nothing |
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| 179 | ; Returns: |
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| 180 | ; AX: Selected EEPROM size in WORDs |
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| 181 | ; Corrupts registers: |
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| 182 | ; BX |
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| 183 | ;-------------------------------------------------------------------- |
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| 184 | ALIGN JUMP_ALIGN |
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| 185 | Buffers_GetSelectedEepromSizeInWordsToAX: |
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| 186 | eMOVZX bx, [cs:g_cfgVars+CFGVARS.bEepromType] |
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| 187 | mov ax, [cs:bx+g_rgwEepromTypeToSizeInWords] |
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[59] | 188 | |
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[620] | 189 | cmp bl, EEPROM_TYPE.SST_39SF |
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| 190 | jnz SHORT .HaveEepromSize |
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| 191 | cmp ax, [cs:g_cfgVars+CFGVARS.wImageSizeInWords] |
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| 192 | jae SHORT .HaveEepromSize |
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| 193 | shl ax, 1 ; Auto-double SST size when too small. |
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| 194 | .HaveEepromSize: |
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| 195 | ret |
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| 196 | |
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[59] | 197 | ;-------------------------------------------------------------------- |
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[65] | 198 | ; Buffers_AppendZeroesIfNeeded |
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| 199 | ; Parameters: |
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| 200 | ; Nothing |
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| 201 | ; Returns: |
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| 202 | ; Nothing |
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| 203 | ; Corrupts registers: |
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[620] | 204 | ; AX, BX, CX, DI |
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[65] | 205 | ;-------------------------------------------------------------------- |
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| 206 | ALIGN JUMP_ALIGN |
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| 207 | Buffers_AppendZeroesIfNeeded: |
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| 208 | push es |
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| 209 | |
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[620] | 210 | call Buffers_GetSelectedEepromSizeInWordsToAX |
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| 211 | mov cx, ax |
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[65] | 212 | sub cx, [cs:g_cfgVars+CFGVARS.wImageSizeInWords] ; CX = WORDs to append |
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[567] | 213 | jbe SHORT .NoNeedToAppendZeroes |
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[65] | 214 | |
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| 215 | call Buffers_GetFileBufferToESDI |
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| 216 | mov ax, [cs:g_cfgVars+CFGVARS.wImageSizeInWords] |
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[592] | 217 | eSHL_IM ax, 1 |
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[65] | 218 | add di, ax ; ES:DI now point first unused image byte |
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| 219 | xor ax, ax |
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[592] | 220 | %ifdef CLD_NEEDED |
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[65] | 221 | cld |
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[592] | 222 | %endif |
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[65] | 223 | rep stosw |
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| 224 | ALIGN JUMP_ALIGN |
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| 225 | .NoNeedToAppendZeroes: |
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| 226 | pop es |
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| 227 | ret |
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| 228 | |
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| 229 | |
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| 230 | ;-------------------------------------------------------------------- |
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[57] | 231 | ; Buffers_GenerateChecksum |
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| 232 | ; Parameters: |
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| 233 | ; Nothing |
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| 234 | ; Returns: |
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| 235 | ; Nothing |
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| 236 | ; Corrupts registers: |
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| 237 | ; AX, BX, CX, DI |
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| 238 | ;-------------------------------------------------------------------- |
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| 239 | ALIGN JUMP_ALIGN |
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| 240 | Buffers_GenerateChecksum: |
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| 241 | push es |
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[484] | 242 | push dx |
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[57] | 243 | |
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| 244 | call Buffers_GetFileBufferToESDI |
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[484] | 245 | call EEPROM_GetXtideUniversalBiosSizeFromESDItoDXCX |
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[592] | 246 | %ifdef CLD_NEEDED |
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| 247 | cld |
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| 248 | %endif |
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[589] | 249 | |
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| 250 | ; Compatibility fix for 3Com 3C503 cards where the ASIC returns 8080h as the last two bytes of the ROM. |
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| 251 | |
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| 252 | ; Assume the BIOS size is not 8K, ie generate a normal checksum. |
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| 253 | dec cx |
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| 254 | mov ax, 100h |
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| 255 | cmp cx, 8192 - 1 |
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| 256 | jne SHORT .BiosSizeIsNot8K |
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| 257 | ; The BIOS size is 8K and therefore a potential candidate for a 3Com 3C503 card. |
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[592] | 258 | mov cl, (8192 - 3) & 0FFh |
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[589] | 259 | mov ah, 3 |
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[57] | 260 | ALIGN JUMP_ALIGN |
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[589] | 261 | .BiosSizeIsNot8K: |
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[57] | 262 | .SumNextByte: |
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| 263 | add al, [es:di] |
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| 264 | inc di |
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| 265 | loop .SumNextByte |
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[592] | 266 | .NextChecksumByte: |
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[57] | 267 | neg al |
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[592] | 268 | stosb |
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[589] | 269 | dec ah |
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| 270 | jnz SHORT .NextChecksumByte |
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[57] | 271 | |
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[484] | 272 | pop dx |
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[57] | 273 | pop es |
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| 274 | ret |
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| 275 | |
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| 276 | |
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| 277 | ;-------------------------------------------------------------------- |
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[59] | 278 | ; Buffers_GetRomvarsFlagsToAX |
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| 279 | ; Parameters: |
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| 280 | ; Nothing |
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| 281 | ; Returns: |
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| 282 | ; AX: ROMVARS.wFlags |
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| 283 | ; Corrupts registers: |
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| 284 | ; BX |
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| 285 | ;-------------------------------------------------------------------- |
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| 286 | ALIGN JUMP_ALIGN |
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| 287 | Buffers_GetRomvarsFlagsToAX: |
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| 288 | mov bx, ROMVARS.wFlags |
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| 289 | ; Fall to Buffers_GetRomvarsValueToAXfromOffsetInBX |
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| 290 | |
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| 291 | ;-------------------------------------------------------------------- |
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[57] | 292 | ; Buffers_GetRomvarsValueToAXfromOffsetInBX |
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| 293 | ; Parameters: |
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| 294 | ; BX: ROMVARS offset |
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| 295 | ; Returns: |
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| 296 | ; AX: Value |
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| 297 | ; Corrupts registers: |
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| 298 | ; Nothing |
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| 299 | ;-------------------------------------------------------------------- |
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| 300 | ALIGN JUMP_ALIGN |
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| 301 | Buffers_GetRomvarsValueToAXfromOffsetInBX: |
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| 302 | push es |
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| 303 | push di |
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| 304 | call Buffers_GetFileBufferToESDI |
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| 305 | mov ax, [es:bx+di] |
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| 306 | pop di |
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| 307 | pop es |
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| 308 | ret |
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| 309 | |
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| 310 | |
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| 311 | ;-------------------------------------------------------------------- |
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[204] | 312 | ; Buffers_GetIdeControllerCountToCX |
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| 313 | ; Parameters: |
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| 314 | ; SS:BP: Menu handle |
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| 315 | ; Returns: |
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| 316 | ; CX: Number of IDE controllers to configure |
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| 317 | ; ES:DI: Ptr to file buffer |
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| 318 | ; Corrupts registers: |
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[589] | 319 | ; Nothing |
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[204] | 320 | ;-------------------------------------------------------------------- |
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| 321 | ALIGN JUMP_ALIGN |
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| 322 | Buffers_GetIdeControllerCountToCX: |
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[589] | 323 | xor cx, cx |
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[204] | 324 | call Buffers_GetFileBufferToESDI |
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[589] | 325 | or cl, [es:di+ROMVARS.bIdeCnt] |
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| 326 | jnz SHORT .LimitControllerCountForLiteMode |
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| 327 | inc cx ; Make sure there is at least one controller |
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[204] | 328 | |
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[589] | 329 | .LimitControllerCountForLiteMode: |
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[204] | 330 | test BYTE [es:di+ROMVARS.wFlags], FLG_ROMVARS_FULLMODE |
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| 331 | jnz SHORT .ReturnControllerCountInCX |
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[589] | 332 | MIN_U cl, MAX_LITE_MODE_CONTROLLERS |
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[204] | 333 | |
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| 334 | .ReturnControllerCountInCX: |
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| 335 | ret |
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| 336 | |
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| 337 | |
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| 338 | ;-------------------------------------------------------------------- |
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[65] | 339 | ; Buffers_GetFlashComparisonBufferToESDI |
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[57] | 340 | ; Buffers_GetFileDialogItemBufferToESDI |
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[592] | 341 | ; Buffers_GetFileBufferToESDI |
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[57] | 342 | ; Parameters: |
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| 343 | ; Nothing |
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| 344 | ; Returns: |
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| 345 | ; ES:DI: Ptr to file buffer |
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| 346 | ; Corrupts registers: |
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| 347 | ; Nothing |
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| 348 | ;-------------------------------------------------------------------- |
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| 349 | ALIGN JUMP_ALIGN |
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[65] | 350 | Buffers_GetFlashComparisonBufferToESDI: |
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[57] | 351 | Buffers_GetFileDialogItemBufferToESDI: |
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[59] | 352 | call Buffers_GetFileBufferToESDI |
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| 353 | mov di, es |
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[592] | 354 | SKIP2B f |
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[57] | 355 | Buffers_GetFileBufferToESDI: |
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| 356 | mov di, cs |
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| 357 | add di, 1000h ; Change to next 64k page |
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| 358 | mov es, di |
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| 359 | xor di, di ; Ptr now in ES:DI |
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| 360 | ret |
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