[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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[621] | 51 | test BYTE [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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[621] | 122 | and BYTE [g_cfgVars+CFGVARS.wFlags], ~(FLG_CFGVARS_FILELOADED | FLG_CFGVARS_ROMLOADED | FLG_CFGVARS_UNSAVED)
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| 123 | or [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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[621] | 127 | mov [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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[621] | 143 | or BYTE [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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[621] | 148 | and BYTE [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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[621] | 163 | test BYTE [g_cfgVars+CFGVARS.wFlags], FLG_CFGVARS_FILELOADED | FLG_CFGVARS_UNSAVED
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[592] | 164 | jz SHORT .NothingToSave
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| 165 | jpo SHORT .NothingToSave
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| 166 | mov bx, g_szDlgSaveChanges
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| 167 | call Dialogs_DisplayYesNoResponseDialogWithTitleStringInBX
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[59] | 168 | jnz SHORT .NothingToSave
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| 169 | jmp BiosFile_SaveUnsavedChanges
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| 170 | ALIGN JUMP_ALIGN
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| 171 | .NothingToSave:
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| 172 | ret
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| 173 |
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[620] | 174 | ;--------------------------------------------------------------------
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| 175 | ; Buffers_GetSelectedEepromSizeInWordsToAX
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| 176 | ; Parameters:
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| 177 | ; Nothing
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| 178 | ; Returns:
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| 179 | ; AX: Selected EEPROM size in WORDs
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| 180 | ; Corrupts registers:
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| 181 | ; BX
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| 182 | ;--------------------------------------------------------------------
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| 183 | ALIGN JUMP_ALIGN
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| 184 | Buffers_GetSelectedEepromSizeInWordsToAX:
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[621] | 185 | eMOVZX bx, [g_cfgVars+CFGVARS.bEepromType]
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| 186 | mov ax, [bx+g_rgwEepromTypeToSizeInWords]
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[59] | 187 |
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[620] | 188 | cmp bl, EEPROM_TYPE.SST_39SF
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[621] | 189 | jne SHORT .HaveEepromSize
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| 190 | cmp ax, [g_cfgVars+CFGVARS.wImageSizeInWords]
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| 191 | jae SHORT .HaveEepromSize
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| 192 | eSHL_IM ax, 1 ; Auto-double SST size when too small.
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[620] | 193 | .HaveEepromSize:
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| 194 | ret
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| 195 |
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[59] | 196 | ;--------------------------------------------------------------------
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[65] | 197 | ; Buffers_AppendZeroesIfNeeded
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| 198 | ; Parameters:
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| 199 | ; Nothing
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| 200 | ; Returns:
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| 201 | ; Nothing
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| 202 | ; Corrupts registers:
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[620] | 203 | ; AX, BX, CX, DI
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[65] | 204 | ;--------------------------------------------------------------------
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| 205 | ALIGN JUMP_ALIGN
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| 206 | Buffers_AppendZeroesIfNeeded:
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[620] | 207 | call Buffers_GetSelectedEepromSizeInWordsToAX
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[621] | 208 | mov cx, [g_cfgVars+CFGVARS.wImageSizeInWords]
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| 209 | sub ax, cx ; AX = WORDs to append
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[567] | 210 | jbe SHORT .NoNeedToAppendZeroes
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[65] | 211 |
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[621] | 212 | eSHL_IM cx, 1
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| 213 | push es
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[65] | 214 | call Buffers_GetFileBufferToESDI
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[621] | 215 | add di, cx ; ES:DI now point first unused image byte
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| 216 | xor cx, cx
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| 217 | xchg cx, ax
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[592] | 218 | %ifdef CLD_NEEDED
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[65] | 219 | cld
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[592] | 220 | %endif
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[65] | 221 | rep stosw
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[621] | 222 | pop es
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[65] | 223 | .NoNeedToAppendZeroes:
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| 224 | ret
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| 225 |
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| 226 |
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| 227 | ;--------------------------------------------------------------------
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[57] | 228 | ; Buffers_GenerateChecksum
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| 229 | ; Parameters:
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| 230 | ; Nothing
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| 231 | ; Returns:
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| 232 | ; Nothing
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| 233 | ; Corrupts registers:
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| 234 | ; AX, BX, CX, DI
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| 235 | ;--------------------------------------------------------------------
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| 236 | ALIGN JUMP_ALIGN
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| 237 | Buffers_GenerateChecksum:
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| 238 | push es
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[484] | 239 | push dx
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[57] | 240 |
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| 241 | call Buffers_GetFileBufferToESDI
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[484] | 242 | call EEPROM_GetXtideUniversalBiosSizeFromESDItoDXCX
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[592] | 243 | %ifdef CLD_NEEDED
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| 244 | cld
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| 245 | %endif
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[589] | 246 |
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| 247 | ; Compatibility fix for 3Com 3C503 cards where the ASIC returns 8080h as the last two bytes of the ROM.
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| 248 |
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| 249 | ; Assume the BIOS size is not 8K, ie generate a normal checksum.
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| 250 | dec cx
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| 251 | mov ax, 100h
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| 252 | cmp cx, 8192 - 1
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| 253 | jne SHORT .BiosSizeIsNot8K
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| 254 | ; The BIOS size is 8K and therefore a potential candidate for a 3Com 3C503 card.
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[592] | 255 | mov cl, (8192 - 3) & 0FFh
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[589] | 256 | mov ah, 3
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[57] | 257 | ALIGN JUMP_ALIGN
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[589] | 258 | .BiosSizeIsNot8K:
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[57] | 259 | .SumNextByte:
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| 260 | add al, [es:di]
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| 261 | inc di
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| 262 | loop .SumNextByte
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[592] | 263 | .NextChecksumByte:
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[57] | 264 | neg al
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[592] | 265 | stosb
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[589] | 266 | dec ah
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| 267 | jnz SHORT .NextChecksumByte
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[57] | 268 |
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[484] | 269 | pop dx
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[57] | 270 | pop es
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| 271 | ret
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| 272 |
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| 273 |
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| 274 | ;--------------------------------------------------------------------
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[59] | 275 | ; Buffers_GetRomvarsFlagsToAX
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| 276 | ; Parameters:
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| 277 | ; Nothing
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| 278 | ; Returns:
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| 279 | ; AX: ROMVARS.wFlags
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| 280 | ; Corrupts registers:
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| 281 | ; BX
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| 282 | ;--------------------------------------------------------------------
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| 283 | ALIGN JUMP_ALIGN
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| 284 | Buffers_GetRomvarsFlagsToAX:
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| 285 | mov bx, ROMVARS.wFlags
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| 286 | ; Fall to Buffers_GetRomvarsValueToAXfromOffsetInBX
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| 287 |
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| 288 | ;--------------------------------------------------------------------
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[57] | 289 | ; Buffers_GetRomvarsValueToAXfromOffsetInBX
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| 290 | ; Parameters:
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| 291 | ; BX: ROMVARS offset
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| 292 | ; Returns:
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| 293 | ; AX: Value
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| 294 | ; Corrupts registers:
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| 295 | ; Nothing
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| 296 | ;--------------------------------------------------------------------
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| 297 | ALIGN JUMP_ALIGN
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| 298 | Buffers_GetRomvarsValueToAXfromOffsetInBX:
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| 299 | push es
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| 300 | push di
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| 301 | call Buffers_GetFileBufferToESDI
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| 302 | mov ax, [es:bx+di]
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| 303 | pop di
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| 304 | pop es
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| 305 | ret
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| 306 |
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| 307 |
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| 308 | ;--------------------------------------------------------------------
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[204] | 309 | ; Buffers_GetIdeControllerCountToCX
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| 310 | ; Parameters:
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| 311 | ; SS:BP: Menu handle
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| 312 | ; Returns:
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| 313 | ; CX: Number of IDE controllers to configure
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| 314 | ; ES:DI: Ptr to file buffer
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| 315 | ; Corrupts registers:
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[589] | 316 | ; Nothing
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[204] | 317 | ;--------------------------------------------------------------------
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| 318 | ALIGN JUMP_ALIGN
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| 319 | Buffers_GetIdeControllerCountToCX:
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[589] | 320 | xor cx, cx
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[204] | 321 | call Buffers_GetFileBufferToESDI
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[589] | 322 | or cl, [es:di+ROMVARS.bIdeCnt]
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| 323 | jnz SHORT .LimitControllerCountForLiteMode
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| 324 | inc cx ; Make sure there is at least one controller
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[204] | 325 |
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[589] | 326 | .LimitControllerCountForLiteMode:
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[204] | 327 | test BYTE [es:di+ROMVARS.wFlags], FLG_ROMVARS_FULLMODE
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| 328 | jnz SHORT .ReturnControllerCountInCX
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[589] | 329 | MIN_U cl, MAX_LITE_MODE_CONTROLLERS
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[204] | 330 |
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| 331 | .ReturnControllerCountInCX:
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| 332 | ret
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| 333 |
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| 334 |
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| 335 | ;--------------------------------------------------------------------
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[65] | 336 | ; Buffers_GetFlashComparisonBufferToESDI
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[57] | 337 | ; Buffers_GetFileDialogItemBufferToESDI
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[592] | 338 | ; Buffers_GetFileBufferToESDI
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[57] | 339 | ; Parameters:
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| 340 | ; Nothing
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| 341 | ; Returns:
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| 342 | ; ES:DI: Ptr to file buffer
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| 343 | ; Corrupts registers:
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| 344 | ; Nothing
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| 345 | ;--------------------------------------------------------------------
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| 346 | ALIGN JUMP_ALIGN
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[65] | 347 | Buffers_GetFlashComparisonBufferToESDI:
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[57] | 348 | Buffers_GetFileDialogItemBufferToESDI:
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[59] | 349 | call Buffers_GetFileBufferToESDI
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| 350 | mov di, es
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[592] | 351 | SKIP2B f
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[57] | 352 | Buffers_GetFileBufferToESDI:
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| 353 | mov di, cs
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| 354 | add di, 1000h ; Change to next 64k page
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| 355 | mov es, di
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| 356 | xor di, di ; Ptr now in ES:DI
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| 357 | ret
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