[57] | 1 | ; Project name : XTIDE Univeral BIOS Configurator v2 |
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| 2 | ; Description : Functions for managing EEPROM contents. |
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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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[65] | 20 | ; Section containing initialized data |
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| 21 | SECTION .data |
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| 22 | |
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| 23 | ALIGN WORD_ALIGN |
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| 24 | g_rgwEepromTypeToSizeInWords: |
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| 25 | dw (2<<10) / 2 ; EEPROM_TYPE.2816_2kiB |
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| 26 | dw (8<<10) / 2 |
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[159] | 27 | dw (8<<10) / 2 ; EEPROM_TYPE.2864_8kiB_MOD |
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[65] | 28 | dw (32<<10) / 2 |
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| 29 | dw (64<<10) / 2 |
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| 30 | |
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| 31 | g_rgwEepromPageToSizeInBytes: |
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| 32 | dw 1 ; EEPROM_PAGE.1_byte |
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| 33 | dw 2 |
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| 34 | dw 4 |
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| 35 | dw 8 |
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| 36 | dw 16 |
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| 37 | dw 32 |
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| 38 | dw 64 |
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| 39 | |
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| 40 | |
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| 41 | |
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[57] | 42 | ; Section containing code |
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| 43 | SECTION .text |
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| 44 | |
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| 45 | ;-------------------------------------------------------------------- |
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[68] | 46 | ; EEPROM_LoadXtideUniversalBiosFromRomToRamBufferAndReturnSizeInDXCX |
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[57] | 47 | ; Parameters: |
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| 48 | ; Nothing |
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| 49 | ; Returns: |
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[68] | 50 | ; DX:CX: BIOS size in bytes |
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[57] | 51 | ; Corrupts registers: |
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| 52 | ; AX, BX, SI, DI |
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| 53 | ;-------------------------------------------------------------------- |
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| 54 | ALIGN JUMP_ALIGN |
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[68] | 55 | EEPROM_LoadXtideUniversalBiosFromRomToRamBufferAndReturnSizeInDXCX: |
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[57] | 56 | push es |
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| 57 | |
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| 58 | call EEPROM_FindXtideUniversalBiosROMtoESDI |
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[484] | 59 | call EEPROM_GetXtideUniversalBiosSizeFromESDItoDXCX |
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[57] | 60 | xor si, si ; Load from beginning of ROM |
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| 61 | call LoadBytesFromRomToRamBuffer |
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| 62 | |
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[484] | 63 | call EEPROM_GetXtideUniversalBiosSizeFromESDItoDXCX |
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[57] | 64 | pop es |
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| 65 | ret |
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| 66 | |
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[484] | 67 | |
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[57] | 68 | ;-------------------------------------------------------------------- |
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[484] | 69 | ; EEPROM_GetXtideUniversalBiosSizeFromESDItoDXCX |
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[57] | 70 | ; Parameters: |
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[484] | 71 | ; ES:DI: Ptr to XTIDE Universal BIOS |
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[57] | 72 | ; Returns: |
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[68] | 73 | ; DX:CX: Bios size in bytes |
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[57] | 74 | ; Corrupts registers: |
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[68] | 75 | ; Nothing |
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[57] | 76 | ;-------------------------------------------------------------------- |
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| 77 | ALIGN JUMP_ALIGN |
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[484] | 78 | EEPROM_GetXtideUniversalBiosSizeFromESDItoDXCX: |
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[68] | 79 | xor dx, dx |
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[558] | 80 | mov ch, [es:di+ROMVARS.bRomSize] |
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| 81 | mov cl, dl |
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| 82 | eSHL_IM ch, 1 |
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[57] | 83 | ret |
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| 84 | |
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| 85 | |
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| 86 | ;-------------------------------------------------------------------- |
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| 87 | ; EEPROM_LoadOldSettingsFromRomToRamBuffer |
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| 88 | ; Parameters: |
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| 89 | ; Nothing |
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| 90 | ; Returns: |
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| 91 | ; CF: Set if EEPROM was found |
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| 92 | ; Cleared if EEPROM not found |
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| 93 | ; Corrupts registers: |
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| 94 | ; AX, BX, CX, SI, DI |
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| 95 | ;-------------------------------------------------------------------- |
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| 96 | ALIGN JUMP_ALIGN |
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| 97 | EEPROM_LoadOldSettingsFromRomToRamBuffer: |
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| 98 | mov cx, ROMVARS_size - ROMVARS.wFlags ; Number of bytes to load |
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| 99 | mov si, ROMVARS.wFlags ; Offset where to start loading |
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| 100 | ; Fall to LoadBytesFromRomToRamBuffer |
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| 101 | |
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| 102 | ;-------------------------------------------------------------------- |
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| 103 | ; LoadBytesFromRomToRamBuffer |
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| 104 | ; Parameters: |
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| 105 | ; CX: Number of bytes to load from ROM |
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| 106 | ; SI: Offset to first byte to load |
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| 107 | ; Returns: |
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| 108 | ; CF: Set if EEPROM was found |
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| 109 | ; Cleared if EEPROM not found |
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| 110 | ; Corrupts registers: |
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[523] | 111 | ; AX, BX, CX, SI |
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[57] | 112 | ;-------------------------------------------------------------------- |
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| 113 | ALIGN JUMP_ALIGN |
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| 114 | LoadBytesFromRomToRamBuffer: |
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| 115 | push es |
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| 116 | push ds |
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[523] | 117 | push di |
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[57] | 118 | |
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| 119 | call EEPROM_FindXtideUniversalBiosROMtoESDI |
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| 120 | jnc SHORT .XtideUniversalBiosNotFound |
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| 121 | push es |
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| 122 | pop ds ; DS:SI points to ROM |
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| 123 | |
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| 124 | call Buffers_GetFileBufferToESDI |
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| 125 | mov di, si ; ES:DI points to RAM buffer |
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| 126 | |
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| 127 | cld |
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| 128 | call Memory_CopyCXbytesFromDSSItoESDI |
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| 129 | stc |
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| 130 | |
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| 131 | .XtideUniversalBiosNotFound: |
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[523] | 132 | pop di |
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[57] | 133 | pop ds |
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| 134 | pop es |
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| 135 | ret |
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| 136 | |
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| 137 | |
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| 138 | ;-------------------------------------------------------------------- |
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| 139 | ; EEPROM_FindXtideUniversalBiosROMtoESDI |
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| 140 | ; Parameters: |
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| 141 | ; Nothing |
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| 142 | ; Returns: |
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| 143 | ; ES:DI: EEPROM segment |
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| 144 | ; CF: Set if EEPROM was found |
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| 145 | ; Cleared if EEPROM not found |
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| 146 | ; Corrupts registers: |
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| 147 | ; AX, BX |
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| 148 | ;-------------------------------------------------------------------- |
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| 149 | ALIGN JUMP_ALIGN |
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| 150 | EEPROM_FindXtideUniversalBiosROMtoESDI: |
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| 151 | push si |
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| 152 | push cx |
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| 153 | |
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| 154 | xor di, di ; Zero DI (offset) |
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| 155 | mov bx, 0C000h ; First possible ROM segment |
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| 156 | ALIGN JUMP_ALIGN |
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| 157 | .SegmentLoop: |
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| 158 | mov es, bx ; Possible ROM segment to ES |
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| 159 | call Buffers_IsXtideUniversalBiosSignatureInESDI |
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| 160 | je SHORT .RomFound |
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[181] | 161 | add bh, 2 ; Increment by 8kB |
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[57] | 162 | jnc SHORT .SegmentLoop ; Loop until segment overflows |
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| 163 | clc |
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| 164 | jmp SHORT .ReturnWithoutUpdatingCF |
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| 165 | ALIGN JUMP_ALIGN |
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| 166 | .RomFound: |
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| 167 | stc |
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| 168 | .ReturnWithoutUpdatingCF: |
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| 169 | pop cx |
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| 170 | pop si |
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| 171 | ret |
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| 172 | |
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| 173 | |
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| 174 | ;-------------------------------------------------------------------- |
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[65] | 175 | ; EEPROM_LoadFromRomToRamComparisonBuffer |
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[57] | 176 | ; Parameters: |
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| 177 | ; Nothing |
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| 178 | ; Returns: |
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[65] | 179 | ; Nothing |
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[57] | 180 | ; Corrupts registers: |
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[65] | 181 | ; BX, CX, SI, DI |
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[57] | 182 | ;-------------------------------------------------------------------- |
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| 183 | ALIGN JUMP_ALIGN |
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[65] | 184 | EEPROM_LoadFromRomToRamComparisonBuffer: |
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| 185 | push es |
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| 186 | push ds |
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| 187 | |
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| 188 | mov ds, [cs:g_cfgVars+CFGVARS.wEepromSegment] |
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| 189 | xor si, si |
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| 190 | call Buffers_GetFlashComparisonBufferToESDI |
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[293] | 191 | eMOVZX bx, [cs:g_cfgVars+CFGVARS.bEepromType] |
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[65] | 192 | mov cx, [cs:bx+g_rgwEepromTypeToSizeInWords] |
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| 193 | cld |
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| 194 | rep movsw |
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| 195 | |
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| 196 | pop ds |
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| 197 | pop es |
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[57] | 198 | ret |
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