1 | ; Project name : XTIDE Universal BIOS Configurator v2 |
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2 | ; Description : "Master/Slave Drive" menu structs and functions. |
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3 | |
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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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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_MenupageForMasterSlaveMenu: |
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25 | istruc MENUPAGE |
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26 | at MENUPAGE.fnEnter, dw MasterSlaveMenu_EnterMenuOrModifyItemVisibility |
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27 | at MENUPAGE.fnBack, dw IdeControllerMenu_EnterMenuOrModifyItemVisibility |
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28 | at MENUPAGE.wMenuitems, dw 9 |
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29 | iend |
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30 | |
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31 | g_MenuitemMasterSlaveBackToIdeControllerMenu: |
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32 | istruc MENUITEM |
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33 | at MENUITEM.fnActivate, dw IdeControllerMenu_EnterMenuOrModifyItemVisibility |
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34 | at MENUITEM.szName, dw g_szItemDrvBackToIde |
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35 | at MENUITEM.szQuickInfo, dw g_szItemDrvBackToIde |
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36 | at MENUITEM.szHelp, dw g_szItemDrvBackToIde |
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37 | at MENUITEM.bFlags, db FLG_MENUITEM_VISIBLE |
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38 | at MENUITEM.bType, db TYPE_MENUITEM_PAGEBACK |
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39 | iend |
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40 | |
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41 | g_MenuitemMasterSlaveBlockModeTransfers: |
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42 | istruc MENUITEM |
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43 | at MENUITEM.fnActivate, dw Menuitem_ActivateMultichoiceSelectionForMenuitemInDSSI |
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44 | at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteLookupValueStringToBufferInESDIfromShiftedItemInDSSI |
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45 | at MENUITEM.szName, dw g_szItemDrvBlockMode |
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46 | at MENUITEM.szQuickInfo, dw g_szNfoDrvBlockMode |
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47 | at MENUITEM.szHelp, dw g_szHelpDrvBlockMode |
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48 | at MENUITEM.bFlags, db FLG_MENUITEM_VISIBLE | FLG_MENUITEM_FLAGVALUE |
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49 | at MENUITEM.bType, db TYPE_MENUITEM_MULTICHOICE |
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50 | at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL |
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51 | at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvBlockMode |
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52 | at MENUITEM.itemValue + ITEM_VALUE.szMultichoice, dw g_szMultichoiceBooleanFlag |
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53 | at MENUITEM.itemValue + ITEM_VALUE.rgszValueToStringLookup, dw g_rgszValueToStringLookupForFlagBooleans |
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54 | at MENUITEM.itemValue + ITEM_VALUE.wValueBitmask, dw FLG_DRVPARAMS_BLOCKMODE |
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55 | iend |
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56 | |
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57 | g_MenuitemMasterSlaveWriteCache: |
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58 | istruc MENUITEM |
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59 | at MENUITEM.fnActivate, dw Menuitem_ActivateMultichoiceSelectionForMenuitemInDSSI |
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60 | at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteLookupValueStringToBufferInESDIfromUnshiftedItemInDSSI |
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61 | at MENUITEM.szName, dw g_szItemDrvWriteCache |
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62 | at MENUITEM.szQuickInfo, dw g_szNfoDrvWriteCache |
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63 | at MENUITEM.szHelp, dw g_szHelpDrvWriteCache |
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64 | at MENUITEM.bFlags, db FLG_MENUITEM_VISIBLE | FLG_MENUITEM_MASKVALUE |
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65 | at MENUITEM.bType, db TYPE_MENUITEM_MULTICHOICE |
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66 | at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL |
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67 | at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvWriteCache |
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68 | at MENUITEM.itemValue + ITEM_VALUE.szMultichoice, dw g_szMultichoiseWrCache |
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69 | at MENUITEM.itemValue + ITEM_VALUE.rgwChoiceToValueLookup, dw g_rgwChoiceToValueLookupForWriteCache |
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70 | at MENUITEM.itemValue + ITEM_VALUE.rgszChoiceToStringLookup, dw g_rgszChoiceToStringLookupForWriteCache |
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71 | at MENUITEM.itemValue + ITEM_VALUE.wValueBitmask, dw MASK_DRVPARAMS_WRITECACHE |
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72 | iend |
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73 | |
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74 | g_MenuitemMasterSlaveUserCHS: |
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75 | istruc MENUITEM |
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76 | at MENUITEM.fnActivate, dw Menuitem_ActivateMultichoiceSelectionForMenuitemInDSSI |
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77 | at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteLookupValueStringToBufferInESDIfromShiftedItemInDSSI |
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78 | at MENUITEM.szName, dw g_szItemDrvUserCHS |
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79 | at MENUITEM.szQuickInfo, dw g_szNfoDrvUserCHS |
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80 | at MENUITEM.szHelp, dw g_szHelpDrvUserCHS |
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81 | at MENUITEM.bFlags, db FLG_MENUITEM_VISIBLE | FLG_MENUITEM_MODIFY_MENU | FLG_MENUITEM_FLAGVALUE |
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82 | at MENUITEM.bType, db TYPE_MENUITEM_MULTICHOICE |
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83 | at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL |
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84 | at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvUserCHS |
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85 | at MENUITEM.itemValue + ITEM_VALUE.szMultichoice, dw g_szMultichoiceBooleanFlag |
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86 | at MENUITEM.itemValue + ITEM_VALUE.rgszValueToStringLookup, dw g_rgszValueToStringLookupForFlagBooleans |
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87 | at MENUITEM.itemValue + ITEM_VALUE.wValueBitmask, dw FLG_DRVPARAMS_USERCHS |
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88 | at MENUITEM.itemValue + ITEM_VALUE.fnValueWriter, dw MasterSlaveMenu_WriteCHSFlag |
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89 | iend |
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90 | |
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91 | g_MenuitemMasterSlaveCylinders: |
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92 | istruc MENUITEM |
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93 | at MENUITEM.fnActivate, dw Menuitem_ActivateUnsignedInputForMenuitemInDSSI |
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94 | at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteUnsignedValueStringToBufferInESDIfromItemInDSSI |
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95 | at MENUITEM.szName, dw g_szItemDrvCyls |
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96 | at MENUITEM.szQuickInfo, dw g_szNfoDrvCyls |
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97 | at MENUITEM.szHelp, dw g_szNfoDrvCyls |
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98 | at MENUITEM.bFlags, db NULL |
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99 | at MENUITEM.bType, db TYPE_MENUITEM_UNSIGNED |
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100 | at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL |
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101 | at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvCyls |
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102 | at MENUITEM.itemValue + ITEM_VALUE.wMinValue, dw 1 |
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103 | at MENUITEM.itemValue + ITEM_VALUE.wMaxValue, dw 16383 |
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104 | %define MASTERSLAVE_CYLINDERS_DEFAULT 65 |
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105 | iend |
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106 | |
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107 | g_MenuitemMasterSlaveHeads: |
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108 | istruc MENUITEM |
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109 | at MENUITEM.fnActivate, dw Menuitem_ActivateUnsignedInputForMenuitemInDSSI |
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110 | at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteUnsignedValueStringToBufferInESDIfromItemInDSSI |
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111 | at MENUITEM.szName, dw g_szItemDrvHeads |
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112 | at MENUITEM.szQuickInfo, dw g_szNfoDrvHeads |
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113 | at MENUITEM.szHelp, dw g_szNfoDrvHeads |
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114 | at MENUITEM.bFlags, db FLG_MENUITEM_BYTEVALUE |
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115 | at MENUITEM.bType, db TYPE_MENUITEM_UNSIGNED |
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116 | at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL |
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117 | at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvHeads |
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118 | at MENUITEM.itemValue + ITEM_VALUE.wMinValue, dw 1 |
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119 | at MENUITEM.itemValue + ITEM_VALUE.wMaxValue, dw 16 |
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120 | %define MASTERSLAVE_HEADS_DEFAULT 16 |
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121 | iend |
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122 | |
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123 | g_MenuitemMasterSlaveSectors: |
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124 | istruc MENUITEM |
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125 | at MENUITEM.fnActivate, dw Menuitem_ActivateUnsignedInputForMenuitemInDSSI |
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126 | at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteUnsignedValueStringToBufferInESDIfromItemInDSSI |
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127 | at MENUITEM.szName, dw g_szItemDrvSect |
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128 | at MENUITEM.szQuickInfo, dw g_szNfoDrvSect |
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129 | at MENUITEM.szHelp, dw g_szNfoDrvSect |
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130 | at MENUITEM.bFlags, db FLG_MENUITEM_BYTEVALUE |
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131 | at MENUITEM.bType, db TYPE_MENUITEM_UNSIGNED |
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132 | at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL |
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133 | at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvSect |
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134 | at MENUITEM.itemValue + ITEM_VALUE.wMinValue, dw 1 |
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135 | at MENUITEM.itemValue + ITEM_VALUE.wMaxValue, dw 63 |
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136 | %define MASTERSLAVE_SECTORS_DEFAULT 63 |
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137 | iend |
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138 | |
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139 | g_MenuitemMasterSlaveUserLBA: |
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140 | istruc MENUITEM |
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141 | at MENUITEM.fnActivate, dw Menuitem_ActivateMultichoiceSelectionForMenuitemInDSSI |
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142 | at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteLookupValueStringToBufferInESDIfromShiftedItemInDSSI |
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143 | at MENUITEM.szName, dw g_szItemDrvUserLBA |
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144 | at MENUITEM.szQuickInfo, dw g_szNfoDrvUserLBA |
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145 | at MENUITEM.szHelp, dw g_szHelpDrvUserLBA |
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146 | at MENUITEM.bFlags, db FLG_MENUITEM_VISIBLE | FLG_MENUITEM_MODIFY_MENU | FLG_MENUITEM_FLAGVALUE |
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147 | at MENUITEM.bType, db TYPE_MENUITEM_MULTICHOICE |
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148 | at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL |
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149 | at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvUserLBA |
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150 | at MENUITEM.itemValue + ITEM_VALUE.szMultichoice, dw g_szMultichoiceBooleanFlag |
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151 | at MENUITEM.itemValue + ITEM_VALUE.rgszValueToStringLookup, dw g_rgszValueToStringLookupForFlagBooleans |
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152 | at MENUITEM.itemValue + ITEM_VALUE.wValueBitmask, dw FLG_DRVPARAMS_USERLBA |
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153 | at MENUITEM.itemValue + ITEM_VALUE.fnValueWriter, dw MasterSlaveMenu_WriteLBAFlag |
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154 | iend |
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155 | |
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156 | g_MenuitemMasterSlaveUserLbaValue: |
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157 | istruc MENUITEM |
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158 | at MENUITEM.fnActivate, dw Menuitem_ActivateUnsignedInputForMenuitemInDSSI |
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159 | at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteUnsignedValueStringToBufferInESDIfromItemInDSSI |
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160 | at MENUITEM.szName, dw g_szItemDrvLbaSectors |
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161 | at MENUITEM.szQuickInfo, dw g_szNfoDrvLbaSectors |
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162 | at MENUITEM.szHelp, dw g_szNfoDrvLbaSectors |
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163 | at MENUITEM.bFlags, db NULL |
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164 | at MENUITEM.bType, db TYPE_MENUITEM_UNSIGNED |
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165 | at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL |
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166 | at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvLbaSectors |
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167 | at MENUITEM.itemValue + ITEM_VALUE.wMinValue, dw 1 ; 512 MiB |
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168 | at MENUITEM.itemValue + ITEM_VALUE.wMaxValue, dw 10000000h / (1024 * 1024) ; Limit to 28-bit LBA |
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169 | at MENUITEM.itemValue + ITEM_VALUE.fnValueReader, dw ValueReaderForUserLbaValue |
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170 | at MENUITEM.itemValue + ITEM_VALUE.fnValueWriter, dw ValueWriterForUserLbaValue |
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171 | %define MASTERSLAVE_USERLBA_DEFAULT 1 |
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172 | iend |
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173 | |
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174 | |
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175 | g_rgwChoiceToValueLookupForWriteCache: |
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176 | dw DEFAULT_WRITE_CACHE |
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177 | dw DISABLE_WRITE_CACHE |
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178 | dw ENABLE_WRITE_CACHE |
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179 | |
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180 | g_rgszChoiceToStringLookupForWriteCache: |
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181 | dw g_szValueBootDispModeDefault |
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182 | dw g_szValueDrvWrCaDis |
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183 | dw g_szValueDrvWrCaEn |
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184 | |
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185 | |
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186 | ; Section containing code |
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187 | SECTION .text |
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188 | |
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189 | ;-------------------------------------------------------------------- |
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190 | ; MasterSlaveMenu_InitializeToDrvparamsOffsetInBX |
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191 | ; Parameters: |
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192 | ; SS:BP: Menu handle |
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193 | ; Returns: |
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194 | ; Nothing |
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195 | ; Corrupts registers: |
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196 | ; AX |
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197 | ;-------------------------------------------------------------------- |
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198 | ALIGN JUMP_ALIGN |
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199 | MasterSlaveMenu_InitializeToDrvparamsOffsetInBX: |
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200 | lea ax, [bx+DRVPARAMS.wFlags] |
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201 | mov [cs:g_MenuitemMasterSlaveBlockModeTransfers+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax |
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202 | mov [cs:g_MenuitemMasterSlaveWriteCache+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax |
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203 | mov [cs:g_MenuitemMasterSlaveUserCHS+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax |
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204 | mov [cs:g_MenuitemMasterSlaveUserLBA+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax |
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205 | |
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206 | lea ax, [bx+DRVPARAMS.wCylinders] |
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207 | mov [cs:g_MenuitemMasterSlaveCylinders+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax |
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208 | |
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209 | lea ax, [bx+DRVPARAMS.bHeads] |
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210 | mov [cs:g_MenuitemMasterSlaveHeads+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax |
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211 | |
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212 | lea ax, [bx+DRVPARAMS.bSect] |
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213 | mov [cs:g_MenuitemMasterSlaveSectors+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax |
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214 | |
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215 | lea ax, [bx+DRVPARAMS.dwMaximumLBA] |
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216 | mov [cs:g_MenuitemMasterSlaveUserLbaValue+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax |
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217 | ret |
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218 | |
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219 | |
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220 | ;-------------------------------------------------------------------- |
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221 | ; MasterSlaveMenu_EnterMenuOrModifyItemVisibility |
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222 | ; Parameters: |
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223 | ; SS:BP: Menu handle |
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224 | ; Returns: |
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225 | ; Nothing |
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226 | ; Corrupts registers: |
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227 | ; All, except BP |
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228 | ;-------------------------------------------------------------------- |
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229 | ALIGN JUMP_ALIGN |
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230 | MasterSlaveMenu_EnterMenuOrModifyItemVisibility: |
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231 | push cs |
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232 | pop ds |
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233 | call .EnableOrDisableUserCHSandLBA |
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234 | call .EnableOrDisableCHandS |
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235 | call .EnableOrDisableUserLbaValue |
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236 | mov si, g_MenupageForMasterSlaveMenu |
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237 | jmp Menupage_ChangeToNewMenupageInDSSI |
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238 | |
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239 | |
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240 | ;-------------------------------------------------------------------- |
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241 | ; .EnableOrDisableUserCHSandLBA |
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242 | ; Parameters: |
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243 | ; SS:BP: Menu handle |
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244 | ; Returns: |
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245 | ; Nothing |
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246 | ; Corrupts registers: |
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247 | ; AX, BX |
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248 | ;-------------------------------------------------------------------- |
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249 | ALIGN JUMP_ALIGN |
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250 | .EnableOrDisableUserCHSandLBA: |
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251 | mov bx, [g_MenuitemMasterSlaveUserLBA+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset] |
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252 | call Buffers_GetRomvarsValueToAXfromOffsetInBX |
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253 | test ax, FLG_DRVPARAMS_USERLBA |
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254 | jnz SHORT .DisableCHSandEnableLBA |
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255 | test ax, FLG_DRVPARAMS_USERCHS |
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256 | jnz SHORT .EnableCHSandDisableLBA |
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257 | |
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258 | ; Enable both |
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259 | mov bx, g_MenuitemMasterSlaveUserCHS |
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260 | call .EnableMenuitemFromCSBX |
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261 | mov bx, g_MenuitemMasterSlaveUserLBA |
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262 | jmp .EnableMenuitemFromCSBX |
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263 | |
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264 | ALIGN JUMP_ALIGN |
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265 | .EnableCHSandDisableLBA: |
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266 | mov bx, g_MenuitemMasterSlaveUserCHS |
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267 | call .EnableMenuitemFromCSBX |
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268 | mov bx, g_MenuitemMasterSlaveUserLBA |
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269 | jmp .DisableMenuitemFromCSBX |
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270 | |
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271 | ALIGN JUMP_ALIGN |
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272 | .DisableCHSandEnableLBA: |
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273 | mov bx, g_MenuitemMasterSlaveUserLBA |
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274 | call .EnableMenuitemFromCSBX |
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275 | mov bx, g_MenuitemMasterSlaveUserCHS |
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276 | jmp .DisableMenuitemFromCSBX |
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277 | |
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278 | |
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279 | ;-------------------------------------------------------------------- |
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280 | ; .EnableOrDisableCHandS |
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281 | ; Parameters: |
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282 | ; SS:BP: Menu handle |
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283 | ; Returns: |
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284 | ; Nothing |
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285 | ; Corrupts registers: |
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286 | ; AX, BX |
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287 | ;-------------------------------------------------------------------- |
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288 | ALIGN JUMP_ALIGN |
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289 | .EnableOrDisableCHandS: |
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290 | mov bx, [cs:g_MenuitemMasterSlaveUserCHS+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset] |
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291 | call Buffers_GetRomvarsValueToAXfromOffsetInBX |
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292 | test ax, FLG_DRVPARAMS_USERCHS |
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293 | jz SHORT .DisableCHandS |
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294 | test ax, FLG_DRVPARAMS_USERLBA |
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295 | jnz SHORT .DisableCHandS |
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296 | |
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297 | mov bx, g_MenuitemMasterSlaveCylinders |
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298 | call .EnableMenuitemFromCSBX |
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299 | mov bx, g_MenuitemMasterSlaveHeads |
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300 | call .EnableMenuitemFromCSBX |
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301 | mov bx, g_MenuitemMasterSlaveSectors |
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302 | jmp SHORT .EnableMenuitemFromCSBX |
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303 | |
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304 | ALIGN JUMP_ALIGN |
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305 | .DisableCHandS: |
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306 | mov bx, g_MenuitemMasterSlaveCylinders |
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307 | call .DisableMenuitemFromCSBX |
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308 | mov bx, g_MenuitemMasterSlaveHeads |
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309 | call .DisableMenuitemFromCSBX |
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310 | mov bx, g_MenuitemMasterSlaveSectors |
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311 | jmp SHORT .DisableMenuitemFromCSBX |
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312 | |
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313 | |
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314 | ;-------------------------------------------------------------------- |
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315 | ; .EnableOrDisableUserLbaValue |
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316 | ; Parameters: |
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317 | ; SS:BP: Menu handle |
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318 | ; Returns: |
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319 | ; Nothing |
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320 | ; Corrupts registers: |
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321 | ; AX, BX |
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322 | ;-------------------------------------------------------------------- |
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323 | ALIGN JUMP_ALIGN |
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324 | .EnableOrDisableUserLbaValue: |
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325 | mov bx, [cs:g_MenuitemMasterSlaveUserLBA+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset] |
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326 | call Buffers_GetRomvarsValueToAXfromOffsetInBX |
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327 | mov bx, g_MenuitemMasterSlaveUserLbaValue |
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328 | test ax, FLG_DRVPARAMS_USERCHS |
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329 | jnz SHORT .DisableMenuitemFromCSBX |
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330 | test ax, FLG_DRVPARAMS_USERLBA |
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331 | jz SHORT .DisableMenuitemFromCSBX |
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332 | ; Fall to .EnableMenuitemFromCSBX |
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333 | |
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334 | |
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335 | ;-------------------------------------------------------------------- |
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336 | ; .EnableMenuitemFromCSBX |
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337 | ; .DisableMenuitemFromCSBX |
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338 | ; Parameters: |
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339 | ; CS:BX: Ptr to MENUITEM |
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340 | ; Returns: |
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341 | ; Nothing |
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342 | ; Corrupts registers: |
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343 | ; Nothing |
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344 | ;-------------------------------------------------------------------- |
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345 | ALIGN JUMP_ALIGN |
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346 | .EnableMenuitemFromCSBX: |
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347 | or BYTE [cs:bx+MENUITEM.bFlags], FLG_MENUITEM_VISIBLE |
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348 | ret |
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349 | |
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350 | ALIGN JUMP_ALIGN |
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351 | .DisableMenuitemFromCSBX: |
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352 | and BYTE [cs:bx+MENUITEM.bFlags], ~FLG_MENUITEM_VISIBLE |
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353 | ret |
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354 | |
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355 | |
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356 | ;-------------------------------------------------------------------- |
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357 | ; MENUITEM value reader functions |
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358 | ; Parameters: |
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359 | ; AX: Value from MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset |
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360 | ; DS:SI: Ptr to MENUITEM |
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361 | ; ES:DI: Ptr to value variable |
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362 | ; Returns: |
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363 | ; AX: Value with possible modifications |
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364 | ; Corrupts registers: |
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365 | ; Nothing |
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366 | ;-------------------------------------------------------------------- |
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367 | ALIGN JUMP_ALIGN |
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368 | ValueReaderForUserLbaValue: |
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369 | push dx |
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370 | |
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371 | mov ax, [es:di] |
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372 | mov dx, [es:di+2] ; DX:AX now holds user defined LBA28 limit |
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373 | add ax, BYTE 1 ; Increment by one |
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374 | adc dx, BYTE 0 |
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375 | |
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376 | xchg ax, dx ; SHR 16 |
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377 | eSHIFT_IM ax, 4, shr ; SHR 4 => AX = DX:AX / (1024*1024) |
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378 | |
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379 | pop dx |
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380 | ret |
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381 | |
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382 | |
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383 | ;-------------------------------------------------------------------- |
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384 | ; MENUITEM value writer functions |
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385 | ; Parameters: |
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386 | ; AX: Value to be written to MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset |
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387 | ; DS:SI: Ptr to MENUITEM |
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388 | ; ES:DI: Ptr to value variable |
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389 | ; Returns: |
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390 | ; AX: Value to be stored |
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391 | ; Corrupts registers: |
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392 | ; Nothing |
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393 | ;-------------------------------------------------------------------- |
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394 | ALIGN JUMP_ALIGN |
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395 | ValueWriterForUserLbaValue: |
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396 | push dx |
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397 | |
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398 | xor dx, dx |
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399 | eSHIFT_IM ax, 4, shl |
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400 | xchg dx, ax ; DX:AX now holds AX * 1024 * 1024 |
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401 | |
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402 | sub ax, BYTE 1 ; Decrement DX:AX by one |
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403 | sbb dx, BYTE 0 ; (necessary since maximum LBA28 sector count is 0FFF FFFFh) |
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404 | |
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405 | mov [es:di+2], dx ; Store DX by ourselves |
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406 | pop dx |
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407 | ret ; AX will be stored by our menu system |
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408 | |
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409 | ; |
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410 | ; No change to CHS flag, but we use this opportunity to change defaults stored in the CHS values if we are |
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411 | ; changing in/out of user CHS settings (since we use these bytes in different ways with the LBA setting). |
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412 | ; |
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413 | ALIGN JUMP_ALIGN |
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414 | MasterSlaveMenu_WriteCHSFlag: |
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415 | test word [es:di], FLG_DRVPARAMS_USERCHS |
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416 | jnz .alreadySet |
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417 | |
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418 | push ax |
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419 | push di |
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420 | push si |
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421 | |
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422 | mov ax, MASTERSLAVE_CYLINDERS_DEFAULT |
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423 | mov si, g_MenuitemMasterSlaveCylinders |
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424 | call Menuitem_StoreValueFromAXtoMenuitemInDSSI |
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425 | |
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426 | mov ax, MASTERSLAVE_HEADS_DEFAULT |
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427 | mov si, g_MenuitemMasterSlaveHeads |
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428 | call Menuitem_StoreValueFromAXtoMenuitemInDSSI |
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429 | |
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430 | mov ax, MASTERSLAVE_SECTORS_DEFAULT |
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431 | mov si, g_MenuitemMasterSlaveSectors |
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432 | call Menuitem_StoreValueFromAXtoMenuitemInDSSI |
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433 | |
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434 | pop si |
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435 | pop di |
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436 | pop ax |
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437 | |
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438 | .alreadySet: |
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439 | ret |
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440 | |
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441 | ; |
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442 | ; No change to LBA flag, but we use this opportunity to change defaults stored in the LBA value if we are |
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443 | ; changing in/out of user LBA settings (since we use these bytes in different ways with the CHS setting). |
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444 | ; |
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445 | ALIGN JUMP_ALIGN |
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446 | MasterSlaveMenu_WriteLBAFlag: |
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447 | test word [es:di], FLG_DRVPARAMS_USERLBA |
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448 | jnz .alreadySet |
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449 | |
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450 | push ax |
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451 | push di |
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452 | push si |
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453 | |
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454 | mov ax, MASTERSLAVE_USERLBA_DEFAULT |
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455 | mov si, g_MenuitemMasterSlaveUserLbaValue |
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456 | call Menuitem_StoreValueFromAXtoMenuitemInDSSI |
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457 | |
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458 | pop si |
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459 | pop di |
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460 | pop ax |
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461 | |
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462 | .alreadySet: |
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463 | ret |
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