1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Boot Menu event handler for menu library callbacks. |
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3 | |
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4 | ; Section containing code |
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5 | SECTION .text |
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6 | |
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7 | ;-------------------------------------------------------------------- |
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8 | ; BootMenuEvent_Handler |
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9 | ; Common parameters for all events: |
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10 | ; BX: Menu event (anything from MENUEVENT struct) |
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11 | ; SS:BP: Menu library handle |
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12 | ; Common return values for all events: |
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13 | ; CF: Set if event processed |
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14 | ; Cleared if event not processed |
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15 | ; Corrupts registers: |
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16 | ; All |
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17 | ;-------------------------------------------------------------------- |
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18 | ALIGN JUMP_ALIGN |
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19 | BootMenuEvent_Handler: |
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20 | |
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21 | %ifdef MENUEVENT_INLINE_OFFSETS |
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22 | |
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23 | add bx, BootMenuEvent_Handler |
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24 | jmp bx |
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25 | |
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26 | MENUEVENT_InitializeMenuinitFromDSSI equ (BootMenuEvent_Handler.InitializeMenuinitFromDSSI - BootMenuEvent_Handler) |
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27 | MENUEVENT_ExitMenu equ (BootMenuEvent_Handler.EventCompleted - BootMenuEvent_Handler) |
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28 | MENUEVENT_ItemHighlightedFromCX equ (BootMenuEvent_Handler.ItemHighlightedFromCX - BootMenuEvent_Handler) |
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29 | MENUEVENT_ItemSelectedFromCX equ (BootMenuEvent_Handler.ItemSelectedFromCX - BootMenuEvent_Handler) |
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30 | MENUEVENT_KeyStrokeInAX equ (BootMenuEvent_Handler.KeyStrokeInAX - BootMenuEvent_Handler) |
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31 | MENUEVENT_RefreshTitle equ (BootMenuPrint_TitleStrings - BootMenuEvent_Handler) |
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32 | MENUEVENT_RefreshInformation equ (BootMenuEvent_Handler.RefreshInformation - BootMenuEvent_Handler) |
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33 | MENUEVENT_RefreshItemFromCX equ (BootMenuEvent_Handler.RefreshItemFromCX - BootMenuEvent_Handler) |
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34 | ; |
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35 | ; Note that there is no entry for MENUEVENT_IdleProcessing. If MENUEVENT_IDLEPROCESSING_ENABLE is not %defined, |
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36 | ; then the entry point will not be called (saving memory on this end and at the CALL point). |
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37 | ; |
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38 | |
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39 | %else |
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40 | |
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41 | cmp bx, BYTE MENUEVENT.RefreshItemFromCX ; Above last supported item? |
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42 | ja SHORT .EventNotHandled |
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43 | jmp [cs:bx+.rgfnEventSpecificHandlers] |
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44 | |
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45 | .EventNotHandled: |
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46 | clc |
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47 | ret |
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48 | |
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49 | ALIGN WORD_ALIGN |
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50 | .rgfnEventSpecificHandlers: |
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51 | dw .InitializeMenuinitFromDSSI ; MENUEVENT.InitializeMenuinitFromDSSI |
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52 | dw .EventCompleted ; MENUEVENT.ExitMenu |
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53 | dw .EventNotHandled ; MENUEVENT.IdleProcessing |
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54 | dw .ItemHighlightedFromCX ; MENUEVENT.ItemHighlightedFromCX |
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55 | dw .ItemSelectedFromCX ; MENUEVENT.ItemSelectedFromCX |
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56 | dw .KeyStrokeInAX ; MENUEVENT.KeyStrokeInAX |
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57 | dw BootMenuPrint_TitleStrings ; MENUEVENT.RefreshTitle |
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58 | dw .RefreshInformation ; MENUEVENT.RefreshInformation |
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59 | dw .RefreshItemFromCX ; MENUEVENT.RefreshItemFromCX |
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60 | |
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61 | %endif |
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62 | |
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63 | |
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64 | ; Parameters: |
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65 | ; DS:SI: Ptr to MENUINIT struct to initialize |
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66 | ; Returns: |
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67 | ; DS:SI: Ptr to initialized MENUINIT struct |
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68 | ALIGN JUMP_ALIGN |
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69 | .InitializeMenuinitFromDSSI: |
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70 | push ds |
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71 | call RamVars_GetSegmentToDS |
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72 | call .GetDefaultMenuitemToDX |
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73 | call BootMenu_GetMenuitemCountToAX |
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74 | pop ds |
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75 | mov [si+MENUINIT.wItems], ax |
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76 | mov [si+MENUINIT.wHighlightedItem], dx |
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77 | mov WORD [si+MENUINIT.wTitleAndInfoLines], BOOT_MENU_TITLE_AND_INFO_LINES |
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78 | mov BYTE [si+MENUINIT.bWidth], BOOT_MENU_WIDTH |
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79 | call BootMenu_GetHeightToAHwithItemCountInAL |
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80 | mov [si+MENUINIT.bHeight], ah |
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81 | mov ax, [cs:ROMVARS.wBootTimeout] |
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82 | CALL_MENU_LIBRARY StartSelectionTimeoutWithTicksInAX |
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83 | stc |
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84 | ret |
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85 | |
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86 | ALIGN JUMP_ALIGN |
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87 | .GetDefaultMenuitemToDX: |
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88 | mov dl, [cs:ROMVARS.bBootDrv] ; Default boot drive |
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89 | call BootMenu_IsDriveInSystem |
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90 | jnc SHORT .DoNotSetDefaultMenuitem |
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91 | call DriveXlate_SetDriveToSwap |
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92 | jmp BootMenu_GetMenuitemToDXforDriveInDL |
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93 | ALIGN JUMP_ALIGN |
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94 | .DoNotSetDefaultMenuitem: |
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95 | xor dx, dx ; Whatever appears first on boot menu |
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96 | ret |
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97 | |
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98 | |
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99 | ; Parameters: |
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100 | ; CX: Index of new highlighted item |
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101 | ; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED |
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102 | ALIGN JUMP_ALIGN |
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103 | .ItemHighlightedFromCX: |
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104 | push cx |
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105 | call RamVars_GetSegmentToDS |
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106 | call DriveXlate_Reset |
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107 | call BootMenu_GetDriveToDXforMenuitemInCX |
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108 | call DriveXlate_SetDriveToSwap |
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109 | |
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110 | xor ax, ax ; Update first floppy drive (for translated drive number) |
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111 | CALL_MENU_LIBRARY RefreshItemFromAX |
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112 | mov dl, 80h |
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113 | call BootMenu_GetMenuitemToDXforDriveInDL |
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114 | xchg ax, dx ; Update first hard disk (for translated drive number) |
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115 | CALL_MENU_LIBRARY RefreshItemFromAX |
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116 | pop ax ; Update new item (for translated drive number) |
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117 | CALL_MENU_LIBRARY RefreshItemFromAX |
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118 | CALL_MENU_LIBRARY RefreshInformation |
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119 | stc |
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120 | ret |
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121 | |
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122 | |
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123 | ; Parameters: |
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124 | ; AL: ASCII character for the key |
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125 | ; AH: Keyboard library scan code for the key |
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126 | ALIGN JUMP_ALIGN |
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127 | .KeyStrokeInAX: |
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128 | cmp ah, ROM_BOOT_HOTKEY_SCANCODE |
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129 | jne SHORT .CheckDriveHotkeys |
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130 | jmp Int19hMenu_RomBoot |
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131 | ALIGN JUMP_ALIGN |
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132 | .CheckDriveHotkeys: |
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133 | call BootMenu_GetMenuitemToAXforAsciiHotkeyInAL |
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134 | cmp ax, [bp+MENUINIT.wItems] |
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135 | jae SHORT .EventCompleted ; Invalid key |
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136 | CALL_MENU_LIBRARY HighlightItemFromAX |
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137 | ; Fall to .ItemSelectedFromCX |
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138 | |
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139 | |
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140 | ; Parameters: |
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141 | ; CX: Index of selected item |
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142 | ALIGN JUMP_ALIGN |
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143 | .ItemSelectedFromCX: |
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144 | CALL_MENU_LIBRARY Close |
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145 | .EventCompleted: |
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146 | stc |
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147 | ret |
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148 | |
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149 | |
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150 | ; Parameters: |
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151 | ; CX: Index of item to refresh |
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152 | ; Cursor has been positioned to the beginning of item line |
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153 | ALIGN JUMP_ALIGN |
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154 | .RefreshItemFromCX: |
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155 | mov bl,00h ; will result in SF being clear in .RefreshItemOrInformation... |
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156 | SKIP2B dx ; dx corrupted below by BootMenu_GetDriveToDXforMenuitemInCX |
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157 | ; Fall to .RefreshInformation |
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158 | |
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159 | ; Parameters: |
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160 | ; CX: Index of highlighted item |
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161 | ; Cursor has been positioned to the beginning of first line |
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162 | ; NO ALIGN - in the shadow of SKIP2B |
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163 | .RefreshInformation: |
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164 | mov bl,040h ; will result in SF being set in .RefreshItemOrInformation... |
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165 | ; Fall to .RefreshItemOrInformationWithJumpTableInCSBX |
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166 | |
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167 | ;-------------------------------------------------------------------- |
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168 | ; RefreshItemOrInformationWithJumpTableInCSBX |
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169 | ; Parameters: |
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170 | ; CX: Index of selected menuitem |
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171 | ; CS:BX: Ptr to ITEM_TYPE_REFRESH jump table |
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172 | ; Returns: |
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173 | ; CF: set since event processed |
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174 | ;-------------------------------------------------------------------- |
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175 | .RefreshItemOrInformationWithJumpTableInCSBX: |
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176 | cmp cl, NO_ITEM_HIGHLIGHTED |
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177 | je SHORT .EventCompleted |
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178 | |
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179 | call RamVars_GetSegmentToDS |
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180 | call BootMenu_GetDriveToDXforMenuitemInCX |
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181 | or bl,dl ; or drive number with bit from .RefreshItemFromCX or .RefreshInformation |
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182 | shl bl,1 ; drive letter high order bit to CF, Item/Information bit to SF |
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183 | jc SHORT BootMenuPrint_HardDiskMenuitem |
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184 | |
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185 | ;;; |
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186 | ;;; Fall-through (to BootMenuPrint_FloppyMenuitem) |
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187 | ;;; (checked at assembler time with the code after BootMenuPrint_FloppyMenuitem) |
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188 | ;;; |
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189 | ALIGN JUMP_ALIGN |
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190 | BootMenuEvent_FallThroughToFloppyMenuitem: |
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191 | |
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