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 | ; |
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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 code |
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21 | SECTION .text |
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22 | |
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23 | ;-------------------------------------------------------------------- |
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24 | ; BootMenuEvent_Handler |
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25 | ; Common parameters for all events: |
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26 | ; BX: Menu event (anything from MENUEVENT struct) |
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27 | ; SS:BP: Menu library handle |
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28 | ; Common return values for all events: |
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29 | ; CF: Set if event processed |
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30 | ; Cleared if event not processed |
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31 | ; Corrupts registers: |
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32 | ; All |
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33 | ;-------------------------------------------------------------------- |
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34 | BootMenuEvent_Handler: |
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35 | |
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36 | %ifdef MENUEVENT_INLINE_OFFSETS |
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37 | |
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38 | add bx, BootMenuEvent_Handler.FirstEvent |
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39 | jmp bx |
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40 | |
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41 | MENUEVENT_InitializeMenuinitFromDSSI equ (BootMenuEvent_Handler.InitializeMenuinitFromDSSI - BootMenuEvent_Handler.FirstEvent) |
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42 | MENUEVENT_ExitMenu equ (BootMenuEvent_EventCompleted - BootMenuEvent_Handler.FirstEvent) |
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43 | MENUEVENT_ItemHighlightedFromCX equ (BootMenuEvent_Handler.ItemHighlightedFromCX - BootMenuEvent_Handler.FirstEvent) |
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44 | MENUEVENT_ItemSelectedFromCX equ (BootMenuEvent_Handler.ItemSelectedFromCX - BootMenuEvent_Handler.FirstEvent) |
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45 | MENUEVENT_KeyStrokeInAX equ (BootMenuEvent_Handler.KeyStrokeInAX - BootMenuEvent_Handler.FirstEvent) |
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46 | MENUEVENT_RefreshTitle equ (BootMenuPrint_TitleStrings - BootMenuEvent_Handler.FirstEvent) |
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47 | MENUEVENT_RefreshInformation equ (BootMenuPrint_RefreshInformation - BootMenuEvent_Handler.FirstEvent) |
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48 | MENUEVENT_RefreshItemFromCX equ (BootMenuPrint_RefreshItem - BootMenuEvent_Handler.FirstEvent) |
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49 | ; |
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50 | ; Note that there is no entry for MENUEVENT_IdleProcessing. If MENUEVENT_IDLEPROCESSING_ENABLE is not %defined, |
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51 | ; then the entry point will not be called (saving memory on this end and at the CALL point). |
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52 | ; |
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53 | |
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54 | %else |
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55 | |
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56 | cmp bx, BYTE MENUEVENT.RefreshItemFromCX ; Above last supported item? |
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57 | ja SHORT .EventNotHandled |
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58 | jmp [cs:bx+.rgfnEventSpecificHandlers] |
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59 | |
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60 | .EventNotHandled: |
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61 | clc |
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62 | ret |
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63 | |
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64 | ALIGN WORD_ALIGN |
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65 | .rgfnEventSpecificHandlers: |
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66 | dw .InitializeMenuinitFromDSSI ; MENUEVENT.InitializeMenuinitFromDSSI |
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67 | dw BootMenuEvent_EventCompleted ; MENUEVENT.ExitMenu |
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68 | dw .EventNotHandled ; MENUEVENT.IdleProcessing |
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69 | dw .ItemHighlightedFromCX ; MENUEVENT.ItemHighlightedFromCX |
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70 | dw .ItemSelectedFromCX ; MENUEVENT.ItemSelectedFromCX |
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71 | dw .KeyStrokeInAX ; MENUEVENT.KeyStrokeInAX |
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72 | dw BootMenuPrint_TitleStrings ; MENUEVENT.RefreshTitle |
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73 | dw BootMenuPrint_RefreshInformation ; MENUEVENT.RefreshInformation |
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74 | dw BootMenuPrint_RefreshItem ; MENUEVENT.RefreshItemFromCX |
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75 | |
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76 | %endif |
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77 | |
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78 | |
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79 | ; Parameters: |
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80 | ; DS:SI: Ptr to MENUINIT struct to initialize |
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81 | ; Returns: |
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82 | ; DS:SI: Ptr to initialized MENUINIT struct |
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83 | .FirstEvent: |
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84 | .InitializeMenuinitFromDSSI: |
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85 | push ds |
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86 | call RamVars_GetSegmentToDS |
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87 | call .GetDefaultMenuitemToDX |
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88 | call BootMenu_GetMenuitemCountToAX |
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89 | pop ds |
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90 | mov [si+MENUINIT.wItems], ax |
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91 | mov [si+MENUINIT.wHighlightedItem], dx |
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92 | mov WORD [si+MENUINIT.wTitleAndInfoLines], BOOT_MENU_TITLE_AND_INFO_LINES |
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93 | mov BYTE [si+MENUINIT.bWidth], BOOT_MENU_WIDTH |
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94 | call BootMenu_GetHeightToAHwithItemCountInAL |
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95 | mov [si+MENUINIT.bHeight], ah |
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96 | mov ax, [cs:ROMVARS.wBootTimeout] |
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97 | CALL_MENU_LIBRARY StartSelectionTimeoutWithTicksInAX |
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98 | stc |
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99 | ret |
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100 | |
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101 | .GetDefaultMenuitemToDX: |
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102 | mov dl, [cs:ROMVARS.bBootDrv] ; Default boot drive |
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103 | call BootMenu_IsDriveInSystem |
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104 | jnc SHORT .DoNotSetDefaultMenuitem |
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105 | call DriveXlate_SetDriveToSwap |
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106 | jmp BootMenu_GetMenuitemToDXforDriveInDL |
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107 | |
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108 | .DoNotSetDefaultMenuitem: |
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109 | xor dx, dx ; Whatever appears first on boot menu |
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110 | ret |
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111 | |
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112 | |
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113 | ; Parameters: |
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114 | ; CX: Index of new highlighted item |
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115 | ; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED |
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116 | .ItemHighlightedFromCX: |
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117 | push cx |
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118 | call BootMenu_GetDriveToDXforMenuitemInCX_And_RamVars_GetSegmentToDS |
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119 | call DriveXlate_Reset |
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120 | call DriveXlate_SetDriveToSwap |
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121 | |
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122 | xor ax, ax ; Update first floppy drive (for translated drive number) |
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123 | CALL_MENU_LIBRARY RefreshItemFromAX |
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124 | mov dl, 80h |
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125 | call BootMenu_GetMenuitemToDXforDriveInDL |
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126 | xchg ax, dx ; Update first hard disk (for translated drive number) |
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127 | CALL_MENU_LIBRARY RefreshItemFromAX |
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128 | pop ax ; Update new item (for translated drive number) |
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129 | CALL_MENU_LIBRARY RefreshItemFromAX |
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130 | CALL_MENU_LIBRARY RefreshInformation |
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131 | stc |
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132 | ret |
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133 | |
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134 | |
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135 | ; Parameters: |
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136 | ; AL: ASCII character for the key |
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137 | ; AH: Keyboard library scan code for the key |
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138 | .KeyStrokeInAX: |
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139 | cmp ah, ROM_BOOT_HOTKEY_SCANCODE |
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140 | jne SHORT .CheckDriveHotkeys |
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141 | ;; NOTE: carry flag will be clear after compare above that resulted in zero |
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142 | jmp Int19hMenu_JumpToBootSector_or_RomBoot |
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143 | |
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144 | .CheckDriveHotkeys: |
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145 | call BootMenu_GetMenuitemToAXforAsciiHotkeyInAL |
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146 | cmp ax, [bp+MENUINIT.wItems] |
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147 | jae SHORT BootMenuEvent_EventCompleted ; Invalid key |
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148 | |
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149 | ; Highlighting new item resets drive translation and we do not want that. |
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150 | ; We must be able to translate both floppy drive and hard drive when using hotkey. |
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151 | call RamVars_GetSegmentToDS |
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152 | mov dx, [RAMVARS.xlateVars+XLATEVARS.wFDandHDswap] |
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153 | CALL_MENU_LIBRARY HighlightItemFromAX |
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154 | or [RAMVARS.xlateVars+XLATEVARS.wFDandHDswap], dx |
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155 | ; Fall to .ItemSelectedFromCX |
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156 | |
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157 | |
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158 | ; Parameters: |
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159 | ; CX: Index of selected item |
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160 | .ItemSelectedFromCX: |
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161 | CALL_MENU_LIBRARY Close |
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162 | |
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163 | BootMenuEvent_EventCompleted: |
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164 | stc |
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165 | ret |
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166 | |
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