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 | ;-------------------------------------------------------------------- |
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25 | ; GetDefaultMenuitemToDL |
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26 | ; Parameters: |
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27 | ; DL: Drive number |
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28 | ; ES: Ptr to BDA (zero) |
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29 | ; Returns: |
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30 | ; DL: Menuitem index (assuming drive is available) |
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31 | ; Corrupts registers: |
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32 | ; AX, DH |
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33 | ;-------------------------------------------------------------------- |
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34 | GetDefaultMenuitemToDX: |
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35 | mov dx, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.wHddAndFddLetters] |
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36 | test BYTE [es:BOOTVARS.hotkeyVars+HOTKEYVARS.bFlags], FLG_HOTKEY_HD_FIRST |
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37 | eCMOVZ dl, dh |
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38 | call IsDriveDLinSystem |
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39 | jnc SHORT DoNotSetDefaultMenuitem |
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40 | call DriveXlate_SetDriveToSwap |
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41 | ; Fall to GetMenuitemToDXforDriveInDL |
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42 | |
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43 | |
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44 | ;-------------------------------------------------------------------- |
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45 | ; GetMenuitemToDXforDriveInDL |
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46 | ; Parameters: |
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47 | ; DL: Drive number |
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48 | ; Returns: |
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49 | ; DX: Menuitem index (assuming drive is available) |
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50 | ; Corrupts registers: |
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51 | ; AX |
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52 | ;-------------------------------------------------------------------- |
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53 | GetMenuitemToDXforDriveInDL: |
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54 | xor dh, dh ; Drive number now in DX |
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55 | test dl, dl |
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56 | jns SHORT .ReturnItemIndexInDX ; Return if floppy drive (HD bit not set) |
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57 | call FloppyDrive_GetCountToAX |
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58 | and dl, ~80h ; Clear HD bit |
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59 | add dx, ax |
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60 | .ReturnItemIndexInDX: |
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61 | ret |
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62 | |
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63 | |
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64 | ;-------------------------------------------------------------------- |
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65 | ; IsDriveDLinSystem |
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66 | ; Parameters: |
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67 | ; DL: Drive number |
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68 | ; DS: RAMVARS segment |
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69 | ; Returns: |
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70 | ; CF: Set if drive number is valid |
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71 | ; Clear if drive is not present in system |
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72 | ; Corrupts registers: |
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73 | ; AX, CX |
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74 | ;-------------------------------------------------------------------- |
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75 | IsDriveDLinSystem: |
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76 | test dl, dl ; Floppy drive? |
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77 | jns SHORT .IsFloppyDriveInSystem |
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78 | call RamVars_GetHardDiskCountFromBDAtoAX ; Hard Disk count to AX |
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79 | or al, 80h ; Set Hard Disk bit to AX |
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80 | jmp SHORT .CompareDriveNumberToDriveCount |
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81 | .IsFloppyDriveInSystem: |
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82 | call FloppyDrive_GetCountToAX |
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83 | .CompareDriveNumberToDriveCount: |
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84 | cmp dl, al ; Set CF when DL is smaller |
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85 | ret |
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86 | |
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87 | |
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88 | ;-------------------------------------------------------------------- |
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89 | ; BootMenuEvent_Handler |
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90 | ; Common parameters for all events: |
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91 | ; BX: Menu event (anything from MENUEVENT struct) |
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92 | ; SS:BP: Menu library handle |
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93 | ; Common return values for all events: |
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94 | ; CF: Set if event processed |
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95 | ; Cleared if event not processed |
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96 | ; Corrupts registers: |
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97 | ; All |
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98 | ;-------------------------------------------------------------------- |
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99 | BootMenuEvent_Handler: |
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100 | LOAD_BDA_SEGMENT_TO es, di |
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101 | call RamVars_GetSegmentToDS |
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102 | |
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103 | %ifdef MENUEVENT_INLINE_OFFSETS |
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104 | |
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105 | add bx, FirstEvent |
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106 | jmp bx |
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107 | |
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108 | EventNotHandled: |
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109 | DoNotSetDefaultMenuitem: |
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110 | xor dx, dx ; Clear CF (and menuitem index for DoNotSetDefaultMenuitem) |
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111 | ret |
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112 | |
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113 | MENUEVENT_InitializeMenuinitFromDSSI equ (EventInitializeMenuinitFromSSBP - FirstEvent) |
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114 | MENUEVENT_ExitMenu equ (BootMenuEvent_Completed - FirstEvent) |
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115 | MENUEVENT_ItemHighlightedFromCX equ (EventItemHighlightedFromCX - FirstEvent) |
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116 | MENUEVENT_ItemSelectedFromCX equ (EventItemSelectedFromCX - FirstEvent) |
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117 | MENUEVENT_KeyStrokeInAX equ (EventKeyStrokeInAX - FirstEvent) |
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118 | MENUEVENT_RefreshTitle equ (BootMenuPrint_TitleStrings - FirstEvent) |
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119 | MENUEVENT_RefreshInformation equ (BootMenuPrint_RefreshInformation - FirstEvent) |
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120 | MENUEVENT_RefreshItemFromCX equ (BootMenuPrint_RefreshItem - FirstEvent) |
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121 | ; |
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122 | ; Note that there is no entry for MENUEVENT_IdleProcessing. If MENUEVENT_IDLEPROCESSING_ENABLE is not %defined, |
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123 | ; then the entry point will not be called (saving memory on this end and at the CALL point). |
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124 | ; |
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125 | |
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126 | %else |
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127 | |
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128 | cmp bx, BYTE MENUEVENT.RefreshItemFromCX ; Above last supported item? |
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129 | ja SHORT EventNotHandled |
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130 | jmp [cs:bx+rgfnEventSpecificHandlers] |
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131 | |
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132 | EventNotHandled: |
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133 | DoNotSetDefaultMenuitem: |
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134 | xor dx, dx ; Clear CF (and menuitem index for DoNotSetDefaultMenuitem) |
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135 | ret |
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136 | |
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137 | rgfnEventSpecificHandlers: |
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138 | dw EventInitializeMenuinitFromSSBP ; MENUEVENT.InitializeMenuinitFromDSSI |
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139 | dw EventCompleted ; MENUEVENT.ExitMenu |
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140 | dw EventNotHandled ; MENUEVENT.IdleProcessing |
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141 | dw EventItemHighlightedFromCX ; MENUEVENT.ItemHighlightedFromCX |
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142 | dw EventItemSelectedFromCX ; MENUEVENT.ItemSelectedFromCX |
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143 | dw EventKeyStrokeInAX ; MENUEVENT.KeyStrokeInAX |
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144 | dw BootMenuPrint_TitleStrings ; MENUEVENT.RefreshTitle |
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145 | dw BootMenuPrint_RefreshInformation ; MENUEVENT.RefreshInformation |
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146 | dw BootMenuPrint_RefreshItem ; MENUEVENT.RefreshItemFromCX |
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147 | |
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148 | %endif |
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149 | |
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150 | |
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151 | ;-------------------------------------------------------------------- |
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152 | ; EventInitializeMenuinitFromSSBP |
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153 | ; Parameters |
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154 | ; DS: Ptr to RAMVARS |
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155 | ; ES: Ptr to BDA (zero) |
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156 | ; SS:BP: Ptr to MENUINIT struct to initialize |
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157 | ; Returns: |
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158 | ; CF: Set if event processed |
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159 | ; Cleared if event not processed |
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160 | ; Corrupts registers: |
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161 | ; Does not matter |
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162 | ;-------------------------------------------------------------------- |
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163 | FirstEvent: |
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164 | EventInitializeMenuinitFromSSBP: |
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165 | ; Store default Menuitem (=default drive to boot from) |
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166 | call GetDefaultMenuitemToDX |
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167 | mov [bp+MENUINIT.wHighlightedItem], dx |
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168 | |
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169 | ; Store number of Menuitems |
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170 | call RamVars_GetHardDiskCountFromBDAtoAX |
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171 | xchg ax, cx |
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172 | call FloppyDrive_GetCountToAX |
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173 | add ax, cx |
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174 | mov [bp+MENUINIT.wItems], ax |
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175 | |
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176 | ; Store menu size |
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177 | mov WORD [bp+MENUINIT.wTitleAndInfoLines], BOOT_MENU_TITLE_AND_INFO_LINES |
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178 | mov BYTE [bp+MENUINIT.bWidth], BOOT_MENU_WIDTH |
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179 | add al, BOOT_MENU_HEIGHT_WITHOUT_ITEMS |
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180 | xchg cx, ax |
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181 | CALL_DISPLAY_LIBRARY GetColumnsToALandRowsToAH |
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182 | sub ah, MENU_SCREEN_BOTTOM_LINES*2 ; Leave space for Hotkey Bar |
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183 | MIN_U ah, cl |
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184 | mov [bp+MENUINIT.bHeight], ah |
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185 | |
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186 | ; Store selection timeout |
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187 | mov ax, [cs:ROMVARS.wBootTimeout] |
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188 | CALL_MENU_LIBRARY StartSelectionTimeoutWithTicksInAX |
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189 | stc |
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190 | ret |
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191 | |
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192 | |
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193 | ;-------------------------------------------------------------------- |
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194 | ; EventItemHighlightedFromCX |
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195 | ; Parameters |
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196 | ; CX: Index of new highlighted item |
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197 | ; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED |
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198 | ; DS: Ptr to RAMVARS |
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199 | ; ES: Ptr to BDA (zero) |
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200 | ; SS:BP: Menu library handle |
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201 | ; Returns: |
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202 | ; CF: Set if event processed |
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203 | ; Cleared if event not processed |
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204 | ; Corrupts registers: |
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205 | ; Does not matter |
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206 | ;-------------------------------------------------------------------- |
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207 | EventItemHighlightedFromCX: |
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208 | push cx |
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209 | call BootMenu_GetDriveToDXforMenuitemInCX |
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210 | call DriveXlate_Reset |
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211 | call DriveXlate_SetDriveToSwap |
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212 | |
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213 | ; We need to generate keystroke so selection two drives is possible. |
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214 | ; The secondary boot drive is selected by highlighting it using menu keys |
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215 | ; and the primary boot drive is selected by pressing drive letter hotkey. |
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216 | call BootVars_StoreHotkeyForDriveNumberInDL |
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217 | call RedrawHotkeyBarFromInsideMenuEventHandler |
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218 | |
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219 | ; Redraw changes in drive numbers |
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220 | xor ax, ax ; Update first floppy drive (for translated drive number) |
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221 | CALL_MENU_LIBRARY RefreshItemFromAX |
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222 | mov dl, 80h |
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223 | call GetMenuitemToDXforDriveInDL |
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224 | xchg ax, dx ; Update first hard disk (for translated drive number) |
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225 | CALL_MENU_LIBRARY RefreshItemFromAX |
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226 | pop ax ; Update new item (for translated drive number) |
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227 | CALL_MENU_LIBRARY RefreshItemFromAX |
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228 | CALL_MENU_LIBRARY RefreshInformation |
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229 | stc |
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230 | ret |
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231 | |
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232 | |
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233 | ;-------------------------------------------------------------------- |
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234 | ; EventKeyStrokeInAX |
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235 | ; Parameters |
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236 | ; AL: ASCII character for the key |
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237 | ; AH: Keyboard library scan code for the key |
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238 | ; DS: Ptr to RAMVARS |
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239 | ; ES: Ptr to BDA (zero) |
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240 | ; SS:BP: Menu library handle |
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241 | ; Returns: |
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242 | ; CF: Set if event processed |
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243 | ; Cleared if event not processed |
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244 | ; Corrupts registers: |
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245 | ; Does not matter |
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246 | ;-------------------------------------------------------------------- |
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247 | EventKeyStrokeInAX: |
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248 | cmp ah, BOOT_MENU_HOTKEY_SCANCODE |
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249 | je SHORT BootMenuEvent_Completed ; Ignore Boot Menu hotkey |
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250 | call HotkeyBar_StoreHotkeyToBootvarsIfValidKeystrokeInAX |
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251 | jnc SHORT BootMenuEvent_Completed |
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252 | |
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253 | ; Hotkey is now stored to BOOTVARS and menu can be closed |
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254 | jmp SHORT CloseBootMenu |
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255 | |
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256 | |
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257 | ;-------------------------------------------------------------------- |
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258 | ; EventItemSelectedFromCX |
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259 | ; Parameters |
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260 | ; CX: Index of selected item |
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261 | ; DS: Ptr to RAMVARS |
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262 | ; ES: Ptr to BDA (zero) |
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263 | ; SS:BP: Menu library handle |
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264 | ; Returns: |
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265 | ; CF: Set if event processed |
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266 | ; Cleared if event not processed |
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267 | ; Corrupts registers: |
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268 | ; Does not matter |
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269 | ;-------------------------------------------------------------------- |
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270 | EventItemSelectedFromCX: |
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271 | call BootMenu_GetDriveToDXforMenuitemInCX |
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272 | jnc SHORT BootMenuEvent_Completed ; No menuitem selected |
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273 | |
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274 | ; Convert selected drive to hotkey keystroke |
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275 | call HotkeyBar_StoreHotkeyToBootvarsForDriveLetterInDL |
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276 | ; Fall to CloseBootMenu |
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277 | |
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278 | |
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279 | ;-------------------------------------------------------------------- |
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280 | ; CloseBootMenu |
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281 | ; Parameters |
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282 | ; DS: RAMVARS segment |
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283 | ; ES: BDA segment (zero) |
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284 | ; Returns: |
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285 | ; Nothing |
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286 | ; Corrupts registers: |
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287 | ; Does not matter |
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288 | ;-------------------------------------------------------------------- |
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289 | CloseBootMenu: |
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290 | call DriveXlate_Reset |
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291 | CALL_MENU_LIBRARY Close |
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292 | ; Fall to RedrawHotkeyBarFromInsideMenuEventHandler |
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293 | |
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294 | |
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295 | ;-------------------------------------------------------------------- |
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296 | ; RedrawHotkeyBarFromInsideMenuEventHandler |
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297 | ; Parameters |
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298 | ; DS: RAMVARS segment |
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299 | ; ES: BDA segment (zero) |
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300 | ; Returns: |
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301 | ; Nothing |
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302 | ; Corrupts registers: |
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303 | ; AX, BX, CX, DX, SI, DI |
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304 | ;-------------------------------------------------------------------- |
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305 | RedrawHotkeyBarFromInsideMenuEventHandler: |
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306 | mov al, MONO_NORMAL |
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307 | CALL_DISPLAY_LIBRARY SetCharacterAttributeFromAL |
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308 | |
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309 | mov bl, ATTRIBUTES_ARE_USED |
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310 | mov ax, TELETYPE_OUTPUT_WITH_ATTRIBUTE |
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311 | CALL_DISPLAY_LIBRARY SetCharOutputFunctionFromAXwithAttribFlagInBL |
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312 | call HotkeyBar_DrawToTopOfScreen |
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313 | ; Fall to BootMenuEvent_Completed |
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314 | |
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315 | |
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316 | ;-------------------------------------------------------------------- |
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317 | ; BootMenuEvent_Completed |
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318 | ; Parameters |
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319 | ; Nothing |
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320 | ; Returns: |
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321 | ; CF: Set to exit from menu |
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322 | ; Corrupts registers: |
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323 | ; Nothing |
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324 | ;-------------------------------------------------------------------- |
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325 | BootMenuEvent_Completed: |
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326 | stc |
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327 | ret |
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