[88] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 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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[88] | 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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[3] | 15 | ; Corrupts registers: |
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[88] | 16 | ; All |
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[3] | 17 | ;-------------------------------------------------------------------- |
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| 18 | ALIGN JUMP_ALIGN |
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| 19 | BootMenuEvent_Handler: |
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[202] | 20 | |
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[183] | 21 | %ifdef MENUEVENT_INLINE_OFFSETS |
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[202] | 22 | |
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[258] | 23 | add bx, BootMenuEvent_Handler.FirstEvent |
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[183] | 24 | jmp bx |
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[3] | 25 | |
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[258] | 26 | MENUEVENT_InitializeMenuinitFromDSSI equ (BootMenuEvent_Handler.InitializeMenuinitFromDSSI - BootMenuEvent_Handler.FirstEvent) |
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| 27 | MENUEVENT_ExitMenu equ (BootMenuEvent_EventCompleted - BootMenuEvent_Handler.FirstEvent) |
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| 28 | MENUEVENT_ItemHighlightedFromCX equ (BootMenuEvent_Handler.ItemHighlightedFromCX - BootMenuEvent_Handler.FirstEvent) |
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| 29 | MENUEVENT_ItemSelectedFromCX equ (BootMenuEvent_Handler.ItemSelectedFromCX - BootMenuEvent_Handler.FirstEvent) |
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| 30 | MENUEVENT_KeyStrokeInAX equ (BootMenuEvent_Handler.KeyStrokeInAX - BootMenuEvent_Handler.FirstEvent) |
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| 31 | MENUEVENT_RefreshTitle equ (BootMenuPrint_TitleStrings - BootMenuEvent_Handler.FirstEvent) |
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| 32 | MENUEVENT_RefreshInformation equ (BootMenuPrint_RefreshInformation - BootMenuEvent_Handler.FirstEvent) |
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| 33 | MENUEVENT_RefreshItemFromCX equ (BootMenuPrint_RefreshItem - BootMenuEvent_Handler.FirstEvent) |
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[202] | 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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[189] | 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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[202] | 38 | |
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[183] | 39 | %else |
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[202] | 40 | |
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[189] | 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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[202] | 48 | |
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[3] | 49 | ALIGN WORD_ALIGN |
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[88] | 50 | .rgfnEventSpecificHandlers: |
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[241] | 51 | dw .InitializeMenuinitFromDSSI ; MENUEVENT.InitializeMenuinitFromDSSI |
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| 52 | dw BootMenuEvent_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 BootMenuPrint_RefreshInformation ; MENUEVENT.RefreshInformation |
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| 59 | dw BootMenuPrint_RefreshItem ; MENUEVENT.RefreshItemFromCX |
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[202] | 60 | |
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[183] | 61 | %endif |
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[3] | 62 | |
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| 63 | |
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[88] | 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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[3] | 68 | ALIGN JUMP_ALIGN |
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[258] | 69 | .FirstEvent: |
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[88] | 70 | .InitializeMenuinitFromDSSI: |
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| 71 | push ds |
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| 72 | call RamVars_GetSegmentToDS |
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| 73 | call .GetDefaultMenuitemToDX |
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[124] | 74 | call BootMenu_GetMenuitemCountToAX |
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[88] | 75 | pop ds |
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[124] | 76 | mov [si+MENUINIT.wItems], ax |
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[88] | 77 | mov [si+MENUINIT.wHighlightedItem], dx |
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| 78 | mov WORD [si+MENUINIT.wTitleAndInfoLines], BOOT_MENU_TITLE_AND_INFO_LINES |
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| 79 | mov BYTE [si+MENUINIT.bWidth], BOOT_MENU_WIDTH |
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[124] | 80 | call BootMenu_GetHeightToAHwithItemCountInAL |
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[88] | 81 | mov [si+MENUINIT.bHeight], ah |
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[137] | 82 | mov ax, [cs:ROMVARS.wBootTimeout] |
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[135] | 83 | CALL_MENU_LIBRARY StartSelectionTimeoutWithTicksInAX |
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[88] | 84 | stc |
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[3] | 85 | ret |
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| 86 | |
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[88] | 87 | ALIGN JUMP_ALIGN |
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| 88 | .GetDefaultMenuitemToDX: |
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| 89 | mov dl, [cs:ROMVARS.bBootDrv] ; Default boot drive |
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| 90 | call BootMenu_IsDriveInSystem |
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| 91 | jnc SHORT .DoNotSetDefaultMenuitem |
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| 92 | call DriveXlate_SetDriveToSwap |
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[124] | 93 | jmp BootMenu_GetMenuitemToDXforDriveInDL |
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[88] | 94 | ALIGN JUMP_ALIGN |
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| 95 | .DoNotSetDefaultMenuitem: |
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| 96 | xor dx, dx ; Whatever appears first on boot menu |
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| 97 | ret |
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[3] | 98 | |
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[88] | 99 | |
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| 100 | ; Parameters: |
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| 101 | ; CX: Index of new highlighted item |
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| 102 | ; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED |
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[3] | 103 | ALIGN JUMP_ALIGN |
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[88] | 104 | .ItemHighlightedFromCX: |
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| 105 | push cx |
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[241] | 106 | call BootMenu_GetDriveToDXforMenuitemInCX_And_RamVars_GetSegmentToDS |
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[3] | 107 | call DriveXlate_Reset |
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| 108 | call DriveXlate_SetDriveToSwap |
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[140] | 109 | |
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| 110 | xor ax, ax ; Update first floppy drive (for translated drive number) |
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[88] | 111 | CALL_MENU_LIBRARY RefreshItemFromAX |
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[140] | 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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[88] | 115 | CALL_MENU_LIBRARY RefreshItemFromAX |
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[140] | 116 | pop ax ; Update new item (for translated drive number) |
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| 117 | CALL_MENU_LIBRARY RefreshItemFromAX |
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[88] | 118 | CALL_MENU_LIBRARY RefreshInformation |
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| 119 | stc |
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[3] | 120 | ret |
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| 121 | |
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| 122 | |
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[88] | 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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[3] | 126 | ALIGN JUMP_ALIGN |
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[88] | 127 | .KeyStrokeInAX: |
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[92] | 128 | cmp ah, ROM_BOOT_HOTKEY_SCANCODE |
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| 129 | jne SHORT .CheckDriveHotkeys |
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[212] | 130 | ;; NOTE: carry flag will be clear after compare above that resulted in zero |
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| 131 | jmp Int19hMenu_JumpToBootSector_or_RomBoot |
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[92] | 132 | ALIGN JUMP_ALIGN |
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| 133 | .CheckDriveHotkeys: |
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[130] | 134 | call BootMenu_GetMenuitemToAXforAsciiHotkeyInAL |
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| 135 | cmp ax, [bp+MENUINIT.wItems] |
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[241] | 136 | jae SHORT BootMenuEvent_EventCompleted ; Invalid key |
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[248] | 137 | |
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| 138 | ; Highlighting new item resets drive translation and we do not want that. |
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| 139 | ; We must be able to translate both floppy drive and hard drive when using hotkey. |
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| 140 | call RamVars_GetSegmentToDS |
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| 141 | mov dx, [RAMVARS.xlateVars+XLATEVARS.wFDandHDswap] |
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[88] | 142 | CALL_MENU_LIBRARY HighlightItemFromAX |
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[248] | 143 | or [RAMVARS.xlateVars+XLATEVARS.wFDandHDswap], dx |
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[88] | 144 | ; Fall to .ItemSelectedFromCX |
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[3] | 145 | |
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| 146 | |
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[88] | 147 | ; Parameters: |
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| 148 | ; CX: Index of selected item |
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[3] | 149 | ALIGN JUMP_ALIGN |
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[88] | 150 | .ItemSelectedFromCX: |
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| 151 | CALL_MENU_LIBRARY Close |
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[248] | 152 | |
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[241] | 153 | BootMenuEvent_EventCompleted: |
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[88] | 154 | stc |
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[3] | 155 | ret |
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| 156 | |
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