[88] | 1 | ; Project name : XTIDE Universal BIOS |
---|
[3] | 2 | ; Description : Boot Menu event handler for menu library callbacks. |
---|
| 3 | |
---|
| 4 | ; Section containing code |
---|
| 5 | SECTION .text |
---|
| 6 | |
---|
| 7 | ;-------------------------------------------------------------------- |
---|
| 8 | ; BootMenuEvent_Handler |
---|
[88] | 9 | ; Common parameters for all events: |
---|
| 10 | ; BX: Menu event (anything from MENUEVENT struct) |
---|
| 11 | ; SS:BP: Menu library handle |
---|
| 12 | ; Common return values for all events: |
---|
| 13 | ; CF: Set if event processed |
---|
| 14 | ; Cleared if event not processed |
---|
[3] | 15 | ; Corrupts registers: |
---|
[88] | 16 | ; All |
---|
[3] | 17 | ;-------------------------------------------------------------------- |
---|
| 18 | BootMenuEvent_Handler: |
---|
[202] | 19 | |
---|
[183] | 20 | %ifdef MENUEVENT_INLINE_OFFSETS |
---|
[202] | 21 | |
---|
[258] | 22 | add bx, BootMenuEvent_Handler.FirstEvent |
---|
[183] | 23 | jmp bx |
---|
[3] | 24 | |
---|
[258] | 25 | MENUEVENT_InitializeMenuinitFromDSSI equ (BootMenuEvent_Handler.InitializeMenuinitFromDSSI - BootMenuEvent_Handler.FirstEvent) |
---|
| 26 | MENUEVENT_ExitMenu equ (BootMenuEvent_EventCompleted - BootMenuEvent_Handler.FirstEvent) |
---|
| 27 | MENUEVENT_ItemHighlightedFromCX equ (BootMenuEvent_Handler.ItemHighlightedFromCX - BootMenuEvent_Handler.FirstEvent) |
---|
| 28 | MENUEVENT_ItemSelectedFromCX equ (BootMenuEvent_Handler.ItemSelectedFromCX - BootMenuEvent_Handler.FirstEvent) |
---|
| 29 | MENUEVENT_KeyStrokeInAX equ (BootMenuEvent_Handler.KeyStrokeInAX - BootMenuEvent_Handler.FirstEvent) |
---|
| 30 | MENUEVENT_RefreshTitle equ (BootMenuPrint_TitleStrings - BootMenuEvent_Handler.FirstEvent) |
---|
| 31 | MENUEVENT_RefreshInformation equ (BootMenuPrint_RefreshInformation - BootMenuEvent_Handler.FirstEvent) |
---|
| 32 | MENUEVENT_RefreshItemFromCX equ (BootMenuPrint_RefreshItem - BootMenuEvent_Handler.FirstEvent) |
---|
[202] | 33 | ; |
---|
| 34 | ; Note that there is no entry for MENUEVENT_IdleProcessing. If MENUEVENT_IDLEPROCESSING_ENABLE is not %defined, |
---|
[189] | 35 | ; then the entry point will not be called (saving memory on this end and at the CALL point). |
---|
| 36 | ; |
---|
[202] | 37 | |
---|
[183] | 38 | %else |
---|
[202] | 39 | |
---|
[189] | 40 | cmp bx, BYTE MENUEVENT.RefreshItemFromCX ; Above last supported item? |
---|
| 41 | ja SHORT .EventNotHandled |
---|
| 42 | jmp [cs:bx+.rgfnEventSpecificHandlers] |
---|
| 43 | |
---|
| 44 | .EventNotHandled: |
---|
| 45 | clc |
---|
| 46 | ret |
---|
[202] | 47 | |
---|
[3] | 48 | ALIGN WORD_ALIGN |
---|
[88] | 49 | .rgfnEventSpecificHandlers: |
---|
[241] | 50 | dw .InitializeMenuinitFromDSSI ; MENUEVENT.InitializeMenuinitFromDSSI |
---|
| 51 | dw BootMenuEvent_EventCompleted ; MENUEVENT.ExitMenu |
---|
| 52 | dw .EventNotHandled ; MENUEVENT.IdleProcessing |
---|
| 53 | dw .ItemHighlightedFromCX ; MENUEVENT.ItemHighlightedFromCX |
---|
| 54 | dw .ItemSelectedFromCX ; MENUEVENT.ItemSelectedFromCX |
---|
| 55 | dw .KeyStrokeInAX ; MENUEVENT.KeyStrokeInAX |
---|
| 56 | dw BootMenuPrint_TitleStrings ; MENUEVENT.RefreshTitle |
---|
| 57 | dw BootMenuPrint_RefreshInformation ; MENUEVENT.RefreshInformation |
---|
| 58 | dw BootMenuPrint_RefreshItem ; MENUEVENT.RefreshItemFromCX |
---|
[202] | 59 | |
---|
[183] | 60 | %endif |
---|
[3] | 61 | |
---|
| 62 | |
---|
[88] | 63 | ; Parameters: |
---|
| 64 | ; DS:SI: Ptr to MENUINIT struct to initialize |
---|
| 65 | ; Returns: |
---|
| 66 | ; DS:SI: Ptr to initialized MENUINIT struct |
---|
[258] | 67 | .FirstEvent: |
---|
[88] | 68 | .InitializeMenuinitFromDSSI: |
---|
| 69 | push ds |
---|
| 70 | call RamVars_GetSegmentToDS |
---|
| 71 | call .GetDefaultMenuitemToDX |
---|
[124] | 72 | call BootMenu_GetMenuitemCountToAX |
---|
[88] | 73 | pop ds |
---|
[124] | 74 | mov [si+MENUINIT.wItems], ax |
---|
[88] | 75 | mov [si+MENUINIT.wHighlightedItem], dx |
---|
| 76 | mov WORD [si+MENUINIT.wTitleAndInfoLines], BOOT_MENU_TITLE_AND_INFO_LINES |
---|
| 77 | mov BYTE [si+MENUINIT.bWidth], BOOT_MENU_WIDTH |
---|
[124] | 78 | call BootMenu_GetHeightToAHwithItemCountInAL |
---|
[88] | 79 | mov [si+MENUINIT.bHeight], ah |
---|
[137] | 80 | mov ax, [cs:ROMVARS.wBootTimeout] |
---|
[135] | 81 | CALL_MENU_LIBRARY StartSelectionTimeoutWithTicksInAX |
---|
[88] | 82 | stc |
---|
[3] | 83 | ret |
---|
| 84 | |
---|
[88] | 85 | .GetDefaultMenuitemToDX: |
---|
| 86 | mov dl, [cs:ROMVARS.bBootDrv] ; Default boot drive |
---|
| 87 | call BootMenu_IsDriveInSystem |
---|
| 88 | jnc SHORT .DoNotSetDefaultMenuitem |
---|
| 89 | call DriveXlate_SetDriveToSwap |
---|
[124] | 90 | jmp BootMenu_GetMenuitemToDXforDriveInDL |
---|
[369] | 91 | |
---|
[88] | 92 | .DoNotSetDefaultMenuitem: |
---|
| 93 | xor dx, dx ; Whatever appears first on boot menu |
---|
| 94 | ret |
---|
[3] | 95 | |
---|
[88] | 96 | |
---|
| 97 | ; Parameters: |
---|
| 98 | ; CX: Index of new highlighted item |
---|
| 99 | ; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED |
---|
| 100 | .ItemHighlightedFromCX: |
---|
| 101 | push cx |
---|
[241] | 102 | call BootMenu_GetDriveToDXforMenuitemInCX_And_RamVars_GetSegmentToDS |
---|
[3] | 103 | call DriveXlate_Reset |
---|
| 104 | call DriveXlate_SetDriveToSwap |
---|
[140] | 105 | |
---|
| 106 | xor ax, ax ; Update first floppy drive (for translated drive number) |
---|
[88] | 107 | CALL_MENU_LIBRARY RefreshItemFromAX |
---|
[140] | 108 | mov dl, 80h |
---|
| 109 | call BootMenu_GetMenuitemToDXforDriveInDL |
---|
| 110 | xchg ax, dx ; Update first hard disk (for translated drive number) |
---|
[88] | 111 | CALL_MENU_LIBRARY RefreshItemFromAX |
---|
[140] | 112 | pop ax ; Update new item (for translated drive number) |
---|
| 113 | CALL_MENU_LIBRARY RefreshItemFromAX |
---|
[88] | 114 | CALL_MENU_LIBRARY RefreshInformation |
---|
| 115 | stc |
---|
[3] | 116 | ret |
---|
| 117 | |
---|
| 118 | |
---|
[88] | 119 | ; Parameters: |
---|
| 120 | ; AL: ASCII character for the key |
---|
| 121 | ; AH: Keyboard library scan code for the key |
---|
| 122 | .KeyStrokeInAX: |
---|
[92] | 123 | cmp ah, ROM_BOOT_HOTKEY_SCANCODE |
---|
| 124 | jne SHORT .CheckDriveHotkeys |
---|
[212] | 125 | ;; NOTE: carry flag will be clear after compare above that resulted in zero |
---|
| 126 | jmp Int19hMenu_JumpToBootSector_or_RomBoot |
---|
[369] | 127 | |
---|
[92] | 128 | .CheckDriveHotkeys: |
---|
[130] | 129 | call BootMenu_GetMenuitemToAXforAsciiHotkeyInAL |
---|
| 130 | cmp ax, [bp+MENUINIT.wItems] |
---|
[241] | 131 | jae SHORT BootMenuEvent_EventCompleted ; Invalid key |
---|
[248] | 132 | |
---|
| 133 | ; Highlighting new item resets drive translation and we do not want that. |
---|
| 134 | ; We must be able to translate both floppy drive and hard drive when using hotkey. |
---|
| 135 | call RamVars_GetSegmentToDS |
---|
| 136 | mov dx, [RAMVARS.xlateVars+XLATEVARS.wFDandHDswap] |
---|
[88] | 137 | CALL_MENU_LIBRARY HighlightItemFromAX |
---|
[248] | 138 | or [RAMVARS.xlateVars+XLATEVARS.wFDandHDswap], dx |
---|
[88] | 139 | ; Fall to .ItemSelectedFromCX |
---|
[3] | 140 | |
---|
| 141 | |
---|
[88] | 142 | ; Parameters: |
---|
| 143 | ; CX: Index of selected item |
---|
| 144 | .ItemSelectedFromCX: |
---|
| 145 | CALL_MENU_LIBRARY Close |
---|
[248] | 146 | |
---|
[241] | 147 | BootMenuEvent_EventCompleted: |
---|
[88] | 148 | stc |
---|
[3] | 149 | ret |
---|
| 150 | |
---|