| 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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