| 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 | ; Section containing code
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| 5 | SECTION .text
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| 6 |
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| 7 | struc ITEM_TYPE_REFRESH
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| 8 | .HardDisk resb 2
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| 9 | .FloppyDrive resb 2
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| 10 | endstruc
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| 11 |
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| 12 |
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| 13 | ;--------------------------------------------------------------------
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| 14 | ; BootMenuEvent_Handler
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| 15 | ; Common parameters for all events:
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| 16 | ; BX: Menu event (anything from MENUEVENT struct)
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| 17 | ; SS:BP: Menu library handle
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| 18 | ; Common return values for all events:
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| 19 | ; CF: Set if event processed
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| 20 | ; Cleared if event not processed
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| 21 | ; Corrupts registers:
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| 22 | ; All
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| 23 | ;--------------------------------------------------------------------
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| 24 | ALIGN JUMP_ALIGN
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| 25 | BootMenuEvent_Handler:
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| 26 | cmp bx, BYTE MENUEVENT.RefreshItemFromCX ; Above last supported item?
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| 27 | ja SHORT .EventNotHandled
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| 28 | jmp [cs:bx+.rgfnEventSpecificHandlers]
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| 29 | .EventNotHandled:
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| 30 | clc
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| 31 | ret
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| 32 |
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| 33 | ALIGN WORD_ALIGN
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| 34 | .rgfnEventSpecificHandlers:
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| 35 | dw .InitializeMenuinitFromDSSI ; MENUEVENT.InitializeMenuinitFromDSSI
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| 36 | dw .EventCompleted ; MENUEVENT.ExitMenu
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| 37 | dw .EventNotHandled ; MENUEVENT.IdleProcessing
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| 38 | dw .ItemHighlightedFromCX ; MENUEVENT.ItemHighlightedFromCX
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| 39 | dw .ItemSelectedFromCX ; MENUEVENT.ItemSelectedFromCX
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| 40 | dw .KeyStrokeInAX ; MENUEVENT.KeyStrokeInAX
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| 41 | dw BootMenuPrint_TitleStrings ; MENUEVENT.RefreshTitle
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| 42 | dw .RefreshInformation ; MENUEVENT.RefreshInformation
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| 43 | dw .RefreshItemFromCX ; MENUEVENT.RefreshItemFromCX
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| 44 |
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| 45 |
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| 46 | ; Parameters:
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| 47 | ; DS:SI: Ptr to MENUINIT struct to initialize
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| 48 | ; Returns:
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| 49 | ; DS:SI: Ptr to initialized MENUINIT struct
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| 50 | ALIGN JUMP_ALIGN
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| 51 | .InitializeMenuinitFromDSSI:
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| 52 | push ds
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| 53 | call RamVars_GetSegmentToDS
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| 54 | call .GetDefaultMenuitemToDX
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| 55 | call BootMenu_GetMenuitemCountToAX
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| 56 | pop ds
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| 57 | mov [si+MENUINIT.wItems], ax
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| 58 | mov [si+MENUINIT.wHighlightedItem], dx
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| 59 | mov WORD [si+MENUINIT.wTitleAndInfoLines], BOOT_MENU_TITLE_AND_INFO_LINES
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| 60 | mov BYTE [si+MENUINIT.bWidth], BOOT_MENU_WIDTH
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| 61 | call BootMenu_GetHeightToAHwithItemCountInAL
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| 62 | mov [si+MENUINIT.bHeight], ah
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| 63 | mov al, TICKS_PER_SECOND
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| 64 | mul BYTE [cs:ROMVARS.bBootDelay]
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| 65 | CALL_MENU_LIBRARY StartSelectionTimeoutWithTicksInAX
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| 66 | stc
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| 67 | ret
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| 68 |
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| 69 | ALIGN JUMP_ALIGN
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| 70 | .GetDefaultMenuitemToDX:
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| 71 | mov dl, [cs:ROMVARS.bBootDrv] ; Default boot drive
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| 72 | call BootMenu_IsDriveInSystem
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| 73 | jnc SHORT .DoNotSetDefaultMenuitem
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| 74 | call DriveXlate_SetDriveToSwap
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| 75 | jmp BootMenu_GetMenuitemToDXforDriveInDL
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| 76 | ALIGN JUMP_ALIGN
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| 77 | .DoNotSetDefaultMenuitem:
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| 78 | xor dx, dx ; Whatever appears first on boot menu
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| 79 | ret
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| 80 |
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| 81 |
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| 82 | ; Parameters:
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| 83 | ; CX: Index of new highlighted item
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| 84 | ; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED
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| 85 | ALIGN JUMP_ALIGN
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| 86 | .ItemHighlightedFromCX:
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| 87 | push cx
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| 88 | push dx
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| 89 | call RamVars_GetSegmentToDS
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| 90 | call DriveXlate_Reset
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| 91 | call BootMenu_GetDriveToDXforMenuitemInCX
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| 92 | call DriveXlate_SetDriveToSwap
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| 93 | pop ax ; Update previous item
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| 94 | CALL_MENU_LIBRARY RefreshItemFromAX
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| 95 | pop ax ; Update new item
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| 96 | CALL_MENU_LIBRARY RefreshItemFromAX
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| 97 | CALL_MENU_LIBRARY RefreshInformation
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| 98 | stc
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| 99 | ret
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| 100 |
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| 101 |
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| 102 | ; Parameters:
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| 103 | ; AL: ASCII character for the key
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| 104 | ; AH: Keyboard library scan code for the key
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| 105 | ALIGN JUMP_ALIGN
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| 106 | .KeyStrokeInAX:
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| 107 | cmp ah, ROM_BOOT_HOTKEY_SCANCODE
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| 108 | jne SHORT .CheckDriveHotkeys
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| 109 | jmp Int19hMenu_RomBoot
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| 110 | ALIGN JUMP_ALIGN
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| 111 | .CheckDriveHotkeys:
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| 112 | call BootMenu_GetMenuitemToAXforAsciiHotkeyInAL
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| 113 | cmp ax, [bp+MENUINIT.wItems]
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| 114 | jae SHORT .EventCompleted ; Invalid key
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| 115 | CALL_MENU_LIBRARY HighlightItemFromAX
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| 116 | ; Fall to .ItemSelectedFromCX
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| 117 |
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| 118 |
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| 119 | ; Parameters:
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| 120 | ; CX: Index of selected item
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| 121 | ALIGN JUMP_ALIGN
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| 122 | .ItemSelectedFromCX:
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| 123 | CALL_MENU_LIBRARY Close
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| 124 | .EventCompleted:
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| 125 | stc
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| 126 | ret
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| 127 |
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| 128 |
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| 129 | ; Parameters:
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| 130 | ; CX: Index of item to refresh
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| 131 | ; Cursor has been positioned to the beginning of item line
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| 132 | ALIGN JUMP_ALIGN
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| 133 | .RefreshItemFromCX:
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| 134 | mov bx, .rgwItemTypeRefresh
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| 135 | jmp SHORT .RefreshItemOrInformationWithJumpTableInCSBX
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| 136 |
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| 137 |
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| 138 | ; Parameters:
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| 139 | ; CX: Index of highlighted item
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| 140 | ; Cursor has been positioned to the beginning of first line
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| 141 | ALIGN JUMP_ALIGN
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| 142 | .RefreshInformation:
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| 143 | mov bx, .rgwInformationItemTypeRefresh
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| 144 | ; Fall to .RefreshItemOrInformationWithJumpTableInCSBX
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| 145 |
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| 146 | ;--------------------------------------------------------------------
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| 147 | ; RefreshItemOrInformationWithJumpTableInCSBX
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| 148 | ; Parameters:
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| 149 | ; CX: Index of selected menuitem
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| 150 | ; CS:BX: Ptr to ITEM_TYPE_REFRESH jump table
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| 151 | ; Returns:
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| 152 | ; CF: set since event processed
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| 153 | ;--------------------------------------------------------------------
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| 154 | .RefreshItemOrInformationWithJumpTableInCSBX:
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| 155 | cmp cl, NO_ITEM_HIGHLIGHTED
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| 156 | je SHORT .EventCompleted
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| 157 |
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| 158 | call RamVars_GetSegmentToDS
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| 159 | call BootMenu_GetDriveToDXforMenuitemInCX
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| 160 | test dl, dl ; Floppy drive?
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| 161 | jns SHORT .DrawFloppyDrive
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| 162 | jmp [cs:bx+ITEM_TYPE_REFRESH.HardDisk]
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| 163 | ALIGN JUMP_ALIGN
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| 164 | .DrawFloppyDrive:
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| 165 | jmp [cs:bx+ITEM_TYPE_REFRESH.FloppyDrive]
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| 166 |
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| 167 | ; Jump tables for .RefreshItemOrInformationWithJumpTableInCSBX
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| 168 | ALIGN WORD_ALIGN
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| 169 | .rgwItemTypeRefresh:
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| 170 | istruc ITEM_TYPE_REFRESH
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| 171 | at ITEM_TYPE_REFRESH.HardDisk, dw BootMenuPrint_HardDiskMenuitem
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| 172 | at ITEM_TYPE_REFRESH.FloppyDrive, dw BootMenuPrint_FloppyMenuitem
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| 173 | iend
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| 174 | .rgwInformationItemTypeRefresh:
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| 175 | istruc ITEM_TYPE_REFRESH
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| 176 | at ITEM_TYPE_REFRESH.HardDisk, dw BootMenuPrint_HardDiskMenuitemInformation
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| 177 | at ITEM_TYPE_REFRESH.FloppyDrive, dw BootMenuPrint_FloppyMenuitemInformation
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| 178 | iend
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