| 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 | .SpecialFunction resb 2
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| 11 | endstruc
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| 12 |
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| 13 |
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| 14 | ;--------------------------------------------------------------------
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| 15 | ; BootMenuEvent_Handler
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| 16 | ; Common parameters for all events:
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| 17 | ; BX: Menu event (anything from MENUEVENT struct)
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| 18 | ; SS:BP: Menu library handle
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| 19 | ; Common return values for all events:
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| 20 | ; CF: Set if event processed
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| 21 | ; Cleared if event not processed
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| 22 | ; Corrupts registers:
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| 23 | ; All
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| 24 | ;--------------------------------------------------------------------
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| 25 | ALIGN JUMP_ALIGN
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| 26 | BootMenuEvent_Handler:
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| 27 | cmp bx, MENUEVENT.RefreshItemFromCX ; Above last supported item?
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| 28 | ja SHORT .EventNotHandled
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| 29 | jmp [bx+.rgfnEventSpecificHandlers]
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| 30 | .EventNotHandled:
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| 31 | .IdleProcessing:
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| 32 | clc
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| 33 | ret
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| 34 |
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| 35 | ALIGN WORD_ALIGN
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| 36 | .rgfnEventSpecificHandlers:
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| 37 | dw .InitializeMenuinitFromDSSI
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| 38 | dw .EventCompleted
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| 39 | dw .IdleProcessing
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| 40 | dw .ItemHighlightedFromCX
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| 41 | dw .ItemSelectedFromCX
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| 42 | dw .KeyStrokeInAX
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| 43 | dw BootMenuPrint_TitleStrings
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| 44 | dw .RefreshInformation
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| 45 | dw .RefreshItemFromCX
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| 46 |
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| 47 |
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| 48 | ; Parameters:
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| 49 | ; DS:SI: Ptr to MENUINIT struct to initialize
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| 50 | ; Returns:
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| 51 | ; DS:SI: Ptr to initialized MENUINIT struct
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| 52 | ALIGN JUMP_ALIGN
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| 53 | .InitializeMenuinitFromDSSI:
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| 54 | push ds
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| 55 | call RamVars_GetSegmentToDS
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| 56 | call .GetDefaultMenuitemToDX
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| 57 | call BootMenu_GetMenuitemCountToCX
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| 58 | pop ds
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| 59 | mov [si+MENUINIT.wItems], cx
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| 60 | mov [si+MENUINIT.wHighlightedItem], dx
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| 61 | mov WORD [si+MENUINIT.wTitleAndInfoLines], BOOT_MENU_TITLE_AND_INFO_LINES
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| 62 | mov BYTE [si+MENUINIT.bWidth], BOOT_MENU_WIDTH
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| 63 | call BootMenu_GetHeightToAHwithItemCountInCL
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| 64 | mov [si+MENUINIT.bHeight], ah
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| 65 | stc
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| 66 | ret
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| 67 |
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| 68 | ALIGN JUMP_ALIGN
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| 69 | .GetDefaultMenuitemToDX:
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| 70 | mov dl, [cs:ROMVARS.bBootDrv] ; Default boot drive
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| 71 | call BootMenu_IsDriveInSystem
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| 72 | jnc SHORT .DoNotSetDefaultMenuitem
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| 73 | call DriveXlate_SetDriveToSwap
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| 74 | call BootMenu_ConvertDriveToMenuitem
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| 75 | mov dx, cx
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| 76 | ret
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| 77 | ALIGN JUMP_ALIGN
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| 78 | .DoNotSetDefaultMenuitem:
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| 79 | xor dx, dx ; Whatever appears first on boot menu
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| 80 | ret
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| 81 |
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| 82 |
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| 83 | ; Parameters:
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| 84 | ; CX: Index of new highlighted item
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| 85 | ; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED
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| 86 | ALIGN JUMP_ALIGN
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| 87 | .ItemHighlightedFromCX:
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| 88 | push cx
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| 89 | push dx
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| 90 | call RamVars_GetSegmentToDS
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| 91 | call DriveXlate_Reset
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| 92 | call BootMenu_ConvertMenuitemToDriveOrFunction
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| 93 | jc SHORT .UpdatePreviousAndNewMenuitem ; Selection changed to a function
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| 94 | call DriveXlate_SetDriveToSwap
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| 95 |
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| 96 | .UpdatePreviousAndNewMenuitem:
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| 97 | pop ax ; Update previous item
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| 98 | CALL_MENU_LIBRARY RefreshItemFromAX
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| 99 | pop ax ; Update new item
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| 100 | CALL_MENU_LIBRARY RefreshItemFromAX
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| 101 | CALL_MENU_LIBRARY RefreshInformation
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| 102 | stc
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| 103 | ret
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| 104 |
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| 105 |
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| 106 | ; Parameters:
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| 107 | ; AL: ASCII character for the key
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| 108 | ; AH: Keyboard library scan code for the key
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| 109 | ALIGN JUMP_ALIGN
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| 110 | .KeyStrokeInAX:
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| 111 | xor ah, ah ; ASCII drive letter now in AX
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| 112 | call BootMenu_ConvertHotkeyToMenuitem
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| 113 | cmp cx, [bp+MENUINIT.wItems]
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| 114 | jae SHORT .EventNotHandled ; Invalid key
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| 115 | xchg ax, cx
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| 116 | CALL_MENU_LIBRARY HighlightItemFromAX
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| 117 | ; Fall to .ItemSelectedFromCX
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| 118 |
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| 119 |
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| 120 | ; Parameters:
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| 121 | ; CX: Index of selected item
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| 122 | ALIGN JUMP_ALIGN
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| 123 | .ItemSelectedFromCX:
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| 124 | CALL_MENU_LIBRARY Close
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| 125 | .EventCompleted:
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| 126 | stc
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| 127 | ret
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| 128 |
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| 129 |
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| 130 | ; Parameters:
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| 131 | ; CX: Index of item to refresh
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| 132 | ; Cursor has been positioned to the beginning of item line
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| 133 | ALIGN JUMP_ALIGN
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| 134 | .RefreshItemFromCX:
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| 135 | mov bx, .rgwItemTypeRefresh
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| 136 | jmp SHORT .RefreshItemOrInformationWithJumpTableInCSBX
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| 137 |
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| 138 |
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| 139 | ; Parameters:
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| 140 | ; CX: Index of highlighted item
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| 141 | ; Cursor has been positioned to the beginning of first line
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| 142 | ALIGN JUMP_ALIGN
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| 143 | .RefreshInformation:
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| 144 | mov bx, .rgwInformationItemTypeRefresh
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| 145 | ; Fall to .RefreshItemOrInformationWithJumpTableInCSBX
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| 146 |
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| 147 | ;--------------------------------------------------------------------
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| 148 | ; RefreshItemOrInformationWithJumpTableInCSBX
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| 149 | ; Parameters:
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| 150 | ; CX: Index of selected menuitem
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| 151 | ; CS:BX: Ptr to ITEM_TYPE_REFRESH jump table
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| 152 | ; Returns:
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| 153 | ; CF: set since event processed
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| 154 | ;--------------------------------------------------------------------
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| 155 | ALIGN JUMP_ALIGN
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| 156 | .RefreshItemOrInformationWithJumpTableInCSBX:
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| 157 | cmp cl, NO_ITEM_HIGHLIGHTED
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| 158 | je SHORT .EventCompleted
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| 159 |
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| 160 | call RamVars_GetSegmentToDS
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| 161 | call BootMenu_ConvertMenuitemToDriveOrFunction
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| 162 | jc SHORT .DrawFunction
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| 163 | test dl, 80h ; Floppy drive?
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| 164 | jz SHORT .DrawFloppyDrive
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| 165 | jmp [cs:bx+ITEM_TYPE_REFRESH.HardDisk]
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| 166 | ALIGN JUMP_ALIGN
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| 167 | .DrawFunction:
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| 168 | jmp [cs:bx+ITEM_TYPE_REFRESH.SpecialFunction]
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| 169 | ALIGN JUMP_ALIGN
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| 170 | .DrawFloppyDrive:
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| 171 | jmp [cs:bx+ITEM_TYPE_REFRESH.FloppyDrive]
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| 172 |
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| 173 | ; Jump tables for .RefreshItemOrInformationWithJumpTableInCSBX
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| 174 | ALIGN WORD_ALIGN
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| 175 | .rgwItemTypeRefresh:
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| 176 | istruc ITEM_TYPE_REFRESH
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| 177 | at ITEM_TYPE_REFRESH.HardDisk, dw BootMenuPrint_HardDiskMenuitem
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| 178 | at ITEM_TYPE_REFRESH.FloppyDrive, dw BootMenuPrint_FloppyMenuitem
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| 179 | at ITEM_TYPE_REFRESH.SpecialFunction, dw BootMenuPrint_FunctionMenuitem
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| 180 | iend
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| 181 | .rgwInformationItemTypeRefresh:
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| 182 | istruc ITEM_TYPE_REFRESH
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| 183 | at ITEM_TYPE_REFRESH.HardDisk, dw BootMenuPrint_HardDiskMenuitemInformation
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| 184 | at ITEM_TYPE_REFRESH.FloppyDrive, dw BootMenuPrint_FloppyMenuitemInformation
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| 185 | at ITEM_TYPE_REFRESH.SpecialFunction, dw BootMenuPrint_ClearInformationArea
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| 186 | iend
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