| [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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| [88] | 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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| [3] | 14 | ;--------------------------------------------------------------------
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| 15 | ; BootMenuEvent_Handler
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| [88] | 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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| [3] | 22 | ; Corrupts registers:
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| [88] | 23 | ; All
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| [3] | 24 | ;--------------------------------------------------------------------
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| 25 | ALIGN JUMP_ALIGN
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| 26 | BootMenuEvent_Handler:
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| [88] | 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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| [3] | 34 |
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| 35 | ALIGN WORD_ALIGN
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| [88] | 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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| [3] | 46 |
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| 47 |
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| [88] | 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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| [3] | 52 | ALIGN JUMP_ALIGN
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| [88] | 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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| [92] | 64 | sub ah, MENU_SCREEN_BOTTOM_LINES*2
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| [88] | 65 | mov [si+MENUINIT.bHeight], ah
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| 66 | stc
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| [3] | 67 | ret
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| 68 |
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| [88] | 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 | call BootMenu_ConvertDriveToMenuitem
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| 76 | mov dx, cx
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| 77 | ret
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| 78 | ALIGN JUMP_ALIGN
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| 79 | .DoNotSetDefaultMenuitem:
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| 80 | xor dx, dx ; Whatever appears first on boot menu
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| 81 | ret
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| [3] | 82 |
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| [88] | 83 |
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| 84 | ; Parameters:
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| 85 | ; CX: Index of new highlighted item
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| 86 | ; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED
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| [3] | 87 | ALIGN JUMP_ALIGN
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| [88] | 88 | .ItemHighlightedFromCX:
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| 89 | push cx
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| 90 | push dx
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| [3] | 91 | call RamVars_GetSegmentToDS
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| 92 | call DriveXlate_Reset
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| [92] | 93 | call BootMenu_ConvertMenuitemFromCXtoDriveInDX
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| [3] | 94 | call DriveXlate_SetDriveToSwap
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| [88] | 95 | pop ax ; Update previous item
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| 96 | CALL_MENU_LIBRARY RefreshItemFromAX
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| 97 | pop ax ; Update new item
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| 98 | CALL_MENU_LIBRARY RefreshItemFromAX
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| 99 | CALL_MENU_LIBRARY RefreshInformation
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| 100 | stc
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| [3] | 101 | ret
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| 102 |
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| 103 |
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| [88] | 104 | ; Parameters:
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| 105 | ; AL: ASCII character for the key
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| 106 | ; AH: Keyboard library scan code for the key
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| [3] | 107 | ALIGN JUMP_ALIGN
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| [88] | 108 | .KeyStrokeInAX:
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| [92] | 109 | cmp ah, ROM_BOOT_HOTKEY_SCANCODE
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| 110 | jne SHORT .CheckDriveHotkeys
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| 111 | int INTV_BOOT_FAILURE ; ROM Boot, never returns
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| 112 | ALIGN JUMP_ALIGN
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| 113 | .CheckDriveHotkeys:
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| 114 | call BootMenu_ConvertAsciiHotkeyFromALtoMenuitemInCX
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| [88] | 115 | cmp cx, [bp+MENUINIT.wItems]
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| [92] | 116 | jae SHORT .EventCompleted ; Invalid key
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| [88] | 117 | xchg ax, cx
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| 118 | CALL_MENU_LIBRARY HighlightItemFromAX
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| 119 | ; Fall to .ItemSelectedFromCX
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| [3] | 120 |
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| 121 |
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| [88] | 122 | ; Parameters:
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| 123 | ; CX: Index of selected item
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| [3] | 124 | ALIGN JUMP_ALIGN
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| [88] | 125 | .ItemSelectedFromCX:
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| 126 | CALL_MENU_LIBRARY Close
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| 127 | .EventCompleted:
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| 128 | stc
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| [3] | 129 | ret
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| 130 |
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| 131 |
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| [88] | 132 | ; Parameters:
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| 133 | ; CX: Index of item to refresh
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| 134 | ; Cursor has been positioned to the beginning of item line
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| [3] | 135 | ALIGN JUMP_ALIGN
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| [88] | 136 | .RefreshItemFromCX:
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| 137 | mov bx, .rgwItemTypeRefresh
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| 138 | jmp SHORT .RefreshItemOrInformationWithJumpTableInCSBX
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| [3] | 139 |
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| [88] | 140 |
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| 141 | ; Parameters:
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| 142 | ; CX: Index of highlighted item
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| 143 | ; Cursor has been positioned to the beginning of first line
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| [3] | 144 | ALIGN JUMP_ALIGN
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| [88] | 145 | .RefreshInformation:
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| 146 | mov bx, .rgwInformationItemTypeRefresh
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| 147 | ; Fall to .RefreshItemOrInformationWithJumpTableInCSBX
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| [3] | 148 |
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| 149 | ;--------------------------------------------------------------------
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| [88] | 150 | ; RefreshItemOrInformationWithJumpTableInCSBX
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| [3] | 151 | ; Parameters:
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| 152 | ; CX: Index of selected menuitem
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| [88] | 153 | ; CS:BX: Ptr to ITEM_TYPE_REFRESH jump table
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| [3] | 154 | ; Returns:
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| [88] | 155 | ; CF: set since event processed
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| [3] | 156 | ;--------------------------------------------------------------------
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| 157 | ALIGN JUMP_ALIGN
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| [88] | 158 | .RefreshItemOrInformationWithJumpTableInCSBX:
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| 159 | cmp cl, NO_ITEM_HIGHLIGHTED
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| 160 | je SHORT .EventCompleted
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| 161 |
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| [3] | 162 | call RamVars_GetSegmentToDS
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| [92] | 163 | call BootMenu_ConvertMenuitemFromCXtoDriveInDX
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| [3] | 164 | test dl, 80h ; Floppy drive?
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| [88] | 165 | jz SHORT .DrawFloppyDrive
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| 166 | jmp [cs:bx+ITEM_TYPE_REFRESH.HardDisk]
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| [3] | 167 | ALIGN JUMP_ALIGN
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| [88] | 168 | .DrawFloppyDrive:
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| 169 | jmp [cs:bx+ITEM_TYPE_REFRESH.FloppyDrive]
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| [3] | 170 |
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| [88] | 171 | ; Jump tables for .RefreshItemOrInformationWithJumpTableInCSBX
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| 172 | ALIGN WORD_ALIGN
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| 173 | .rgwItemTypeRefresh:
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| 174 | istruc ITEM_TYPE_REFRESH
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| 175 | at ITEM_TYPE_REFRESH.HardDisk, dw BootMenuPrint_HardDiskMenuitem
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| 176 | at ITEM_TYPE_REFRESH.FloppyDrive, dw BootMenuPrint_FloppyMenuitem
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| 177 | iend
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| 178 | .rgwInformationItemTypeRefresh:
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| 179 | istruc ITEM_TYPE_REFRESH
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| 180 | at ITEM_TYPE_REFRESH.HardDisk, dw BootMenuPrint_HardDiskMenuitemInformation
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| 181 | at ITEM_TYPE_REFRESH.FloppyDrive, dw BootMenuPrint_FloppyMenuitemInformation
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| 182 | iend
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