| 1 | ; File name : BootMenuEvent.asm
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| 2 | ; Project name : IDE BIOS
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| 3 | ; Created date : 26.3.2010
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| 4 | ; Last update : 1.4.2010
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| 5 | ; Author : Tomi Tilli
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| 6 | ; Description : Boot Menu event handler for menu library callbacks.
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| 7 |
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| 8 | ; Section containing code
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| 9 | SECTION .text
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| 10 |
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| 11 | ;--------------------------------------------------------------------
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| 12 | ; Boot Menu event handler.
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| 13 | ;
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| 14 | ; BootMenuEvent_Handler
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| 15 | ; Parameters:
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| 16 | ; BX: Callback event
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| 17 | ; CX: Menuitem index (usually index of selected Menuitem)
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| 18 | ; DX: Event parameter (event specific)
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| 19 | ; SS:BP: Ptr to MENUVARS
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| 20 | ; Returns:
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| 21 | ; AH: Event specific or unused. Set to 0 if unused.
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| 22 | ; AL: 1=Event processed
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| 23 | ; 0=Event not processed (default action if any)
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| 24 | ; Corrupts registers:
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| 25 | ; BX, CX, DX
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| 26 | ;--------------------------------------------------------------------
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| 27 | ALIGN JUMP_ALIGN
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| 28 | BootMenuEvent_Handler:
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| 29 | push es
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| 30 | push ds
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| 31 | push di
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| 32 | push si
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| 33 |
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| 34 | xor ax, ax ; Event not processed
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| 35 | cmp bx, BYTE EVNT_MNU_GETDEF ; Event in jump table?
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| 36 | ja SHORT .Return
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| 37 | shl bx, 1
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| 38 | call [cs:bx+.rgwEventJmp]
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| 39 | .Return:
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| 40 | pop si
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| 41 | pop di
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| 42 | pop ds
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| 43 | pop es
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| 44 | ret
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| 45 | ALIGN WORD_ALIGN
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| 46 | .rgwEventJmp:
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| 47 | dw BootMenuEvent_Exit ; 0, EVNT_MNU_EXIT (Menu will quit)
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| 48 | dw BootMenuEvent_EventItemSelectionChanged ; 1, EVNT_MMU_SELCHG (Menuitem selection changed (with arrows))
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| 49 | dw BootMenuEvent_EventItemSelected ; 2, EVNT_MNU_SELSET (Menuitem selected (with Enter))
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| 50 | dw BootMenuEvent_EventKeyPressed ; 3, EVNT_MNU_KEY (Keyboard key pressed)
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| 51 | dw BootMenuEvent_EventMenuDraw ; 4, EVNT_MNU_UPD (Menu needs to be updated)
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| 52 | dw BootMenuEvent_EventGetDefaultMenuitem ; 5, EVNT_MNU_GETDEF (Request menuitem to be selected by default)
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| 53 |
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| 54 |
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| 55 | ;--------------------------------------------------------------------
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| 56 | ; Boot Menu event handler.
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| 57 | ; Handles Menu Exit notification (EVNT_MNU_EXIT).
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| 58 | ;
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| 59 | ; BootMenuEvent_Exit
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| 60 | ; Parameters:
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| 61 | ; SS:BP: Ptr to MENUVARS
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| 62 | ; Returns:
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| 63 | ; AH: 1 to cancel exit
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| 64 | ; 0 to allow menu exit
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| 65 | ; AL: 1 = Event processed
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| 66 | ; Corrupts registers:
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| 67 | ; Nothing
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| 68 | ;--------------------------------------------------------------------
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| 69 | ALIGN JUMP_ALIGN
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| 70 | BootMenuEvent_Exit:
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| 71 | mov ax, 1 ; Event handled
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| 72 | ret
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| 73 |
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| 74 |
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| 75 | ;--------------------------------------------------------------------
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| 76 | ; Boot Menu event handler.
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| 77 | ; Handles Menuitem Selection Changed notification (EVNT_MMU_SELCHG).
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| 78 | ;
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| 79 | ; BootMenuEvent_EventItemSelectionChanged
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| 80 | ; Parameters:
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| 81 | ; CX: Index of selected Menuitem
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| 82 | ; SS:BP: Ptr to MENUVARS
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| 83 | ; Returns:
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| 84 | ; AX: 1 = Event processed
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| 85 | ; Corrupts registers:
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| 86 | ; BX, CX, DX, DI
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| 87 | ;--------------------------------------------------------------------
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| 88 | ALIGN JUMP_ALIGN
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| 89 | BootMenuEvent_EventItemSelectionChanged:
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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 BootMenuEvent_UpdateAllMenuitems ; Selection changed to a function
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| 94 | call DriveXlate_SetDriveToSwap
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| 95 | ; Fall to BootMenuEvent_UpdateAllMenuitems
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| 96 |
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| 97 | ;--------------------------------------------------------------------
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| 98 | ; Redraws all menuitems.
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| 99 | ;
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| 100 | ; BootMenuEvent_UpdateAllMenuitems
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| 101 | ; Parameters:
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| 102 | ; SS:BP: Ptr to MENUVARS
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| 103 | ; Returns:
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| 104 | ; AX: 1 = Event processed
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| 105 | ; Corrupts registers:
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| 106 | ; BX, CX, DX
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| 107 | ;--------------------------------------------------------------------
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| 108 | ALIGN JUMP_ALIGN
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| 109 | BootMenuEvent_UpdateAllMenuitems:
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| 110 | mov cx, -1 ; Update all items
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| 111 | mov dl, MFL_UPD_ITEM | MFL_UPD_NFO | MFL_UPD_NOCLEAR
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| 112 | call Menu_Invalidate
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| 113 | mov ax, 1 ; Event handled
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| 114 | ret
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| 115 |
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| 116 |
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| 117 | ;--------------------------------------------------------------------
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| 118 | ; Boot Menu event handler.
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| 119 | ; Handles Menuitem Selected notification (EVNT_MNU_SELSET).
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| 120 | ;
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| 121 | ; BootMenuEvent_EventItemSelected
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| 122 | ; Parameters:
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| 123 | ; CX: Index of selected Menuitem
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| 124 | ; SS:BP: Ptr to MENUVARS
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| 125 | ; Returns:
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| 126 | ; AX: 1 = Event processed
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| 127 | ; Corrupts registers:
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| 128 | ; BX, CX, DX
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| 129 | ;--------------------------------------------------------------------
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| 130 | ALIGN JUMP_ALIGN
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| 131 | BootMenuEvent_EventItemSelected:
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| 132 | call Menu_Exit ; Exit from menu
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| 133 | mov ax, 1 ; Event handled
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| 134 | ret
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| 135 |
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| 136 |
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| 137 | ;--------------------------------------------------------------------
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| 138 | ; Boot Menu event handler.
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| 139 | ; Handles Key pressed notification (EVNT_MNU_KEY).
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| 140 | ;
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| 141 | ; BootMenuEvent_EventKeyPressed
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| 142 | ; Parameters:
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| 143 | ; CX: Index of currently selected Menuitem
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| 144 | ; DL: ASCII character
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| 145 | ; DH: BIOS Scan Code
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| 146 | ; SS:BP: Ptr to MENUVARS
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| 147 | ; Returns:
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| 148 | ; AX: 1 = Event processed
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| 149 | ; Corrupts registers:
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| 150 | ; BX, CX, DX, DS
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| 151 | ;--------------------------------------------------------------------
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| 152 | ALIGN JUMP_ALIGN
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| 153 | BootMenuEvent_EventKeyPressed:
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| 154 | mov al, dl ; Copy ASCII char to AL
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| 155 | sub al, 'a'-'A' ; To upper case character
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| 156 | cmp al, 'A' ; First possible drive letter?
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| 157 | jb SHORT .Return ; If below, return
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| 158 | cmp al, 'Z' ; Last possible drive letter?
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| 159 | ja SHORT .Return ; If above, return
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| 160 | LOAD_BDA_SEGMENT_TO ds, dx
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| 161 | mov [BOOTVARS.bMenuHotkey], al
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| 162 | jmp SHORT BootMenuEvent_EventItemSelected
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| 163 | .Return:
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| 164 | mov ax, 1
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| 165 | ret
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| 166 |
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| 167 |
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| 168 | ;--------------------------------------------------------------------
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| 169 | ; Boot Menu event handler.
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| 170 | ; Handles Menu Update notification (EVNT_MNU_UPD).
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| 171 | ;
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| 172 | ; BootMenuEvent_EventMenuDraw
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| 173 | ; Parameters:
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| 174 | ; CX: Index of Menuitem to update (if MFL_UPD_ITEM set)
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| 175 | ; DL: Update flag (only one):
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| 176 | ; MFL_UPD_TITLE Update Menu Title string(s)
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| 177 | ; MFL_UPD_NFO Update Menu Info string(s)
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| 178 | ; MFL_UPD_ITEM Update Menuitem string
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| 179 | ; SS:BP: Ptr to MENUVARS
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| 180 | ; Returns:
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| 181 | ; AX: Was event processed
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| 182 | ; Corrupts registers:
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| 183 | ; BX, CX, DX, SI, DI, DS
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| 184 | ;--------------------------------------------------------------------
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| 185 | ALIGN JUMP_ALIGN
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| 186 | BootMenuEvent_EventMenuDraw:
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| 187 | test dl, MFL_UPD_ITEM ; Need to update Menuitem?
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| 188 | jnz SHORT BootMenuEvent_DrawMenuitem
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| 189 | test dl, MFL_UPD_NFO ; Need to update Info String(s)?
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| 190 | jnz SHORT BootMenuEvent_DrawInfo
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| 191 | test dl, MFL_UPD_TITLE ; Need to update Title String(s)?
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| 192 | jnz SHORT BootMenuEvent_DrawTitle
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| 193 | xor ax, ax
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| 194 | ret
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| 195 |
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| 196 | ;--------------------------------------------------------------------
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| 197 | ; Draws Menuitem string. Cursor is set to a menuitem location.
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| 198 | ;
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| 199 | ; BootMenuEvent_DrawMenuitem
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| 200 | ; Parameters:
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| 201 | ; CX: Index of Menuitem to draw
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| 202 | ; SS:BP: Ptr to MENUVARS
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| 203 | ; Returns:
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| 204 | ; AX: Was event processed
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| 205 | ; Corrupts registers:
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| 206 | ; BX, CX, DX, SI, DI, DS, ES
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| 207 | ;--------------------------------------------------------------------
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| 208 | ALIGN JUMP_ALIGN
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| 209 | BootMenuEvent_DrawMenuitem:
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| 210 | call RamVars_GetSegmentToDS
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| 211 | call BootMenu_ConvertMenuitemToDriveOrFunction
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| 212 | jc SHORT .DrawFunctionItem
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| 213 | call BootMenuPrint_TranslatedDriveNumber
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| 214 | test dl, 80h ; Floppy drive?
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| 215 | jz SHORT .DrawFloppyDriveItem
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| 216 | jmp BootMenuPrint_HardDiskMenuitem
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| 217 | ALIGN JUMP_ALIGN
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| 218 | .DrawFunctionItem:
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| 219 | jmp BootMenuPrint_FunctionMenuitem
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| 220 | ALIGN JUMP_ALIGN
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| 221 | .DrawFloppyDriveItem:
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| 222 | jmp BootMenuPrint_FloppyMenuitem
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| 223 |
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| 224 | ;--------------------------------------------------------------------
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| 225 | ; Draws information strings. Cursor is set to a first information line.
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| 226 | ;
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| 227 | ; BootMenuEvent_DrawInfo
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| 228 | ; Parameters:
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| 229 | ; CX: Index of selected menuitem
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| 230 | ; SS:BP: Ptr to MENUVARS
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| 231 | ; Returns:
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| 232 | ; AX: Was event processed
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| 233 | ; Corrupts registers:
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| 234 | ; BX, CX, DX, SI, DI, DS, ES
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| 235 | ;--------------------------------------------------------------------
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| 236 | ALIGN JUMP_ALIGN
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| 237 | BootMenuEvent_DrawInfo:
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| 238 | call RamVars_GetSegmentToDS
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| 239 | call BootMenu_ConvertMenuitemToDriveOrFunction
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| 240 | jc SHORT .DrawFunctionInfo
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| 241 | test dl, 80h ; Floppy drive?
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| 242 | jz SHORT .DrawFloppyDriveInfo
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| 243 | jmp BootMenuPrint_HardDiskMenuitemInformation
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| 244 | ALIGN JUMP_ALIGN
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| 245 | .DrawFunctionInfo:
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| 246 | jmp BootMenuPrint_FunctionMenuitemInformation
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| 247 | ALIGN JUMP_ALIGN
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| 248 | .DrawFloppyDriveInfo:
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| 249 | jmp BootMenuPrint_FloppyMenuitemInformation
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| 250 |
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| 251 | ;--------------------------------------------------------------------
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| 252 | ; Draws title strings. Cursor is set to a first title line.
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| 253 | ;
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| 254 | ; BootMenuEvent_DrawTitle
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| 255 | ; Parameters:
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| 256 | ; SS:BP: Ptr to MENUVARS
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| 257 | ; Returns:
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| 258 | ; AX: Was event processed
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| 259 | ; Corrupts registers:
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| 260 | ; CX, DX, SI
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| 261 | ;--------------------------------------------------------------------
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| 262 | ALIGN JUMP_ALIGN
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| 263 | BootMenuEvent_DrawTitle:
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| 264 | jmp BootMenuPrint_TitleStrings
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| 265 |
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| 266 |
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| 267 | ;--------------------------------------------------------------------
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| 268 | ; Boot Menu event handler.
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| 269 | ; Handles Get Default Menuitem notification (EVNT_MNU_GETDEF).
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| 270 | ;
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| 271 | ; BootMenuEvent_EventGetDefaultMenuitem
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| 272 | ; Parameters:
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| 273 | ; SS:BP: Ptr to MENUVARS
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| 274 | ; Returns:
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| 275 | ; AX: Was event processed
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| 276 | ; CX: Index of menuitem to set selected
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| 277 | ; Corrupts registers:
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| 278 | ; BX, CX, DX, DI, DS
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| 279 | ;--------------------------------------------------------------------
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| 280 | ALIGN JUMP_ALIGN
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| 281 | BootMenuEvent_EventGetDefaultMenuitem:
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| 282 | call RamVars_GetSegmentToDS
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| 283 | mov dl, [cs:ROMVARS.bBootDrv] ; Default boot drive
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| 284 | call BootMenu_IsDriveInSystem
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| 285 | jnc SHORT .DoNotSetDefaultMenuitem
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| 286 | call DriveXlate_SetDriveToSwap
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| 287 | call BootMenu_ConvertDriveToMenuitem
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| 288 | mov ax, 1
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| 289 | ret
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| 290 | ALIGN JUMP_ALIGN
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| 291 | .DoNotSetDefaultMenuitem:
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| 292 | xor ax, ax
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| 293 | ret
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