[3] | 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 | jns SHORT .DoNotSetDefaultMenuitem |
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| 286 | call BootMenu_ConvertDriveToMenuitem |
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| 287 | mov ax, 1 |
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| 288 | ret |
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| 289 | ALIGN JUMP_ALIGN |
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| 290 | .DoNotSetDefaultMenuitem: |
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| 291 | xor ax, ax |
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| 292 | ret |
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