source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Boot/BootMenuEvent.asm@ 249

Last change on this file since 249 was 248, checked in by aitotat@…, 13 years ago

Changes to XTIDE Universal BIOS:

  • Booting with hotkey now properly maintains FD and HD drive swappings (it is now again possible to boot with both translated FD and HD drives).
  • Had to change file orders so compressed strings could be included after recent changes to Assembly Library size.
File size: 5.2 KB
Line 
1; Project name : XTIDE Universal BIOS
2; Description : Boot Menu event handler for menu library callbacks.
3
4; Section containing code
5SECTION .text
6
7;--------------------------------------------------------------------
8; BootMenuEvent_Handler
9; Common parameters for all events:
10; BX: Menu event (anything from MENUEVENT struct)
11; SS:BP: Menu library handle
12; Common return values for all events:
13; CF: Set if event processed
14; Cleared if event not processed
15; Corrupts registers:
16; All
17;--------------------------------------------------------------------
18ALIGN JUMP_ALIGN
19BootMenuEvent_Handler:
20
21%ifdef MENUEVENT_INLINE_OFFSETS
22
23 add bx, BootMenuEvent_Handler
24 jmp bx
25
26MENUEVENT_InitializeMenuinitFromDSSI equ (BootMenuEvent_Handler.InitializeMenuinitFromDSSI - BootMenuEvent_Handler)
27MENUEVENT_ExitMenu equ (BootMenuEvent_EventCompleted - BootMenuEvent_Handler)
28MENUEVENT_ItemHighlightedFromCX equ (BootMenuEvent_Handler.ItemHighlightedFromCX - BootMenuEvent_Handler)
29MENUEVENT_ItemSelectedFromCX equ (BootMenuEvent_Handler.ItemSelectedFromCX - BootMenuEvent_Handler)
30MENUEVENT_KeyStrokeInAX equ (BootMenuEvent_Handler.KeyStrokeInAX - BootMenuEvent_Handler)
31MENUEVENT_RefreshTitle equ (BootMenuPrint_TitleStrings - BootMenuEvent_Handler)
32MENUEVENT_RefreshInformation equ (BootMenuPrint_RefreshInformation - BootMenuEvent_Handler)
33MENUEVENT_RefreshItemFromCX equ (BootMenuPrint_RefreshItem - BootMenuEvent_Handler)
34;
35; Note that there is no entry for MENUEVENT_IdleProcessing. If MENUEVENT_IDLEPROCESSING_ENABLE is not %defined,
36; then the entry point will not be called (saving memory on this end and at the CALL point).
37;
38
39%else
40
41 cmp bx, BYTE MENUEVENT.RefreshItemFromCX ; Above last supported item?
42 ja SHORT .EventNotHandled
43 jmp [cs:bx+.rgfnEventSpecificHandlers]
44
45.EventNotHandled:
46 clc
47 ret
48
49ALIGN WORD_ALIGN
50.rgfnEventSpecificHandlers:
51 dw .InitializeMenuinitFromDSSI ; MENUEVENT.InitializeMenuinitFromDSSI
52 dw BootMenuEvent_EventCompleted ; MENUEVENT.ExitMenu
53 dw .EventNotHandled ; MENUEVENT.IdleProcessing
54 dw .ItemHighlightedFromCX ; MENUEVENT.ItemHighlightedFromCX
55 dw .ItemSelectedFromCX ; MENUEVENT.ItemSelectedFromCX
56 dw .KeyStrokeInAX ; MENUEVENT.KeyStrokeInAX
57 dw BootMenuPrint_TitleStrings ; MENUEVENT.RefreshTitle
58 dw BootMenuPrint_RefreshInformation ; MENUEVENT.RefreshInformation
59 dw BootMenuPrint_RefreshItem ; MENUEVENT.RefreshItemFromCX
60
61%endif
62
63
64; Parameters:
65; DS:SI: Ptr to MENUINIT struct to initialize
66; Returns:
67; DS:SI: Ptr to initialized MENUINIT struct
68ALIGN JUMP_ALIGN
69.InitializeMenuinitFromDSSI:
70 push ds
71 call RamVars_GetSegmentToDS
72 call .GetDefaultMenuitemToDX
73 call BootMenu_GetMenuitemCountToAX
74 pop ds
75 mov [si+MENUINIT.wItems], ax
76 mov [si+MENUINIT.wHighlightedItem], dx
77 mov WORD [si+MENUINIT.wTitleAndInfoLines], BOOT_MENU_TITLE_AND_INFO_LINES
78 mov BYTE [si+MENUINIT.bWidth], BOOT_MENU_WIDTH
79 call BootMenu_GetHeightToAHwithItemCountInAL
80 mov [si+MENUINIT.bHeight], ah
81 mov ax, [cs:ROMVARS.wBootTimeout]
82 CALL_MENU_LIBRARY StartSelectionTimeoutWithTicksInAX
83 stc
84 ret
85
86ALIGN JUMP_ALIGN
87.GetDefaultMenuitemToDX:
88 mov dl, [cs:ROMVARS.bBootDrv] ; Default boot drive
89 call BootMenu_IsDriveInSystem
90 jnc SHORT .DoNotSetDefaultMenuitem
91 call DriveXlate_SetDriveToSwap
92 jmp BootMenu_GetMenuitemToDXforDriveInDL
93ALIGN JUMP_ALIGN
94.DoNotSetDefaultMenuitem:
95 xor dx, dx ; Whatever appears first on boot menu
96 ret
97
98
99; Parameters:
100; CX: Index of new highlighted item
101; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED
102ALIGN JUMP_ALIGN
103.ItemHighlightedFromCX:
104 push cx
105 call BootMenu_GetDriveToDXforMenuitemInCX_And_RamVars_GetSegmentToDS
106 call DriveXlate_Reset
107 call DriveXlate_SetDriveToSwap
108
109 xor ax, ax ; Update first floppy drive (for translated drive number)
110 CALL_MENU_LIBRARY RefreshItemFromAX
111 mov dl, 80h
112 call BootMenu_GetMenuitemToDXforDriveInDL
113 xchg ax, dx ; Update first hard disk (for translated drive number)
114 CALL_MENU_LIBRARY RefreshItemFromAX
115 pop ax ; Update new item (for translated drive number)
116 CALL_MENU_LIBRARY RefreshItemFromAX
117 CALL_MENU_LIBRARY RefreshInformation
118 stc
119 ret
120
121
122; Parameters:
123; AL: ASCII character for the key
124; AH: Keyboard library scan code for the key
125ALIGN JUMP_ALIGN
126.KeyStrokeInAX:
127 cmp ah, ROM_BOOT_HOTKEY_SCANCODE
128 jne SHORT .CheckDriveHotkeys
129 ;; NOTE: carry flag will be clear after compare above that resulted in zero
130 jmp Int19hMenu_JumpToBootSector_or_RomBoot
131ALIGN JUMP_ALIGN
132.CheckDriveHotkeys:
133 call BootMenu_GetMenuitemToAXforAsciiHotkeyInAL
134 cmp ax, [bp+MENUINIT.wItems]
135 jae SHORT BootMenuEvent_EventCompleted ; Invalid key
136
137 ; Highlighting new item resets drive translation and we do not want that.
138 ; We must be able to translate both floppy drive and hard drive when using hotkey.
139 call RamVars_GetSegmentToDS
140 mov dx, [RAMVARS.xlateVars+XLATEVARS.wFDandHDswap]
141 CALL_MENU_LIBRARY HighlightItemFromAX
142 or [RAMVARS.xlateVars+XLATEVARS.wFDandHDswap], dx
143 ; Fall to .ItemSelectedFromCX
144
145
146; Parameters:
147; CX: Index of selected item
148ALIGN JUMP_ALIGN
149.ItemSelectedFromCX:
150 CALL_MENU_LIBRARY Close
151
152BootMenuEvent_EventCompleted:
153 stc
154 ret
155
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