source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Boot/BootMenuEvent.asm@ 290

Last change on this file since 290 was 258, checked in by gregli@…, 13 years ago

Added floppy drive emulation over the serial connection (MODULE_SERIAL_FLOPPY). Along the way, various optimizations were made to stay within the 8K ROM size target. Also, serial code now returns the number of sectors transferred.

File size: 5.3 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.FirstEvent
24 jmp bx
25
26MENUEVENT_InitializeMenuinitFromDSSI equ (BootMenuEvent_Handler.InitializeMenuinitFromDSSI - BootMenuEvent_Handler.FirstEvent)
27MENUEVENT_ExitMenu equ (BootMenuEvent_EventCompleted - BootMenuEvent_Handler.FirstEvent)
28MENUEVENT_ItemHighlightedFromCX equ (BootMenuEvent_Handler.ItemHighlightedFromCX - BootMenuEvent_Handler.FirstEvent)
29MENUEVENT_ItemSelectedFromCX equ (BootMenuEvent_Handler.ItemSelectedFromCX - BootMenuEvent_Handler.FirstEvent)
30MENUEVENT_KeyStrokeInAX equ (BootMenuEvent_Handler.KeyStrokeInAX - BootMenuEvent_Handler.FirstEvent)
31MENUEVENT_RefreshTitle equ (BootMenuPrint_TitleStrings - BootMenuEvent_Handler.FirstEvent)
32MENUEVENT_RefreshInformation equ (BootMenuPrint_RefreshInformation - BootMenuEvent_Handler.FirstEvent)
33MENUEVENT_RefreshItemFromCX equ (BootMenuPrint_RefreshItem - BootMenuEvent_Handler.FirstEvent)
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.FirstEvent:
70.InitializeMenuinitFromDSSI:
71 push ds
72 call RamVars_GetSegmentToDS
73 call .GetDefaultMenuitemToDX
74 call BootMenu_GetMenuitemCountToAX
75 pop ds
76 mov [si+MENUINIT.wItems], ax
77 mov [si+MENUINIT.wHighlightedItem], dx
78 mov WORD [si+MENUINIT.wTitleAndInfoLines], BOOT_MENU_TITLE_AND_INFO_LINES
79 mov BYTE [si+MENUINIT.bWidth], BOOT_MENU_WIDTH
80 call BootMenu_GetHeightToAHwithItemCountInAL
81 mov [si+MENUINIT.bHeight], ah
82 mov ax, [cs:ROMVARS.wBootTimeout]
83 CALL_MENU_LIBRARY StartSelectionTimeoutWithTicksInAX
84 stc
85 ret
86
87ALIGN JUMP_ALIGN
88.GetDefaultMenuitemToDX:
89 mov dl, [cs:ROMVARS.bBootDrv] ; Default boot drive
90 call BootMenu_IsDriveInSystem
91 jnc SHORT .DoNotSetDefaultMenuitem
92 call DriveXlate_SetDriveToSwap
93 jmp BootMenu_GetMenuitemToDXforDriveInDL
94ALIGN JUMP_ALIGN
95.DoNotSetDefaultMenuitem:
96 xor dx, dx ; Whatever appears first on boot menu
97 ret
98
99
100; Parameters:
101; CX: Index of new highlighted item
102; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED
103ALIGN JUMP_ALIGN
104.ItemHighlightedFromCX:
105 push cx
106 call BootMenu_GetDriveToDXforMenuitemInCX_And_RamVars_GetSegmentToDS
107 call DriveXlate_Reset
108 call DriveXlate_SetDriveToSwap
109
110 xor ax, ax ; Update first floppy drive (for translated drive number)
111 CALL_MENU_LIBRARY RefreshItemFromAX
112 mov dl, 80h
113 call BootMenu_GetMenuitemToDXforDriveInDL
114 xchg ax, dx ; Update first hard disk (for translated drive number)
115 CALL_MENU_LIBRARY RefreshItemFromAX
116 pop ax ; Update new item (for translated drive number)
117 CALL_MENU_LIBRARY RefreshItemFromAX
118 CALL_MENU_LIBRARY RefreshInformation
119 stc
120 ret
121
122
123; Parameters:
124; AL: ASCII character for the key
125; AH: Keyboard library scan code for the key
126ALIGN JUMP_ALIGN
127.KeyStrokeInAX:
128 cmp ah, ROM_BOOT_HOTKEY_SCANCODE
129 jne SHORT .CheckDriveHotkeys
130 ;; NOTE: carry flag will be clear after compare above that resulted in zero
131 jmp Int19hMenu_JumpToBootSector_or_RomBoot
132ALIGN JUMP_ALIGN
133.CheckDriveHotkeys:
134 call BootMenu_GetMenuitemToAXforAsciiHotkeyInAL
135 cmp ax, [bp+MENUINIT.wItems]
136 jae SHORT BootMenuEvent_EventCompleted ; Invalid key
137
138 ; Highlighting new item resets drive translation and we do not want that.
139 ; We must be able to translate both floppy drive and hard drive when using hotkey.
140 call RamVars_GetSegmentToDS
141 mov dx, [RAMVARS.xlateVars+XLATEVARS.wFDandHDswap]
142 CALL_MENU_LIBRARY HighlightItemFromAX
143 or [RAMVARS.xlateVars+XLATEVARS.wFDandHDswap], dx
144 ; Fall to .ItemSelectedFromCX
145
146
147; Parameters:
148; CX: Index of selected item
149ALIGN JUMP_ALIGN
150.ItemSelectedFromCX:
151 CALL_MENU_LIBRARY Close
152
153BootMenuEvent_EventCompleted:
154 stc
155 ret
156
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