| 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : Boot Menu event handler for menu library callbacks.
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| 3 |
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| 4 | ;
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| 5 | ; XTIDE Universal BIOS and Associated Tools
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
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| 7 | ;
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| 8 | ; This program is free software; you can redistribute it and/or modify
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| 9 | ; it under the terms of the GNU General Public License as published by
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| 10 | ; the Free Software Foundation; either version 2 of the License, or
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| 11 | ; (at your option) any later version.
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| 12 | ;
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| 13 | ; This program is distributed in the hope that it will be useful,
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | ; GNU General Public License for more details.
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| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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| 18 | ;
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| 19 |
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| 20 | ; Section containing code
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| 21 | SECTION .text
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| 22 |
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| 23 |
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| 24 | ;--------------------------------------------------------------------
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| 25 | ; GetDefaultMenuitemToDL
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| 26 | ; Parameters:
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| 27 | ; DL: Drive number
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| 28 | ; ES: Ptr to BDA (zero)
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| 29 | ; Returns:
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| 30 | ; DL: Menuitem index (assuming drive is available)
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| 31 | ; Corrupts registers:
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| 32 | ; AX, DH
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| 33 | ;--------------------------------------------------------------------
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| 34 | GetDefaultMenuitemToDX:
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| 35 | mov dx, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.wHddAndFddLetters]
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| 36 | test BYTE [es:BOOTVARS.hotkeyVars+HOTKEYVARS.bFlags], FLG_HOTKEY_HD_FIRST
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| 37 | eCMOVZ dl, dh
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| 38 | call IsDriveDLinSystem
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| 39 | jnc SHORT DoNotSetDefaultMenuitem
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| 40 | call DriveXlate_SetDriveToSwap
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| 41 | ; Fall to GetMenuitemToDXforDriveInDL
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| 42 |
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| 43 |
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| 44 | ;--------------------------------------------------------------------
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| 45 | ; GetMenuitemToDXforDriveInDL
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| 46 | ; Parameters:
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| 47 | ; DL: Drive number
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| 48 | ; Returns:
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| 49 | ; DX: Menuitem index (assuming drive is available)
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| 50 | ; Corrupts registers:
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| 51 | ; AX
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| 52 | ;--------------------------------------------------------------------
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| 53 | GetMenuitemToDXforDriveInDL:
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| 54 | xor dh, dh ; Drive number now in DX
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| 55 | test dl, dl
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| 56 | jns SHORT .ReturnItemIndexInDX ; Return if floppy drive (HD bit not set)
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| 57 | call FloppyDrive_GetCountToAX
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| 58 | and dl, ~80h ; Clear HD bit
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| 59 | add dx, ax
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| 60 | .ReturnItemIndexInDX:
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| 61 | ret
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| 62 |
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| 63 |
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| 64 | ;--------------------------------------------------------------------
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| 65 | ; IsDriveDLinSystem
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| 66 | ; Parameters:
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| 67 | ; DL: Drive number
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| 68 | ; DS: RAMVARS segment
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| 69 | ; Returns:
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| 70 | ; CF: Set if drive number is valid
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| 71 | ; Clear if drive is not present in system
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| 72 | ; Corrupts registers:
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| 73 | ; AX, CX
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| 74 | ;--------------------------------------------------------------------
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| 75 | IsDriveDLinSystem:
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| 76 | test dl, dl ; Floppy drive?
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| 77 | jns SHORT .IsFloppyDriveInSystem
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| 78 | call RamVars_GetHardDiskCountFromBDAtoAX ; Hard Disk count to AX
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| 79 | or al, 80h ; Set Hard Disk bit to AX
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| 80 | jmp SHORT .CompareDriveNumberToDriveCount
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| 81 | .IsFloppyDriveInSystem:
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| 82 | call FloppyDrive_GetCountToAX
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| 83 | .CompareDriveNumberToDriveCount:
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| 84 | cmp dl, al ; Set CF when DL is smaller
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| 85 | ret
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| 86 |
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| 87 |
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| 88 | ;--------------------------------------------------------------------
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| 89 | ; ConvertKeystrokeToAXfromDriveLetterInDL
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| 90 | ; Parameters:
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| 91 | ; DL: Drive Letter ('A'...)
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| 92 | ; Returns:
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| 93 | ; AX: Hotkey keystroke
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| 94 | ; Corrupts registers:
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| 95 | ; Nothing
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| 96 | ;--------------------------------------------------------------------
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| 97 | ConvertKeystrokeToAXfromDriveLetterInDL:
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| 98 | eMOVZX ax, dl
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| 99 | jmp Char_ChangeCaseInAL ; Upper case drive letter to lower case keystroke
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| 100 |
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| 101 |
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| 102 | ;--------------------------------------------------------------------
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| 103 | ; BootMenuEvent_Handler
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| 104 | ; Common parameters for all events:
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| 105 | ; BX: Menu event (anything from MENUEVENT struct)
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| 106 | ; SS:BP: Menu library handle
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| 107 | ; Common return values for all events:
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| 108 | ; CF: Set if event processed
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| 109 | ; Cleared if event not processed
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| 110 | ; Corrupts registers:
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| 111 | ; All
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| 112 | ;--------------------------------------------------------------------
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| 113 | BootMenuEvent_Handler:
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| 114 | LOAD_BDA_SEGMENT_TO es, di
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| 115 | call RamVars_GetSegmentToDS
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| 116 |
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| 117 | %ifdef MENUEVENT_INLINE_OFFSETS
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| 118 |
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| 119 | add bx, FirstEvent
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| 120 | jmp bx
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| 121 |
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| 122 | EventNotHandled:
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| 123 | DoNotSetDefaultMenuitem:
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| 124 | xor dx, dx ; Clear CF (and menuitem index for DoNotSetDefaultMenuitem)
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| 125 | ret
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| 126 |
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| 127 | MENUEVENT_InitializeMenuinitFromDSSI equ (EventInitializeMenuinitFromSSBP - FirstEvent)
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| 128 | MENUEVENT_ExitMenu equ (BootMenuEvent_Completed - FirstEvent)
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| 129 | MENUEVENT_ItemHighlightedFromCX equ (EventItemHighlightedFromCX - FirstEvent)
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| 130 | MENUEVENT_ItemSelectedFromCX equ (EventItemSelectedFromCX - FirstEvent)
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| 131 | MENUEVENT_KeyStrokeInAX equ (EventKeyStrokeInAX - FirstEvent)
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| 132 | MENUEVENT_RefreshTitle equ (BootMenuPrint_TitleStrings - FirstEvent)
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| 133 | MENUEVENT_RefreshInformation equ (BootMenuPrint_RefreshInformation - FirstEvent)
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| 134 | MENUEVENT_RefreshItemFromCX equ (BootMenuPrint_RefreshItem - FirstEvent)
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| 135 | ;
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| 136 | ; Note that there is no entry for MENUEVENT_IdleProcessing. If MENUEVENT_IDLEPROCESSING_ENABLE is not %defined,
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| 137 | ; then the entry point will not be called (saving memory on this end and at the CALL point).
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| 138 | ;
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| 139 |
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| 140 | %else
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| 141 |
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| 142 | cmp bx, BYTE MENUEVENT.RefreshItemFromCX ; Above last supported item?
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| 143 | ja SHORT EventNotHandled
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| 144 | jmp [cs:bx+rgfnEventSpecificHandlers]
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| 145 |
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| 146 | EventNotHandled:
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| 147 | DoNotSetDefaultMenuitem:
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| 148 | xor dx, dx ; Clear CF (and menuitem index for DoNotSetDefaultMenuitem)
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| 149 | ret
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| 150 |
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| 151 | rgfnEventSpecificHandlers:
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| 152 | dw EventInitializeMenuinitFromSSBP ; MENUEVENT.InitializeMenuinitFromDSSI
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| 153 | dw EventCompleted ; MENUEVENT.ExitMenu
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| 154 | dw EventNotHandled ; MENUEVENT.IdleProcessing
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| 155 | dw EventItemHighlightedFromCX ; MENUEVENT.ItemHighlightedFromCX
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| 156 | dw EventItemSelectedFromCX ; MENUEVENT.ItemSelectedFromCX
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| 157 | dw EventKeyStrokeInAX ; MENUEVENT.KeyStrokeInAX
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| 158 | dw BootMenuPrint_TitleStrings ; MENUEVENT.RefreshTitle
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| 159 | dw BootMenuPrint_RefreshInformation ; MENUEVENT.RefreshInformation
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| 160 | dw BootMenuPrint_RefreshItem ; MENUEVENT.RefreshItemFromCX
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| 161 |
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| 162 | %endif
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| 163 |
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| 164 |
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| 165 | ;--------------------------------------------------------------------
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| 166 | ; EventInitializeMenuinitFromSSBP
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| 167 | ; Parameters
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| 168 | ; DS: Ptr to RAMVARS
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| 169 | ; ES: Ptr to BDA (zero)
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| 170 | ; SS:BP: Ptr to MENUINIT struct to initialize
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| 171 | ; Returns:
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| 172 | ; CF: Set if event processed
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| 173 | ; Cleared if event not processed
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| 174 | ; Corrupts registers:
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| 175 | ; Does not matter
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| 176 | ;--------------------------------------------------------------------
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| 177 | FirstEvent:
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| 178 | EventInitializeMenuinitFromSSBP:
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| 179 | ; Store default Menuitem (=default drive to boot from)
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| 180 | call GetDefaultMenuitemToDX
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| 181 | mov [bp+MENUINIT.wHighlightedItem], dx
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| 182 |
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| 183 | ; Store number of Menuitems
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| 184 | call RamVars_GetHardDiskCountFromBDAtoAX
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| 185 | xchg ax, cx
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| 186 | call FloppyDrive_GetCountToAX
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| 187 | add ax, cx
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| 188 | mov [bp+MENUINIT.wItems], ax
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| 189 |
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| 190 | ; Store menu size
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| 191 | mov WORD [bp+MENUINIT.wTitleAndInfoLines], BOOT_MENU_TITLE_AND_INFO_LINES
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| 192 | mov BYTE [bp+MENUINIT.bWidth], BOOT_MENU_WIDTH
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| 193 | add al, BOOT_MENU_HEIGHT_WITHOUT_ITEMS
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| 194 | xchg cx, ax
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| 195 | CALL_DISPLAY_LIBRARY GetColumnsToALandRowsToAH
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| 196 | sub ah, MENU_SCREEN_BOTTOM_LINES*2 ; Leave space for Hotkey Bar
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| 197 | MIN_U ah, cl
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| 198 | mov [bp+MENUINIT.bHeight], ah
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| 199 |
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| 200 | ; Store selection timeout
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| 201 | mov ax, [cs:ROMVARS.wBootTimeout]
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| 202 | CALL_MENU_LIBRARY StartSelectionTimeoutWithTicksInAX
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| 203 | stc
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| 204 | ret
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| 205 |
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| 206 |
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| 207 | ;--------------------------------------------------------------------
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| 208 | ; EventItemHighlightedFromCX
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| 209 | ; Parameters
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| 210 | ; CX: Index of new highlighted item
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| 211 | ; DX: Index of previously highlighted item or NO_ITEM_HIGHLIGHTED
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| 212 | ; DS: Ptr to RAMVARS
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| 213 | ; ES: Ptr to BDA (zero)
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| 214 | ; SS:BP: Menu library handle
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| 215 | ; Returns:
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| 216 | ; CF: Set if event processed
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| 217 | ; Cleared if event not processed
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| 218 | ; Corrupts registers:
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| 219 | ; Does not matter
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| 220 | ;--------------------------------------------------------------------
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| 221 | EventItemHighlightedFromCX:
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| 222 | push cx
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| 223 | call BootMenu_GetDriveToDXforMenuitemInCX
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| 224 | call DriveXlate_Reset
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| 225 | call DriveXlate_SetDriveToSwap
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| 226 |
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| 227 | ; We need to generate keystroke so selection two drives is possible.
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| 228 | ; The secondary boot drive is selected by highlighting it using menu keys
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| 229 | ; and the primary boot drive is selected by pressing drive letter hotkey.
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| 230 | call HotkeyBar_ConvertDriveNumberFromDLtoDriveLetter
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| 231 | call ConvertKeystrokeToAXfromDriveLetterInDL
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| 232 | call HotkeyBar_StoreHotkeyToBootvarsIfValidKeystrokeInAX
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| 233 | call RedrawHotkeyBarFromInsideMenuEventHandler
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| 234 |
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| 235 | ; Redraw changes in drive numbers
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| 236 | xor ax, ax ; Update first floppy drive (for translated drive number)
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| 237 | CALL_MENU_LIBRARY RefreshItemFromAX
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| 238 | mov dl, 80h
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| 239 | call GetMenuitemToDXforDriveInDL
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| 240 | xchg ax, dx ; Update first hard disk (for translated drive number)
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| 241 | CALL_MENU_LIBRARY RefreshItemFromAX
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| 242 | pop ax ; Update new item (for translated drive number)
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| 243 | CALL_MENU_LIBRARY RefreshItemFromAX
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| 244 | CALL_MENU_LIBRARY RefreshInformation
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| 245 | stc
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| 246 | ret
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| 247 |
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| 248 |
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| 249 | ;--------------------------------------------------------------------
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| 250 | ; EventItemSelectedFromCX
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| 251 | ; Parameters
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| 252 | ; CX: Index of selected item
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| 253 | ; DS: Ptr to RAMVARS
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| 254 | ; ES: Ptr to BDA (zero)
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| 255 | ; SS:BP: Menu library handle
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| 256 | ; Returns:
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| 257 | ; CF: Set if event processed
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| 258 | ; Cleared if event not processed
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| 259 | ; Corrupts registers:
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| 260 | ; Does not matter
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| 261 | ;--------------------------------------------------------------------
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| 262 | EventItemSelectedFromCX:
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| 263 | call BootMenu_GetDriveToDXforMenuitemInCX
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| 264 | jnc SHORT BootMenuEvent_Completed ; No menuitem selected
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| 265 |
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| 266 | ; Convert selected drive to hotkey keystroke
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| 267 | call HotkeyBar_ConvertDriveNumberFromDLtoDriveLetter
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| 268 | call ConvertKeystrokeToAXfromDriveLetterInDL
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| 269 | ; Fall to EventKeyStrokeInAX
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| 270 |
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| 271 |
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| 272 | ;--------------------------------------------------------------------
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| 273 | ; EventKeyStrokeInAX
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| 274 | ; Parameters
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| 275 | ; AL: ASCII character for the key
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| 276 | ; AH: Keyboard library scan code for the key
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| 277 | ; DS: Ptr to RAMVARS
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| 278 | ; ES: Ptr to BDA (zero)
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| 279 | ; SS:BP: Menu library handle
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| 280 | ; Returns:
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| 281 | ; CF: Set if event processed
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| 282 | ; Cleared if event not processed
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| 283 | ; Corrupts registers:
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| 284 | ; Does not matter
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| 285 | ;--------------------------------------------------------------------
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| 286 | EventKeyStrokeInAX:
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| 287 | cmp ah, BOOT_MENU_HOTKEY_SCANCODE
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| 288 | je SHORT BootMenuEvent_Completed ; Ignore Boot Menu hotkey
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| 289 | call HotkeyBar_StoreHotkeyToBootvarsIfValidKeystrokeInAX
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| 290 | jnc SHORT BootMenuEvent_Completed
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| 291 |
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| 292 | ; Hotkey is now stored to BOOTVARS and menu can be closed
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| 293 | ; Fall to CloseBootMenu
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| 294 |
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| 295 |
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| 296 | ;--------------------------------------------------------------------
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| 297 | ; CloseBootMenu
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| 298 | ; Parameters
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| 299 | ; DS: RAMVARS segment
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| 300 | ; ES: BDA segment (zero)
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| 301 | ; Returns:
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| 302 | ; Nothing
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| 303 | ; Corrupts registers:
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| 304 | ; Does not matter
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| 305 | ;--------------------------------------------------------------------
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| 306 | CloseBootMenu:
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| 307 | call DriveXlate_Reset
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| 308 | CALL_MENU_LIBRARY Close
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| 309 | ; Fall to RedrawHotkeyBarFromInsideMenuEventHandler
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| 310 |
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| 311 |
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| 312 | ;--------------------------------------------------------------------
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| 313 | ; RedrawHotkeyBarFromInsideMenuEventHandler
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| 314 | ; Parameters
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| 315 | ; DS: RAMVARS segment
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| 316 | ; ES: BDA segment (zero)
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| 317 | ; Returns:
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| 318 | ; Nothing
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| 319 | ; Corrupts registers:
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| 320 | ; AX, BX, CX, DX, SI, DI
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| 321 | ;--------------------------------------------------------------------
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| 322 | RedrawHotkeyBarFromInsideMenuEventHandler:
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| 323 | mov al, MONO_NORMAL
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| 324 | CALL_DISPLAY_LIBRARY SetCharacterAttributeFromAL
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| 325 |
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| 326 | mov bl, ATTRIBUTES_ARE_USED
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| 327 | mov ax, TELETYPE_OUTPUT_WITH_ATTRIBUTE
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| 328 | CALL_DISPLAY_LIBRARY SetCharOutputFunctionFromAXwithAttribFlagInBL
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| 329 | call HotkeyBar_DrawToTopOfScreen
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| 330 | ; Fall to BootMenuEvent_Completed
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| 331 |
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| 332 |
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| 333 | ;--------------------------------------------------------------------
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| 334 | ; BootMenuEvent_Completed
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| 335 | ; Parameters
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| 336 | ; Nothing
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| 337 | ; Returns:
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| 338 | ; CF: Set to exit from menu
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| 339 | ; Corrupts registers:
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| 340 | ; Nothing
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| 341 | ;--------------------------------------------------------------------
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| 342 | BootMenuEvent_Completed:
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| 343 | stc
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| 344 | ret
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