source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/BootVars.asm @ 524

Last change on this file since 524 was 524, checked in by aitotat@…, 11 years ago

Changes to XTIDE Universal BIOS:

  • Min time to display hotkeys finally work correctly.
  • AT builds do not copy existing INT 13h handler to 40h by default, XT builds do.
  • Interrupts are enabled for Primary and Secondary controller by default on AT builds.
File size: 1.9 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Functions for accessings BOOTVARS.
3
4;
5; XTIDE Universal BIOS and Associated Tools
6; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
7;
8; This program is free software; you can redistribute it and/or modify
9; it under the terms of the GNU General Public License as published by
10; the Free Software Foundation; either version 2 of the License, or
11; (at your option) any later version.
12;
13; This program is distributed in the hope that it will be useful,
14; but WITHOUT ANY WARRANTY; without even the implied warranty of
15; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16; GNU General Public License for more details.
17; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
18;
19
20; Section containing code
21SECTION .text
22
23;--------------------------------------------------------------------
24; BootVars_Initialize
25;   Parameters:
26;       DS:     RAMVARS Segment
27;       ES:     BDA Segment
28;   Returns:
29;       Nothing
30;   Corrupts registers:
31;       AX, CX, DX, DI
32;--------------------------------------------------------------------
33BootVars_Initialize:
34%ifdef MODULE_8BIT_IDE_ADVANCED
35    mov     WORD [es:BOOTVARS.wNextXTCFportToScan], XTCF_BASE_PORT_DETECTION_SEED
36%endif
37
38    ; Clear all DRVDETECTINFO structs to zero
39    mov     al, DRVDETECTINFO_size
40    mul     BYTE [cs:ROMVARS.bIdeCnt]
41    mov     di, BOOTVARS.rgDrvDetectInfo    ; We must not initialize anything before this!
42    xchg    cx, ax
43
44%ifdef MODULE_HOTKEYS
45    call    Memory_ZeroESDIwithSizeInCX
46
47    ; Initialize HOTKEYVARS by storing default drives to boot from
48    mov     WORD [es:BOOTVARS.hotkeyVars+HOTKEYVARS.wFddAndHddLetters], DEFAULT_FLOPPY_DRIVE_LETTER | (DEFAULT_HARD_DRIVE_LETTER<<8)
49    mov     dl, [cs:ROMVARS.bBootDrv]
50    call    DriveXlate_ConvertDriveNumberFromDLtoDriveLetter
51    jmp     HotkeyBar_StoreHotkeyToBootvarsForDriveLetterInDL
52
53%else
54    jmp     Memory_ZeroESDIwithSizeInCX
55%endif ; MODULE_HOTKEYS
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