source: xtideuniversalbios/trunk/Assembly_Library/Src/File/DosCritical.asm@ 530

Last change on this file since 530 was 526, checked in by krille_n_@…, 12 years ago

Changes:

  • Update of the copyright notices to include the year 2013.
File size: 2.6 KB
Line 
1; File name : DosCritical.asm
2; Project name : Assembly Library
3; Created date : 1.9.2010
4; Last update : 2.9.2010
5; Author : Tomi Tilli
6; Description : DOS Critical Error Handler (24h) replacements.
7
8;
9; XTIDE Universal BIOS and Associated Tools
10; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
11;
12; This program is free software; you can redistribute it and/or modify
13; it under the terms of the GNU General Public License as published by
14; the Free Software Foundation; either version 2 of the License, or
15; (at your option) any later version.
16;
17; This program is distributed in the hope that it will be useful,
18; but WITHOUT ANY WARRANTY; without even the implied warranty of
19; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20; GNU General Public License for more details.
21; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
22;
23
24
25; DOS Critical Error Handler return values
26struc CRITICAL_ERROR_ACTION
27 .ignoreErrorAndContinueProcessingRequest resb 1
28 .retryOperation resb 1
29 .terminateProgramAsThoughInt21hAH4ChCalled resb 1
30 .failSystemCallInProgress resb 1
31endstruc
32
33
34; Section containing code
35SECTION .text
36
37;--------------------------------------------------------------------
38; DosCritical_InstallNewHandlerFromCSDX
39; Parameters:
40; CS:DX: New Critical Error Handler
41; Returns:
42; Nothing
43; Corrupts registers:
44; AX
45;--------------------------------------------------------------------
46ALIGN JUMP_ALIGN
47DosCritical_InstallNewHandlerFromCSDX:
48 push ds
49
50 push cs
51 pop ds
52 mov ax, (SET_INTERRUPT_VECTOR<<8) | DOS_CRITICAL_ERROR_HANDLER_24h
53 int DOS_INTERRUPT_21h
54
55 pop ds
56 ret
57
58
59;--------------------------------------------------------------------
60; DosCritical_RestoreDosHandler
61; Parameters:
62; Nothing
63; Returns:
64; Nothing
65; Corrupts registers:
66; Nothing
67;--------------------------------------------------------------------
68ALIGN JUMP_ALIGN
69DosCritical_RestoreDosHandler:
70 push ds
71 push dx
72 push ax
73
74 lds dx, [cs:PSP.fpInt24hCriticalError]
75 mov ax, (SET_INTERRUPT_VECTOR<<8) | DOS_CRITICAL_ERROR_HANDLER_24h
76 int DOS_INTERRUPT_21h
77
78 pop ax
79 pop dx
80 pop ds
81 ret
82
83
84;--------------------------------------------------------------------
85; DosCritical_HandlerToIgnoreAllErrors
86; Parameters:
87; Nothing
88; Returns:
89; AL: CRITICAL_ERROR_ACTION
90; Corrupts registers:
91; Nothing
92;--------------------------------------------------------------------
93ALIGN JUMP_ALIGN
94DosCritical_HandlerToIgnoreAllErrors:
95 mov al, CRITICAL_ERROR_ACTION.ignoreErrorAndContinueProcessingRequest
96 iret
Note: See TracBrowser for help on using the repository browser.