1 /****************************************************************************
3 * SciTech OS Portability Manager Library
5 * ========================================================================
7 * The contents of this file are subject to the SciTech MGL Public
8 * License Version 1.0 (the "License"); you may not use this file
9 * except in compliance with the License. You may obtain a copy of
10 * the License at http://www.scitechsoft.com/mgl-license.txt
12 * Software distributed under the License is distributed on an
13 * "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
14 * implied. See the License for the specific language governing
15 * rights and limitations under the License.
17 * The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
19 * The Initial Developer of the Original Code is SciTech Software, Inc.
20 * All Rights Reserved.
22 * ========================================================================
28 * Description: Test program to check the ability to install a C based
29 * critical error handler.
31 * Functions tested: PM_installCriticalHandler()
33 * PM_restoreCriticalHandler()
36 ****************************************************************************/
42 volatile uint criticalError = false;
43 volatile uint axValue;
44 volatile uint diValue;
46 #pragma off (check_stack) /* No stack checking under Watcom */
48 uint PMAPI criticalHandler(uint axVal,uint diVal)
53 return 3; /* Tell MS-DOS to fail the operation */
60 printf("Program running in ");
61 switch (PM_getModeType()) {
63 printf("real mode.\n\n");
66 printf("16 bit protected mode.\n\n");
69 printf("32 bit protected mode.\n\n");
73 PM_installAltCriticalHandler(criticalHandler);
74 printf("Critical Error handler installed - trying to read from A: drive...\n");
75 f = fopen("a:\bog.bog","rb");
78 printf("Critical error occured on INT 21h function %02X!\n",
82 printf("Critical error was not caught!\n");
83 PM_restoreCriticalHandler();