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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/tests/altcrit.c')
-rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/tests/altcrit.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/tests/altcrit.c b/board/MAI/bios_emulator/scitech/src/pm/tests/altcrit.c new file mode 100644 index 00000000000..c5390f68a93 --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/pm/tests/altcrit.c @@ -0,0 +1,85 @@ +/**************************************************************************** +* +* SciTech OS Portability Manager Library +* +* ======================================================================== +* +* The contents of this file are subject to the SciTech MGL Public +* License Version 1.0 (the "License"); you may not use this file +* except in compliance with the License. You may obtain a copy of +* the License at http://www.scitechsoft.com/mgl-license.txt +* +* Software distributed under the License is distributed on an +* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or +* implied. See the License for the specific language governing +* rights and limitations under the License. +* +* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc. +* +* The Initial Developer of the Original Code is SciTech Software, Inc. +* All Rights Reserved. +* +* ======================================================================== +* +* +* Language: ANSI C +* Environment: any +* +* Description: Test program to check the ability to install a C based +* critical error handler. +* +* Functions tested: PM_installCriticalHandler() +* PM_criticalError() +* PM_restoreCriticalHandler() +* +* +****************************************************************************/ + +#include <stdlib.h> +#include <stdio.h> +#include "pmapi.h" + +volatile uint criticalError = false; +volatile uint axValue; +volatile uint diValue; + +#pragma off (check_stack) /* No stack checking under Watcom */ + +uint PMAPI criticalHandler(uint axVal,uint diVal) +{ + criticalError = true; + axValue = axVal; + diValue = diVal; + return 3; /* Tell MS-DOS to fail the operation */ +} + +int main(void) +{ + FILE *f; + + printf("Program running in "); + switch (PM_getModeType()) { + case PM_realMode: + printf("real mode.\n\n"); + break; + case PM_286: + printf("16 bit protected mode.\n\n"); + break; + case PM_386: + printf("32 bit protected mode.\n\n"); + break; + } + + PM_installAltCriticalHandler(criticalHandler); + printf("Critical Error handler installed - trying to read from A: drive...\n"); + f = fopen("a:\bog.bog","rb"); + if (f) fclose(f); + if (criticalError) { + printf("Critical error occured on INT 21h function %02X!\n", + axValue >> 8); + } + else + printf("Critical error was not caught!\n"); + PM_restoreCriticalHandler(); + return 0; +} |