| /**************************************************************************** |
| * |
| * 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 |
| * keyboard Int 15h interrupt handler. This is an alternate |
| * way to intercept scancodes from the keyboard by hooking |
| * the Int 15h keyboard intercept callout. |
| * |
| * Functions tested: PM_setKey15Handler() |
| * PM_restoreKey15Handler() |
| * |
| * |
| ****************************************************************************/ |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include "pmapi.h" |
| |
| volatile long count = 0; |
| volatile short lastScanCode = 0; |
| |
| #pragma off (check_stack) /* No stack checking under Watcom */ |
| |
| short PMAPI keyHandler(short scanCode) |
| { |
| count++; |
| lastScanCode = scanCode; |
| return scanCode; /* Let BIOS process as normal */ |
| } |
| |
| int main(void) |
| { |
| int ch; |
| PM_lockHandle lh; |
| |
| 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; |
| } |
| |
| /* Install our timer handler and lock handler pages in memory. It is |
| * difficult to get the size of a function in C, but we know our |
| * function is well less than 100 bytes (and an entire 4k page will |
| * need to be locked by the server anyway). |
| */ |
| PM_lockCodePages((__codePtr)keyHandler,100,&lh); |
| PM_lockDataPages((void*)&count,sizeof(count),&lh); |
| PM_installBreakHandler(); /* We *DONT* want Ctrl-Break's! */ |
| PM_setKey15Handler(keyHandler); |
| printf("Keyboard interrupt handler installed - Type some characters and\n"); |
| printf("hit ESC to exit\n"); |
| while ((ch = PM_getch()) != 0x1B) { |
| printf("%c", ch); |
| fflush(stdout); |
| } |
| |
| PM_restoreKey15Handler(); |
| PM_restoreBreakHandler(); |
| PM_unlockDataPages((void*)&count,sizeof(count),&lh); |
| PM_unlockCodePages((__codePtr)keyHandler,100,&lh); |
| printf("\n\nKeyboard handler was called %ld times\n", count); |
| printf("Last scan code %04X\n", lastScanCode); |
| return 0; |
| } |