mouse.c

BIOS emulator and interface to Realmode X86 Emulator Library Can emulate a PCI Graphic Controller V

/****************************************************************************
*
*					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 an assembly
*				language mouse interrupt handler. We use assembly language
*				as it must be a far function and should swap to a local
*				32 bit stack if it is going to call any C based code (which
*				we do in this example).
*
*				Functions tested:	PM_installMouseHandler()
*									PM_int86()
*
*
****************************************************************************/

#include <stdlib.h>
#include <stdio.h>
#include "pmapi.h"

volatile long count = 0;

#pragma off (check_stack)			/* No stack checking under Watcom	*/

void PMAPI mouseHandler(
	uint mask,
	uint butstate,
	int x,
	int y,
	int mickeyX,
	int mickeyY)
{
	mask = mask;				/* We dont use any of the parameters	*/
	butstate = butstate;
	x = x;
	y = y;
	mickeyX = mickeyX;
	mickeyY = mickeyY;
	count++;
}

int main(void)
{
	RMREGS      regs;

	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;
		}

	regs.x.ax = 33;		/* Mouse function 33 - Software reset		*/
	PM_int86(0x33,&regs,&regs);
	if (regs.x.bx == 0) {
		printf("No mouse installed.\n");
		exit(1);
		}

	/* Install our mouse 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)mouseHandler,100);
	PM_lockDataPages((void*)&count,sizeof(count));
	if (!PM_setMouseHandler(0xFFFF, mouseHandler)) {
		printf("Unable to install mouse handler!\n");
		exit(1);
		}
	printf("Mouse handler installed - Hit any key to exit\n");
	PM_getch();

	PM_restoreMouseHandler();
	PM_unlockDataPages((void*)&count,sizeof(count));
    PM_unlockCodePages((__codePtr)mouseHandler,100);
    printf("Mouse handler was called %ld times\n", count);
	return 0;
}