/* WDOGTST.C
 *
 *      This example program shows how the watchdog timer may be used.
 *      This program enables the watchdog timer and then continues
 *      to strobe the timer so that it does not time out.
 *      When the <S> key is hit, the program ceases to strobe the
 *      watchdog and will reset the system after the timeout period.
 */

#include <conio.h>
#include <dos.h>

void interrupt far newtimer( void );

int WdogStrobed;

#define WDTMR        0xFE4C          /* write only */

/* the following define allows this program to be compile under Microsoft
   or Borland C */
#ifdef __TURBOC__
#ifndef outp
#define outp            outportb
#endif
#ifndef _dos_setvect
#define _dos_setvect    setvect
#endif
#endif

void PrintMenu(void)
{
	if (WdogStrobed)
		printf("Watchdog strobed. Hit <S> to disable strobing\n");
	else
		printf("Watchdog not strobed\n");
}


void EnableWdog(void)
{
	_dos_setvect(0x1C, newtimer);
}


main()
{
	int key;

	WdogStrobed = 1;

	printf("**********************************************************\n");
	printf("****************** Watchdog timer test *******************\n");
	printf("**********************************************************\n");

	PrintMenu();

	EnableWdog();
	for(;;)
	{
		if (kbhit())
		{
			key =getch();

			if ((key == 'S')||(key == 's'))
				WdogStrobed = 0;

			PrintMenu();
		}

		if (WdogStrobed)
			outp(WDTMR,0); /* strobes watchdog */
	}
}

/* this interrupt service routine does nothing but return */
void interrupt far newtimer()
{
}