SBC comm SBC-770 manual Demo program

Demo program

outportb(0x444, 0):	// set time-out event to reset-system
outportb(0x443x 10);	// set time-out interval to 10 seconds
customer_job();	// execute your job here, be sure your
	job will finished within 10 seconds
outportb(0x443, 0);	// refresh watchdog timer, otherwise
	the system will reset after time-out
outputb(0x443, 20);	// set time-out interval to 20 seconds
another_job();	// another job finished in 20 seconds
outportb(0x443, 0)	// disable watchdog timer
...
...

Appendix A Programming the Watchdog Timer 99