#include <reg517a.h>

int i = 0;

void ISR_T0(void) interrupt 1
{
	if(i < 10)
	{
		P1 = 0;
	}
}

void main(void)
{
	EAL = 1;
	ET0 = 1;

	TH0 = 0x97;
	TL0 = 0xD6;

	TR0 = 1;
}