intrptcnt = 0;
char turnaround;

void Timer0_ISR (void) interrupt	1
{	
    ET0 = 0;								 
    TF0 = 0; //clear flag
    intrptcnt++;
    if (intrptcnt >= 1000) {
        intrptcnt = 0;
        turnaround = 1;
    }
    TL0 = 0xCC;
    TH0 = 0xD4;
    ET0 = 1;
}