+; enable interrupts int0,int1
+ldi r16,((1<<INT0)|(1<<INT1))
+out GIMSK,r16
+; int0/1 setup
+ldi r16,((1<<ISC01)|(1<<ISC00)|(1<<ISC11)|(1<<ISC10))
+out MCUCR,r16
+sbis PORTD,PORTD2
+cbi MCUCR,ISC00
+sbis PORTD,PORTD3
+cbi MCUCR,ISC10
+
+; enable t/c overflow interrupt
+sbi TIMSK,TOIE1
+; setup t/c
+ldi r16,((1<<CS12)|(1<<CS11)|(1<<CS10))
+out TCCR1B,r16
+