Stap 9: Attiny230d
.EQU DDRB = $17 ; DDRB address .EQU PORTB = $18 ; PORTB address .EQU LED_X = 0 ; LED_X is on PB0, pin 12 of ATtiny2313 ; Pins connected to LED are outputs, DDRx=1 (set): SBI DDRB, LED_X ; SBI - Set Bit in I/O Register HOP: SBI PORTB, LED_X CBI PORTB, LED_X RJMP HOP