FIRMWARE.FMT

             CONSTANT delay_1us_constant, 0B
             ADDRESS 000                     ; program se vedno zacne na naslovu 0
      start: LOAD s3, 07                     ; v register s1 nalozimo 0F (prizgali bomo desne 4 ledice)
       loop: OUTPUT s3, FF                   ; na izhod 01 dajemo vsebin registra s1
             CALL delay_500us                ; poklicemo delay
             CALL delay_500us
             CALL delay_500us
             CALL delay_500us
             CALL delay_500us
             CALL delay_500us
             CALL delay_500us
             CALL delay_500us
             CALL delay_500us
             CALL delay_500us
             RR s3                           ; pomaknemo vsebino registra s1 v desno
             JUMP loop
  delay_1us: 
             LOAD s0, delay_1us_constant
   wait_1us: 
             SUB s0, 01
             JUMP NZ, wait_1us
             RETURN
delay_500us: 
             LOAD s2, F0
             LOAD s1, BD
 wait_500us: 
             CALL delay_1us
             SUB s1, 01
             SUBCY s2, 00
             JUMP NC, wait_500us
             RETURN
             ADDRESS 3FF                     ; prekinitveno servisna rutina se nahaja na zadnjem
             ;naslovu v romu (3FF)
        isr: JUMP isr                        ; isr = interrupt service routine