LIST P=16F84A INCLUDE __CONFIG _CP_OFF & _WDT_OFF & _PWRTE_ON & _XT_OSC ORG 0x00 GOTO START ORG 0x04 RETFIE START BSF STATUS, RP0 CLRF TRISB BCF STATUS, RP0 CLRF PORTB LOOP BSF PORTB, 0 CALL DELAY BCF PORTB, 0 CALL DELAY GOTO LOOP DELAY MOVLW 0xFF MOVWF 0x20 DELAY1 MOVLW 0xFF MOVWF 0x21 DELAY2 DECFSZ 0x21, F GOTO DELAY2 DECFSZ 0x20, F GOTO DELAY1 RETURN END