TN VXL 2-1

        list    p=PIC18f8722
        #include p18f8722.inc
        CONFIG  OSC = HS, WDT = OFF, LVP = OFF
        #define LED LATD
        #define LED_IO TRISD
; Begin
        code    0
        goto    initialize
; Memory mapping
        udata
counter res     .3
; Start
        PRG code
initialize
        clrf    LED_IO
        clrf    LED
main    incf    LED
        call    delay_500ms
        bra     main

delay_400us
        movlw   .249
        movwf   counter
        nop
delay_400us_loop
        nop
        decfsz  counter
        bra     delay_400us_loop
        return

delay_500ms
        movlw   .5
        movwf   counter + 1
delay_500ms_loop1
        movlw   .250
        movwf   counter + 2
delay_500ms_loop2
        call    delay_400us
        decfsz  counter + 2
        bra     delay_500ms_loop2
        decfsz  counter + 1
        bra     delay_500ms_loop1
        return

        end