WavePOD WaveLoop A

waveloop_10                         ; 1 MHz SQ wave, duty cycle 2/3

        movlw   179                 ; Vout is +1V (with OP-AMP)
        movwf   PORTB               ; put to the DAC
        nop
        nop
l_101
        comf    PORTB,f             ; negate the DAC value
        nop                         ; pad
        comf    PORTB,f             ; and return the DAC to initial value
        goto    l_101               ; and loop