N       	equ     20

        	org     $1000
total   	rmb     1

        	org     $1500   	; starting address of the program
        	ldaa    #0
        	staa    total   	; initialize total to 0
        	ldx     #array  	; use index register X as the array pointer
        	ldab    #N      	; use accumulator B as the loop count
loop    	brclr   0,x,$03,yes
        	bra     chkend
yes     	inc     total   	; add 1 to the total
chkend  	inx     	       	; move the array pointer
        	dbne    b,loop
forever 	bra     forever
array   	db      2,3,4,8,12,13,19,24,33,32,20,18,53,52,80,82,90,94,100,102
        	end