A

.include"m328Pdef.inc"

.def al = R16
.def ah = R17
.def b = R18
.def cl = R20
.def ch = R21
.def d = R22

.cseg
.org 0x00
    rjmp start

start:  ldi cl , low(500)
        ldi ch , high(500)
        ldi b ,220
        ldi d,15
        mul b,d
        movw al,R0
        add al,cl
        adc ah,ch

        ldi zl,low(var_a)
        ldi zh,high(var_a)
        st z+,al
        st z+,ah
        st z+,b

END: rjmp END
.dseg
.org 0x10C
var_a: .byte 2
var_b: .byte 1