Quiz5a: mov     b,a
        anl     a,#85
        xch     a,b
        rrc     a
        anl     a,#85
        add     a,b
        mov     b,a
        anl     a,#51
        xch     a,b
        rr      a
        rrc     a
        anl     a,#51
        add     a,b
        <b>mov     b,#16
        div     ab</b>
        add     a,b
        ret