public void handler() {
            /*UINT16*/int t;
            t = (m6800.a + m6800.b)&0xFFFF;
            CLR_HNZVC();
            SET_FLAGS8(m6800.a, m6800.b, t);
            SET_H(m6800.a, m6800.a, t);
            m6800.a = t&0xFF;
            
        }