public void handler() {
            int r;
            r = ((m6800.cc & 0x01) << 7)&0xFF;
            CLR_NZC();
            m6800.cc |= (m6800.b & 0x01);
            r = (r | m6800.b >> 1)&0xFF;
            SET_NZ8(r);
            m6800.b = r&0xFF;
        }