AMI_ISTAT
stat = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AMI_ISTAT);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AMI_ISTAT, stat);
status = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AMI_ISTAT);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AMI_ISTAT, status);