VIAAR
bus_space_write_1(sc->sc_iot, sc->sc_ioh, VIAAR, 0);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, VIAAR, i);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, VIAAR,
bus_space_write_1(sc->sc_iot, sc->sc_ioh, VIAAR, 0x20);