RA_PIO_00_23_INT
sc->sc_intr_status00_23 |= gp_read(sc, RA_PIO_00_23_INT);
gp_write(sc, RA_PIO_00_23_INT, sc->sc_intr_status00_23);
gp_write(sc, RA_PIO_00_23_INT, 0xffffff);