RA_PIO_40_51_INT
sc->sc_intr_status40_51 |= gp_read(sc, RA_PIO_40_51_INT);
gp_write(sc, RA_PIO_40_51_INT, sc->sc_intr_status40_51);
gp_write(sc, RA_PIO_40_51_INT, 0xfff);