OSIOP_CTEST8
osiop_write_1(sc, OSIOP_CTEST8,
osiop_read_1(sc, OSIOP_CTEST8) | OSIOP_CTEST8_CLF);
osiop_write_1(sc, OSIOP_CTEST8,
osiop_read_1(sc, OSIOP_CTEST8) & ~OSIOP_CTEST8_CLF);
osiop_read_1(sc, OSIOP_CTEST8) >> 4, sc->sc_clock_freq);