FE_BMPR14
bus_space_read_1(bst, bsh, FE_BMPR14),
bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER | FE_B14_SKIP);
bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER);