NEC86_CTRL
data = bus_space_read_1(iot, ioh, NEC86_CTRL);
bus_space_write_1(iot, ioh, NEC86_CTRL, data);
data = bus_space_read_1(iot, ioh, NEC86_CTRL);
bus_space_write_1(iot, ioh, NEC86_CTRL, data);