IOMDKBC_CR
while ((bus_space_read_1(iot, ioh, IOMDKBC_CR) &
while ((bus_space_read_1(iot, ioh, IOMDKBC_CR) &
bus_space_write_1(iot, ioh, IOMDKBC_CR, on ? IOMDKBC_ENA : 0);
stat = bus_space_read_1(iot, ioh, IOMDKBC_CR);