probe_sendack
int probe_sendack(bus_space_tag_t iot, bus_space_handle_t ioh, int cmdbyte);
status = probe_sendack(iot, ioh, KBC_DISABLE);
if (probe_sendack(iot, ioh, KBC_ID) != PROBE_SUCCESS)
if (probe_sendack(iot, ioh, KBC_ENABLE) ==