* define INTERVALTIMER to use 4.[23] bsd interval timer.
* define FASTTIMER if you have the nap() system call.
* define FTIME if you have the ftime() system call.
* define INTERVALTIMER to use 4.[23] bsd interval timer.
* define FASTTIMER if you have the nap() system call.
* define FTIME if you have the ftime() system call.