TIMERCOUNT
nsp_index_write(base, TIMERCOUNT, 0);
nsp_index_write(base, TIMERCOUNT, 0);
nsp_index_write(base, TIMERCOUNT, 0);
nsp_index_write(base, TIMERCOUNT, 0); /* requires 2 times!! */
nsp_index_write(base, TIMERCOUNT, time);