TS_CNTTB
SET(tp->t_state, TS_CNTTB);
CLR(tp->t_state, TS_CNTTB);
if (!ISSET(tp->t_state, TS_CNTTB))
#define TS_LOCAL (TS_BKSL | TS_CNTTB | TS_ERASE | TS_LNCH | TS_TYPEN)
{ TS_CNTTB, 'N'},