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