SYM_DISC_ENABLED
uc->data &= ~SYM_DISC_ENABLED;
lp->user_flags = tp->usrflags & (SYM_DISC_ENABLED | SYM_TAGS_ENABLED);
(lp && (lp->curr_flags & SYM_DISC_ENABLED));
tp->usrflags |= (SYM_DISC_ENABLED | SYM_TAGS_ENABLED);
tp->usrflags |= SYM_DISC_ENABLED;
tp->usrflags &= ~SYM_DISC_ENABLED;