_sim_activate_after 8457 src/simh/scp.c return _sim_activate_after (uptr, usec_delay);
_sim_activate_after  119 src/simh/scp.h t_stat _sim_activate_after (UNIT *uptr, uint32 usecs_walltime);
_sim_activate_after 3223 src/simh/sim_tmxr.c return _sim_activate_after (uptr, usecs_walltime);