usecs_walltime    120 src/simh/scp.h t_stat sim_activate_after (UNIT *uptr, uint32 usecs_walltime);
usecs_walltime    121 src/simh/scp.h t_stat _sim_activate_after (UNIT *uptr, uint32 usecs_walltime);
usecs_walltime   3215 src/simh/sim_tmxr.c t_stat tmxr_activate_after (UNIT *uptr, uint32 usecs_walltime)
usecs_walltime   3217 src/simh/sim_tmxr.c return _sim_activate_after (uptr, usecs_walltime);
usecs_walltime    267 src/simh/sim_tmxr.h t_stat tmxr_activate_after (UNIT *uptr, uint32 usecs_walltime);