tmxr_set_line_loopback 2070 src/simh/sim_tmxr.c tmxr_set_line_loopback (lp, FALSE);
tmxr_set_line_loopback 2557 src/simh/sim_tmxr.c                 tmxr_set_line_loopback (lp, loopback);
tmxr_set_line_loopback 2820 src/simh/sim_tmxr.c               tmxr_set_line_loopback (lp, loopback);
tmxr_set_line_loopback  237 src/simh/sim_tmxr.h t_stat tmxr_set_line_loopback (TMLN *lp, t_bool enable_loopback);