FD_ISSET         2038 src/dps8/dps8_mgp.c               if (( status_conns[0] != 0 ) && FD_ISSET(status_conns[0], &rfd))
FD_ISSET         2071 src/dps8/dps8_mgp.c                   if (FD_ISSET(mgp_dev_state.conns[i].skt, &rfd))
FD_ISSET         1070 src/simh/sim_sock.c if (FD_ISSET (sock, er_p))
FD_ISSET         1072 src/simh/sim_sock.c if (FD_ISSET (sock, rw_p)) {