fd_set 1968 src/dps8/dps8_mgp.c fd_set rfd; fd_set 1057 src/simh/sim_sock.c fd_set rw_set, er_set; fd_set 1058 src/simh/sim_sock.c fd_set *rw_p = &rw_set; fd_set 1059 src/simh/sim_sock.c fd_set *er_p = &er_set;