fd_set           1967 src/dps8/dps8_mgp.c   fd_set rfd;
fd_set           1063 src/simh/sim_sock.c fd_set rw_set, er_set;
fd_set           1064 src/simh/sim_sock.c fd_set *rw_p = &rw_set;
fd_set           1065 src/simh/sim_sock.c fd_set *er_p = &er_set;