FIONBIO           597 src/dps8/dps8_socket_dev.c # if defined(FIONBIO)
FIONBIO           598 src/dps8/dps8_socket_dev.c     rc = ioctl (socket_fd, FIONBIO, (char *) & on);
FIONBIO           721 src/simh/sim_sock.c return ioctlsocket (sock, FIONBIO, &non_block);         /* set nonblocking */