IEXTEN           1517 src/dps8/panelScraper.c     config.c_lflag &= ~(unsigned int) (ECHO | ECHONL | ICANON | IEXTEN | ISIG);
IEXTEN            253 src/simh/linehistory.c   raw.c_lflag &= ~( ECHO | ICANON | IEXTEN | ISIG );