From: utzoo!decvax!cca!dan@Bbn-Unix@sri-unix Newsgroups: net.unix-wizards Title: Re: More getty questions Article-I.D.: sri-unix.3408 Posted: Tue Sep 21 22:39:07 1982 Received: Wed Sep 22 07:16:59 1982 From: Dan FranklinDate: 17 Sep 1982 11:33:27 EDT (Friday) I believe it's mostly historical. Some terminals (or at any rate, one terminal, the TTY 37) use a newline key instead of a CR key, and interpret an LF as a newline sequence. Getty identifies those terminals by looking at the character terminating the username line to see whether it's a CR or an LF. It can't do that if CRMOD is set, because unfortunately (as with most of the UNIX tty modes) it affects both input and output, and there's no way to map LF to CRLF on output without also mapping CR to LF on input. If you have no TTY 37s you can probably get by without this feature.