*BSD News Article 72814


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From: tedm@agora.rdrop.com
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Looking for help with hooking up VT100 terminal
Date: 4 Jul 1996 09:36:33 GMT
Organization: Symantec Corporation
Lines: 22
Message-ID: <4rg3b1$3uj@symiserver2.symantec.com>
References: <87ivc7tqt7.fsf@robigo.winternet.com>
Reply-To: tedm%toybox@agora.rdrop.com
NNTP-Posting-Host: 198.6.34.3
X-Newsreader: IBM NewsReader/2 v1.2

In <87ivc7tqt7.fsf@robigo.winternet.com>, jdb@robigo.winternet.com (John Boggs) writes:
>I'm trying to hook up a VT100 terminal to /dev/ttyd2
>(FreeBSD-2.1.0-R).  Up until yesterday my wife's computer was hooked
>into that port as a dumb terminal, but she has moved her computer
>elsewhere and I thought it'd be keen to get my VT100 working again,
>but when I turn on the VT100 I get:
>

It looks like the VT100 is toggling the DTR line on and off.  My guess is that
you have a RS232 cable that is wired up in a strange way.  (At least, strange
for a VT100 that is)  You also may have local echo turned on on the VT100.

One thing you might want to do is go ahead and use the std.9600 entry anyway,
and add padding entries in your /etc/termcap.  I think the VT100 liked to lose
characters after complex cursor manipulations, padding is going to be a lot more
helpful than just dropping the speed until the terminal seems useable.

Also, if I remember right one more thing, the original VT100 didn't support
handshaking via RTS/CTS (and I don't think it even did with DSR/DTR either)
it used XON, XOFF.  Perhaps the terminal is sending the XOFF character to
the computer which is responding to that?