Subject: Re: Are serial ports supported?
To: Nicholas Riley <firstname.lastname@example.org>
From: Ken Nakata <email@example.com>
Date: 06/08/1995 15:37:09
> I've been trying without success to talk to the serial ports on my
> SE/30...well, actually, to enable logins via them, but any kind of
> communication would be great to start. I connected a 2400 bps modem up
> to it, to see what would happen, and all that happened was that the
> lights on the modem flashed incessantly for about five minutes, then the
> system complained "invalid login" from that port, and the lights stopped
> flashing. I have no way of finding out what happened there, because when
> I tried connecting a computer to the port and setting it to the same
> settings (2400 bps, N81 and XON-XOFF flow control) I didn't receive
> anything. Should I be able to address the serial ports or not?
My best guess is that you don't have your /etc/ttys file set up correctly.
Default speed is 9600bps, I think. I used to use my wife's T3400 (Toshiba
486 subnotebook) as a terminal, connected to tty01 (printer port) via
Mac-to-modem cable, a hand-made null modem adapter, and a 9-25pin serial
cable. That worked fine.
You have to change the line below in /etc/ttys:
tty01 "/etc/getty std.9600" unknown off secure
to something like:
tty01 "/etc/getty std.2400" vt100 on
(if you're using the modem port, read "tty01" as "tty00")
I copied the line above from a DECstation 5900 running Ultrix, so there
may be slight difference with the actual /etc/ttys content of your box.
Hope this helps,