Date: Tue, 5 May 1998 14:13:59 -0400 (EDT) From: Byoung-Kee Yi <kee@wam.umd.edu> To: freebsd-questions@FreeBSD.ORG Subject: [Q] serial communication Message-ID: <Pine.SOL.3.95q.980505141126.12916A-100000@rac7.wam.umd.edu>
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Hi everyone -
I would like to connect a laptop to a desktop.
Both run FreeBSD R2.2.1 on them and, since I don't
have lan cards, I found serial communication is
the most economical way I can afford. That is,
I would like to use my laptop as a dumb terminal
attached to my desktop. What I need is just simple
file transfers using zmodem programs.
To that end, I made a full DB25-DB9 null modem
cable with the following wirings:
DB9 DB25
1 20
2 2
3 3
4 6
4 8
5 7
6 20
7 5
8 4
The serial ports are COM1 on the laptop and COM2
on the other. The corresponding /etc/ttys entry
of the desktop is,
ttyd1 "/usr/libexec/getty std.9600" unknown on secure
Then, I did the following on the laptop:
% cu -l /dev/cuaa0 -s 9600
I just got a message saying the device was already in use.
So I removed the "jumpering" wires (1&6 at DB9 end and 6&8 at DB29 end),
and I didn't get the message, but this time I didn't get the familiar
login screen either. Nothing happened except for "CONNECTED." message
from cu program.
What am I missing here? I would appreicate any suggestions.
-- Kee
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