[Oberon] monitoring an RS-232 interface.
peter_easthope at gulfnet.sd64.bc.ca
peter_easthope at gulfnet.sd64.bc.ca
Sun Jun 15 10:43:08 CEST 2003
Here is a rather unusual problem.
I want to monitor the serial interface
of an external modem. The approach I am
considering is a generalization of that
described in
"http://www.oberon.ethz.ch/native/WebTrace.html" .
In this case we need to monitor both sending and
receiving lines. This will require a tee serial cable with
the side branch dividing to two cables. One of these
side branches needs the send and receive lines
crossed. This special cable will be inserted between
the modem and the server. Then one "observer"
machine can be attached to each of the side branches.
WIth this setup, one observer will monitor transmissions
from computer to modem and the other will monitor
transmissions from modem to computer. Perhaps one
machine with two serial ports is capable of monitoring
both lines. No doubt this would work with Unix but I
have not tried running two concurrent V24 tasks in Oberon.
Is such a technique described elsewhere? Any suggestions
or improvements on my proposal?
Thanks, Peter E.
http://carnot.pathology.ubc.ca/
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