Windows COM port use

[Borge]

Question:

How do I access a Windows COM port from cygwin? I'd like to open a terminal
connection to an application I have running in an external MCU. Easy
business with TeraTerm but I don't know how to do it from the shell in
Cygwin. 

Eventually, I want to use Octave to generate some hex data and connect from
there.

I'm using 38400 baud 8/N/1 on what TeraTerm sees as COM1. I'm running Cygwin
on 32-bit XP.


Thanks,
Borge

P.S A nice-to-have would be to make logical serial ports, where incoming
data appears (selectively) in one or both terminals and where outgoing data
from the two terminals is mux'ed. That way I can use Octave for data
generation and another terminal as command interface.

Anybody heard of functionality like that?


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