Serial port control?

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1 total messages Started by david williams Mon, 08 Apr 1991 04:43

#1135

Author: david williams
Date: Mon, 08 Apr 1991 04:43

19 lines
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   I've just recently aquired my *own* PC, rather than fooling around
with the computers the school so nicely lets me use.  Here's the 
question:  How do I set the DTR line inactive after some terminal
program has finished with the serial port?  
   Here's the reason:  I have a 'black box' I built about two years
ago (when I was still living in a dorm) that switches an RS-232 line
according to the state of the incoming DTR line on two ports.  This 
lets my roomate and I share one modem, and have automatic null-modem
if we both bring up comm programs.  Now that I have two computers of
my own, I want to be able to do this again.  However, PC's don't appear
to kill the DTR line when the port goes inactive,  (Maybe it's the 
program I'm using.  Any ideas?) which means the PC grabs the port
forever after I use the modem once.
   Please *mail* me any answers you may have, and I'll sumarize.

        Dave Williams
          dawill@hubcap.clemson.edu
             "Huh?  What?  Could you repeat the question?"

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