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Date:      Fri, 6 Dec 1996 16:32:59 +1100
From:      Bruce Evans <bde@zeta.org.au>
To:        bde@zeta.org.au, brandon@glacier.cold.org
Cc:        hackers@freebsd.org
Subject:   RE: Help!  Turning off DTR on a serial device
Message-ID:  <199612060532.QAA12086@godzilla.zeta.org.au>

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>> ioctls.  Set the output speed to B0 to turn DTR off.  Keep it as B0 to keep
>> DTR off.  Set it back to the actual speed to turn DTR on.
>
>So, uhh, what baud rate does it run at, when  you set it to zero?  Is the
>baud rate irrelevant over the serial cable to the device?

The same as before, or it wouldn't work.  Setting the speed to 0 is
impossible and is conventionally used to turn DTR off.

Bruce



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