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From: geoff@desint.UUCP (Geoff Kuenning)
Newsgroups: net.unix-wizards
Subject: Turning asynchronous lines synchronous - any standards?
Message-ID: <155@desint.UUCP>
Date: Thu, 23-Jan-86 01:41:29 EST
Article-I.D.: desint.155
Posted: Thu Jan 23 01:41:29 1986
Date-Received: Fri, 24-Jan-86 09:19:07 EST
Reply-To: geoff@desint.UUCP (Geoff Kuenning)
Organization: SAH Consulting, Manhattan Beach, CA
Lines: 15

With modern micromputers and their USART-based serial drivers, it becomes
sensible to support both asynchronous and synchronous protocols with the
same drivers and /dev/tty nodes, and to allow switching between synch
and asynch on the same port.  (My Hayes modem even supports this with
a mode where you autodial in asynch and then go synch).

The question then becomes, how does one tell the system which flavor to
use on a port, and when to switch between flavors if your feel like it?
And do you default to asynch, or have some way to specify how a port
defaults?  I'm sure somebody out there has addressed the problem (Sun?
Apollo? are you listening?) and I'd sure love to stay compatible.
--

        Geoff Kuenning
        {hplabs,ihnp4}!trwrb!desint!geoff