Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!iuvax!ndcheg!ndmath!nstar!root
From: root@nstar.UUCP (Larry Snyder)
Newsgroups: comp.sys.ibm.pc
Subject: Re: EMS Support on a 386
Summary: serial IO under EMS
Message-ID: <114@nstar.UUCP>
Date: 9 Sep 89 14:14:29 GMT
References: <918.2504C171@busker.FIDONET.ORG> <332@fiver.UUCP>
Organization: The Northern Star, Notre Dame, IN
Lines: 26

In article <332@fiver.UUCP>, palowoda@fiver.UUCP (Bob Palowoda) writes:
>   I was wondering if it would affect communications programs to
>   the point that you would loose characters at 9600bps.

Hi Bob.  At work I write/maintain a real time factory production monitoring
system that runs on the PC (actually 286/386 machines) under DOS that
using a 9600 baud line for continuous bi-directional communications
with the machines on the plant floor.   The application is being cleaned
to run under Desqview - and we have been running it under DV with another
application (QMODEM) using COM2 at 38,400 kbaud during a download (or
upload) from another machine using Zmodem without problems. 
 
At home when I was a DOS fan, I was running multiple high speed modems
under DV using EEMS memory - and was getting around 113% transfers (out
of a possible 115% - based on 100% = 9600) using a 10 mhz 286 machine.

At home I was using 16550A chips with the 16 byte FIFO buffer and
had special software that utilitized the buffer which kept the serial
lines from loosing characters.


-- 
Larry Snyder                                              SCO Xenix 2.3.2 '386
uucp: iuvax!ndcheg!ndmath!nstar!larry                Computone Intelliport AT8
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