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000178_news@watsun.cc.columbia.edu _Fri Jan 29 20:18:53 1999.msg
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From: jrd@cc.usu.edu (Joe Doupnik)
Subject: Re: More questions on Data Acquisition / RS-232
Message-ID: <CUgrpBPB3ED5@cc.usu.edu>
Date: 29 Jan 99 17:46:26 MDT
Organization: Utah State University
To: kermit.misc@mailrelay2.cc.columbia.edu
In article <36B24F12.A1CEC3EF@uh.edu>, Jagan Annamalai <jagan@uh.edu> writes:
> Frank da Cruz wrote:
>
>> :
>> If the device's DB-25 connector is a parallel interface and not a serial one,
>> then you're out of luck. You can't plug it into the PC's serial interface,
>> but MS-DOS Kermit does not support the parallel port as a communications
>> device. Parallel and serial interfaces are entirely different; no amount of
>> rewiring can make one communicate with the other.
>>
>> Have you ever seen the output from this device under any circumstances?
>
> There was another student here who had used Kermit to access data from the same
> device. So I know that it did work before. I remember him saying that he used the
> printer port on the computer. Are the different versions of kermit different?
> Could the older versions use the parallel port? I am indeed trying to get in touch
> with him. Don't know how long that's gonna take though.
>
> -Jagan
---------
No, MS-DOS Kermit has never touched the parallel port.
Let us suppose the external box is wired for a parallel port.
There will be nothing much we (Kermit folks) can do to help, but you might
be able to use an old serial to parallel converter box intended for printers,
but hook it up to the computer via the serial port.
Your experiment with Connect mode says two things. First, you
saw what you typed because echoing was still "local". Secondly, when
you typed nothing you saw nothing, so the signals from the external box
were not compatible with a serial port.
Finally, if this becomes a major difficulty then we could discuss
a contract to make a special Kermit which does talk directly to the parallel
port. That should be done directly to Columbia and myself, not to the NEWS
group.
Joe D.