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From: pwong@theory.tn.cornell.edu (Patrick Wong)
Newsgroups: comp.sys.laptops
Subject: Re: More on the CF-150B
Message-ID: <1991Feb23.162730.23411@batcomputer.tn.cornell.edu>
Date: 23 Feb 91 16:27:30 GMT
References: <6576@celery15.UUCP> <1991Feb23.053309.1081@bronze.ucs.indiana.edu>
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In article <1991Feb23.053309.1081@bronze.ucs.indiana.edu> jbaron@silver.ucs.indiana.edu (Jeffrey Baron) writes:
>Hi again, everyone...
>First off, I thank the gentleman who responded to my question about putting
>a second serial port into a Panasonic by using the internal modem socket.
>It wasn't a "I have blown out 3 machines trying to do the same thing" story,
>but it gave me an idea of what I was talking about.
>I am still open to responses about this.  Another gentleman asked me to 
>forward anything I got to him (equally curious).
>
I asked the exact question about a year ago when I wanted to put a second
serial port on my T1000SE by making use of the connector in the dedicated
modem slot of the machine.  However, back then, I found out that it is
not as easy as one thinks.  The reason is that the modem Port is a dedicated
modem port, not a RS232C port.  Therefore, it is not as simple as getting
the pinout info of the modem port and connecting it to a DB9 or DB25 connector.
I had talked to a Toshiba engineer on the phone and he even faxed me a 
sheet which lists all the signals coming to the modem port.  However, as
I am no hardware guru, I don't seem to recognise all these signals.  But,
I am certain that there is nothing like CD, DTS, DTR, etc.  It seems like
the special matching connector, tHat I tried very hard to get, to connect
to the modem port can not be put into good use.

The closest thing I could find is a company that makes a RS232/422 card that
can be put in the modem slot of a ZENITH laptop.  They had explicity told
me that they only make this 2nd serial port card for ZENITH laptop, nothing
else.

So, if you have any more info. now or in the future, please let me know.
(I think at some point I will have enough of swapping of a serial mouse,
modem, and a serial printer).
><---(.X.)---{{ 
>     -__-     Phaedrus
>----------------------
>jbaron@silver.ucs.indiana.edu

Patrick Wong


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