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From: jbaron@silver.ucs.indiana.edu (Jeffrey Baron)
Newsgroups: comp.sys.mac.comm
Subject: Re: Need help connecting Tandy 200 to Mac 512K
Message-ID: <1991Feb23.222404.7729@bronze.ucs.indiana.edu>
Date: 23 Feb 91 22:24:04 GMT
References: <29028@cs.yale.edu>
Sender: news@bronze.ucs.indiana.edu (USENET News System)
Organization: Indiana University, Bloomington
Lines: 44

I have a much simpler question:

I have here a laptop IBM with a 9 pin AT serial port.

I also have here a Mac Plus.  Between the two I have a din8 to 9pin
printer cable.  I have a Null modem adapter (Radio Shack) tossed into
the line.  On the IBM end, I have Procomm or Bitcom.  On the Mac end,
I have Microphone or Red Ryder.  Everyone agrees that the Null modem
will simulate a modem between the two machines, and I have done the
following:

On bitcom, ignore DSR (ignore the fact that Ma Bell isn't there).
In fact, I have tried every combination of line settings I could find on
the four different programs.

Take two modems (one 1200, one 2400), connect with a phone line.
On a Mac 512ke, do a 9pin seriel to 9pin seriel (mind you, when I put
the Null modem adaptor anywhere near the 512ke, the machine was reduced
to a paperweight with asthma- it went totally dead, and made a noise
like a leaky air hose.  It was ok once I removed the adaptor, though).

On all these cases and more, the two failed to recognize the other's 
existance.  
I've had speculation before, and I thank all those who offer it.  What 
I want now is experience.  Somebody has used this
configuration, and knows what one can do with the aforementioned
resources.  I do not have the money to buy Mac Link for $169.  I call
this a last resort.  However, if everyone agrees that it can be done, 
would someone please tell me how to do it without something as expensive
as a TOPS network or buying a new Mac?  Or has everyone else won the
lottery and upgraded to newer macs and I simply missed the January 24
deadline...?

Incidentally, I am more looking for 512ke<->IBM AT than Plus<->AT.
I only include the plus because I have access to a plus for the time
being, and because somebody mentioned the idea that a plus<->IW II cable
is a null modem cable.  And yes, I have tried it with and without the 
null modem adaptor.

Thank you to whoever can solve this dilemma.  I'm sure I speak for a lot
of readers who have suffered through a lot of silent misery.

(.X.) Jeffrey Baron
 -__- jbaron@silver.ucs.indiana.edu