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From: austin@spies.sf-bay.org (Glenn Austin)
Newsgroups: comp.sys.mac.comm,comp.sys.mac.hardware,comp.sys.mac.misc
Subject: Re: connecting MacSE/30 serially to std. data line
Message-ID: <1991Feb4.002808.9118@spies.sf-bay.org>
Date: 4 Feb 91 00:28:08 GMT
References: <140242@tiger.oxy.edu> <36624@netnews.upenn.edu>
Organization: Spies in the wire (408) 867-7400
Lines: 34

In article <36624@netnews.upenn.edu> jeffe@eniac.seas.upenn.edu (George Jefferson ) writes:
>
>:I have a problem. I would like to connect a MacSE30 to a dataline
>:connection. The Hardware is simple -> it uses phone wire with
>:one send data wire, one recieve data wire, and one ground wire.
>
>
>If someone has handy an explination of the mac serial port pin connections
>I would apreciate that as well.

OK.  Here it is, straight from Inside Mac, Vol. 4:

        _____
      / 8 7 6 \
     | 5  4 3 |
      \  2 1  /
        ----- 

  1 - Output handshake
  2 - Input handshake/external clock
  3 - Transmit data -
  4 - Ground
  5 - Receive data -
  6 - Transmit data +
  7 - (not connected)
  8 - Receive data +

As I recall, tying pin 3 & pin 5 to ground gives you RS232 (port is RS423).

-- 
-----------------------------------------------------------------------------
| Glenn L. Austin               | "Turn too soon, run out of room,          | 
| Auto Racing Enthusiast and    |   Turn too late, much better fate"        |
|   Macintosh Wizard            |   - Jim Russell Racing School Instructors |