Xref: utzoo comp.sys.laptops:379 comp.sys.tandy:2096
Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!milano!uudell!mustang!jrh
From: jrh@mustang.dell.com (James R. Howard)
Newsgroups: comp.sys.laptops,comp.sys.tandy
Subject: Re: What are Tandy 1100FD serial port pinouts?
Message-ID: <2803@uudell.dell.com>
Date: 8 Mar 90 22:31:38 GMT
References: <1848@uakari.primate.wisc.edu>
Sender: news@uudell.dell.com
Reply-To: jrh@mustang.dell.com (James R. Howard)
Followup-To: comp.sys.laptops
Organization: Dell Computer Corp.
Lines: 32

In article <1848@uakari.primate.wisc.edu>, bin@primate.wisc.edu (Brain
in Neutral) writes:
> Ok, I have a Tandy 1100 FD laptop.  Now I want to build a cable for
> the DB-9 RS-232 serial port.  What signals are on each of the pins?
> Anyone know?
> 

It "should" be standard, i.e. compatible with a 9-pin AT serial port.

If so, here is the pinout...

9-pin     25-pin     Signal     In/Out    Description
----------------------------------------------------------------------
  1         8         DCD         IN       Carrier Detect 
  2         3         RX          IN       Receive Data
  3         2         TX          OUT      Transmit Data
  4         20        DTR         OUT      Data Terminal Ready 
  5         7         GND         ---      Signal Ground (common)
  6         6         DSR         IN       Data Set Ready
  7         4         RTS         OUT      Request to Send
  8         5         CTS         IN       Clear to Send
  9         22        RI          IN       Ring Indicator


--------------------------------------------------------------
James Howard
..cs.utexas.edu!dell!mustang!jrh   or    jrh@mustang.dell.com

"I've got a firm policy on gun control, if there's a gun       
around, I want to be the one controlling it."          
-- Clint Eastwood 
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