Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!srcsip!pavo!rogers
From: rogers@pavo.SRC.Honeywell.COM (Brynn Rogers)
Newsgroups: comp.sys.ibm.pc
Subject: Re: DTK expansion-RS232-port pinout wanted
Message-ID: <27221@srcsip.UUCP>
Date: 6 Aug 89 18:44:50 GMT
References: <3374@copper.MDP.TEK.COM> <1601@bucket.UUCP>
Sender: news@src.honeywell.COM
Reply-To: rogers@src.honeywell.com (Brynn Rogers)
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Organization: Honeywell Systems & Research Center
Lines: 26

In article <1601@bucket.UUCP> leonard@bucket.UUCP (Leonard Erickson) writes:
<michaelk@copper.MDP.TEK.COM (Michael D. Kersenbrock) writes:

<<A DTK Hex I/O card, like many other cards, has room for a second 8250
<<chip and a pair of RS232 interface chips.  The manual is silent, however,
<<about the pinout of the ten-square-pin connector.  Does anyone know
<<the pinout of that connector -- like "which RS232 signals are on which pin"?

<They map directly to a "standard" 9-pin D-shell connector. The pinout of
<*that* was standardized by the AT (trans. I don't have it handy)

<But just wire them straight to a 9-pin connector and it should work. 

  Sorry, I am pretty sure this is not that simple because I made one of these
for my DTK serial port.  I ohmed all the pins out and made up 3 conversion 
tables and my setup actually worked the first time ( amazing after three
translations).

  I will open my machine tonight and get the pinout of what I have there
that works.  It is possible that I have a non-standerd 9 -pin to ribbon 
cable, but I will check it out. (it is molded in plastic so I can't see.)



 Brynn Rogers    Honeywell S&RC        rogers@src.honeywell.com
 work 612-782-7577 home 874-7737