Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!sun-barr!decwrl!shelby!helens!relgyro!mike
From: mike@relgyro.stanford.edu (Mike Macgirvin)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Help needed in making a serial printer cable.
Message-ID: <319@helens.Stanford.EDU>
Date: 1 Aug 89 18:36:25 GMT
References: <28202@teknowledge-vaxc.ARPA> <2479@astroatc.UUCP>
Sender: news@helens.STANFORD.EDU
Reply-To: mike@relgyro.STANFORD.EDU (Mike Macgirvin)
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Organization: Stanford Relativity Gyro Experiment (GP-B)
Lines: 47

In article <2479@astroatc.UUCP> brown@astroatc.UUCP (Vidiot) writes:
>In article <28202@teknowledge-vaxc.ARPA> 0rrodrig@teknowledge-vaxc.ARPA (Russ Rodriguez) writes:
><I am in need of directions on how to connect the 25-pin printer port
><on an IBM PS2 model 70 to a serial printer interface on a printer.  I was
><under the impression that it worked this way:
><1 ----------> 1
><2 ----------> 3
><3 ----------> 2
><4 ----------> 20
><5 not used
><6 ----------> 11
><7 ----------> 7
><8-10 not used
><11 ---------> 6
><12-19 not used
><20 ---------> 4
><21-25 not used
><Unfortunately for me, this doesn't work at all.  Any help would be 
>You're right, it wouldn't work.  The key word here is "printer" port.  You
>have to connect to a "serial" port.  The printer port is a Centronics type
	Assuming you ARE using a serial port, this pinout would have a
higher likelyhood of success:
	computer                          printer
	       2 ------------------------ 3
	       3 ------------------------ 2

	       5 -|---------------------- 20 (handshake, pin 11 sometimes)
               6 -|                          ( see your printer manual )

	       7 ------------------------ 7

				       |- 4
                                       |- 5
                                       |- 6

          You might want to check out an excellent book on the subject,
"The RS-232 Solution", by Joe Campbell. 

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+          These views are my own, and my facts may not be correct.         +
+  Mike Macgirvin                                                           +
+  - Systems Administrator  Stanford Relativity Gyroscope Experiment (GP-B) +
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