Path: utzoo!attcan!uunet!husc6!bloom-beacon!tut.cis.ohio-state.edu!rutgers!bellcore!texbell!merch!cpe!hal6000!iv
From: iv@hal6000.UUCP
Newsgroups: comp.sys.tandy
Subject: Re: Pinout of serial port on 16b?
Message-ID: <-217494@hal6000>
Date: 23 Nov 88 16:09:00 GMT
References: <366@oucsace.cs.OHIOU.EDU>
Lines: 55
Nf-ID: #R:oucsace.cs.OHIOU.EDU:366:hal6000:-217494:000:2107
Nf-From: hal6000.UUCP!iv    Nov 23 10:09:00 1988


/* Written 11:46 pm  Nov 21, 1988 by oucsace.UUCP!pmech in comp.sys.tandy
|  ---------- "Pinout of serial port on 16b?" ----------
| [ ... ]  Does anyone out there know the pinout for
| the 'A' and 'B' serial ports on a 16b? I would assume that they are
| the same as for the II and the 6000 (dangerous assumption, I know  ...)?
| I want to transfer over the last few source from the 16b, and then, if
| I can find anyone who wants it, sell it.
\* End of text from hal6000:comp.sys.tandy

The serial `A' and `B' channels are basically RS-232C, DTE configuration.
So, there are a couple of ways to transfer between it and another DTE
port.  You can take 3 (yes, three) null-modems, put two on one machine
and one on the other (you need one on each side so each side thinks it
has DCD [carrier] when it raises DTR, and the third re-crosses pins 2/3
and 4/5), and a straight '232 cable between.  Or, if you have the kind
of null modem you can take apart, and don't mind rewiring, use two and
inside one of them, uncross pins 2/3 and pins 4/5.

Or, you can build a cable to do the same job, wired like this:

	Pin		Pin

	  1  <-------->   1

	  3  <-------->   2

	  2  <-------->   3

	  5  <-------->   4

	  4  <-------->   5

	  8  <-----+-->  20
		   |
	 20  <--+----->   8
		|  |
	  6  <--+  +-->   6

	  7  <-------->   7

Hope this info helps as well as the pin-out Frank provided.
----
[This information was provided by an individual and is not  nor  should
 be  construed  as  being provided by Radio Shack or Tandy Corporation.
 Radio Shack and/or Tandy Corporation have no obligation to support the
 information provided, even if it was taken straight from their manual.
 As usual, if any salesman is caught by a techical question,  the staff 
 will disavow any knowledge of past machines.  This note will obfuscate
 in 5 seconds.  Good luck, %s.]

IV  (aka John Elliott IV)	 Domain: iv@hal6000.Tandy.COM
Tandy Systems Software		   UUCP: ...!killer!sys1!hal6000!iv
1300 Two Tandy Center		     or: ...!decvax!microsoft!trsvax!hal6000!iv
Fort Worth, TX 76102		  Phone: 817/390-2701; 9:30am-6:00pm CST