Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!ddi1!don
From: don@ddi1.UUCP (Don Reaves)
Newsgroups: comp.periphs.printers
Subject: Re: AT serial flow control problem with DTR
Message-ID: <271@ddi1.UUCP>
Date: 19 Jan 91 21:46:48 GMT
References: <462@twg.bc.ca>
Organization: Data Decisions, Inc.
Lines: 40

In article <462@twg.bc.ca> larry@twg.bc.ca (Lawrence Westrheim) writes:
> [stuff deleted..]
>I  am  having  a  flow-control problem.   My  understanding  from
>reading  the  TI-810 manual, that the printer only supports  DTR,
>and will not support Xon/Xoff.
>
> [stuff deleted]
>
>If  someone  is  able  to  assist me,  I  would  appreciate  your
>technical information.

Enclosed is my cheat sheet for ti-810's. 
 
Texas Instruments 810 
Hardware handshaking with AT 9pin / 25 DTE

9 pin      25 pin                    TI-810 (also DTE)

4 ---dtr----20------------------ 8   (--> enable printer)
2            3                   2   (not used, held at neg. level)
3 ---txd-----2------------------ 3   (--> data to printer)
4 ---sg------7------------------ 7   (signal common)
8 ---cts-----5------------------ 11  (<-- printer busy)
1 ---dcd-----8------------------ 20  (<-- printer ready when on line and ready)
                             +-- 6 
                             |       (jumper 6 to 9)
                             +-- 9   (pin 9 is a +12V source ) 
                                 4   (not used, held at neg. level)
                                 5   (not used)
Notes:
Confirm jumpers E8 - E9 for normal rev. channel on printer's processor card
                (E7-E8 inverts the busy signal)

Enable hardware handshaking 
   ctsflow -hupcl clocal -ixon -ixoff (Xenix 2.3) 
   ibusy -hupcl clocal -ixon -ixoff (Prime EXL 320 5.3.1/2)
   revschan -hupcl clocal -ixon -ixoff (Unisys 5000/20/50)

Don Reaves
Data Decisions, Inc.