[comp.periphs.printers] AT serial flow control problem with DTR

larry@twg.bc.ca (Lawrence Westrheim) (01/15/91)

Has  anyone tested the following configuration?  I have a  system
running SCO Xenix 2.3.2, and would like to be able to run a Texas
Instruments  TI-810  printer, with a standard AT serial port.   I
have  tried  to configure various RS-232 cables and have  had  no
luck, though I have on an Altos system.  On the AT serial port, I
am using the 9 pin serial port.

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.

My configuration is as follows:

       System          Printer     System         Printer
        9pin            25pin       9pin           25pin

- cable     2----------2                2----------2
            3----------3                3----------3
            5----------7                5----------7
            6----------20               6----------11
                   |---6                        |--6
                   |---8                        |--8
                   |---9                        |--9

If  someone  is  able  to  assist me,  I  would  appreciate  your
technical information.
-- 
Lawrence Westrheim   -      The Westrheim Group  -  Vancouver, BC, Canada
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
uunet!van-bc!twg!larry    (604) 431-9600 (voice) |     UNIX Systems
larry@twg.bc.ca           (604) 430-4329 (fax)   |     Integration

don@ddi1.UUCP (Don Reaves) (01/20/91)

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.