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Article View: comp.protocols.ibm
Article #821

Re: 3270 ATTN key -- what does it generate?

#821
From: Dan Mercer
Date: Fri, 21 Dec 1990 18:29
42 lines
2173 bytes
In article <9012162110.AA17045@lilac.berkeley.edu> Karl Denninger
        <ddsw1!bbs!karl@GARGOYLE.UCHICAGO.EDU> writes:
:Hello Usenet.Oracle...
:
:We have a real nice X-windows 3270-style emulator here, but it has one
:problem.....
:
:It is talking through a Mitek gateway in tn3270 mode.  We have 95+%
:functionality, but there is one glaring hole -- there is no code for an ATTN
:key!
:
:Needless to say, this is a problem.  We need this supported, as it's the
:only way to do some things.
:
:I can easily hack in the code to send the sequence(s) to the host, IF I know
:what they are!  So far, I have been unable to determine this.
:
:Any help appreciated greatly.... If someone knows just what is generated
:when an ATTN key is pressed, that is probably enough.
:
:Thanks!
:
:--
:Karl Denninger  AC Nielsen
:kdenning@ksun.naitc.com
:(708) 317-3285
:Disclaimer:  Contents represent opinions of the author; I do not speak for
:             AC Nielsen on Usenet.

The ATTN key will send SIGNAL to the host to request the Change
Direction indicator (CD).  The command is expedited but has no effect
on SLU states.  Once Signal has been sent,  pressing the ATTN or PA
keys will not cause a second ATTN until the 3274 has received a
response to the first.  Normally,  the PLU responds by sending a NULL
RU with the CD flag set.  If I had my SNA FAP (Formats and Protocols)
on me I'd give you the actual Signal format,  but I took it home.

--
Dan Mercer
NCR Network Products Division      -        Network Integration Services
Reply-To: mercer@npdiss1.StPaul.NCR.COM (Dan Mercer)
"MAN - the only one word oxymoron in the English Language"
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From: mercer@npdiss1.UUCP (Dan Mercer)
Newsgroups: comp.protocols.ibm
Subject: Re: 3270 ATTN key -- what does it generate?
Message-ID: <9012300135.AA14794@lilac.berkeley.edu>
Date: 21 Dec 90 18:29:23 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: Dan Mercer
              <mvb.saic.com!ncr-sd!ncrlnk!ncrstp!npdiss1!mercer@UCSD.EDU>
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