Paul
Assuming you're vision of this "requirement" is for the application program
using the VTAM API constantly to be resending the text string so that the
impression is given that it floats gently over the presentation space surface,
the protocol on which you need to direct your attention when considering
permitting the simultaneous keying of characters for sending is neither the
ISPF environment nor the 3270 data stream but rather SNA.
- If the SNA session is "bound" to allow full-duplex, then "interaction" as
implied above is possible.
- If the SNA session is "bound" to allow half-duplex ("flip-flop"),
then "interaction" as implied above is *not* possible. The floating "banner"
can
be observed in idle moments but when some work needs to be done, the
restful image must be arrested with a use of the Attn key.
I'll avoid your needing to riposte that your use of CMS didn't involve SNA by
mentioning it myself! A raw 3270 pre/non-SNA channel-attached 3270 display
device connected through a 3272 or one of its successors is inherently full-
duplex so conversational freedom and its potential for concomitant confusion
reigns.
Chris Mason
On Fri, 29 Apr 2011 00:46:42 -0500, Paul Gilmartin <[email protected]>
wrote:
>On Fri, 29 Apr 2011 01:04:20 -0400, Dave Salt wrote:
>>
>>When you say "mainframe" are you talking about an ISPF session? If so, the
only way you can have something "constantly moving" is if the ISPF panel is
locked out and no user interaction can occur. Is that what you want to do?
>>
>This, of course, is a limitation imposed by ISPF and its environment,
>not of the 3270 protocol itself. I've seen better done with a 3270
>on CMS with a Pipelines FULLSCREEN stage -- I was able to type into
>an input field while other parts of the screen were dymamically
>updated.
>
>Going further afield, or in an orthogonal direction, this could be
>done on z/OS with an X11 client.
>
>>> Date: Fri, 29 Apr 2011 10:15:54 +0530
>>> From: Jags
>>>
>>> I would like to Publish some message as a bulletin in mainframe(Should be
>>> like message trailer - constantly moving from left to right). ...
>
>-- gil
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