I don't know what an ICA is in this context, but your note rang a bell. When the folks I work with configure a (modern) machine to be used for TPF, they include this feature code.

8P2980  OSA ICC- 3215 Enablement    (this one for a z15)

I've been told this is needed for TPF console processing, although I don't know the details. 8P2980 costs money so it's not configured on machines we work with that don't run TPF.

On 7/25/2023 12:03 PM, Jon Perryman wrote:
  > Phil wrote: What does "not supported" mean per se?

  The last 3215 connected to IBM computers using an ICA. IBM z computers do not 
have an ICA nor byte channel therefore not supported on a z16. I suspect you 
can't even define one in the HCD. What was the last IBM computer to have an ICA.
     On Monday, July 24, 2023 at 10:48:42 AM PDT, Phil Smith III 
<li...@akphs.com> wrote:
Shmuel asked:
Do you have the URL for the Tracy Dean paper?

Yes, I've read it.

Does it spell out all the pieces?
Probably, but as I said before, it makes enough assumptions that I can't 
understand what to do.

Alan Staller wrote:
Going back to the original post, I seemed to have missed the
information about the operating system release.

z/OS (MVS...) has not supported the 3215 for at least 20 years. (ISTR
MVS/ESA R.x, but that could be incorrect.)

This is z/OS 2.4. What does "not supported" mean per se? It comes up fine, just 
the output is fugly. And I'm 99.44% sure that wasn't true on our previous system.

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