"a given honey"??! What kind of a typo is that? What I meant to say is that it only uses one CTC connection for bidirectional communications with another host.
On Mon, Feb 20, 2023 at 11:31 AM Jay Maynard via <jaymaynard=
[email protected]> wrote:
Good thinking...except that VTAM, at least at the version 3 level, does not use a pair of CTCAs for a given honey. One is all it uses for bidirectional communications.
On Mon, Feb 20, 2023 at 10:41 AM Bob Polmanter <
wably@...> wrote:
Hi Silvio,
You might consider using two CTC devices in your application (rereading your post it seems you may have come to that conclusion as well).? Each CTC would operate in one direction only.? So for example, from the MVS side one CTC would only be used for issuing writes, and the other CTC would only be used for issuing reads.? Correspondingly on the Windows side, it would be the opposite.? The CTC that MVS is only writing to would be read-only for Windows, and the CTC that MVS is only reading from would be write-only for Windows.
In this way, you do not need to worry about a direction change and there is no need to issue any sense or control CCWs from either side.
This technique is used in more advanced operating systems, in VTAM for one example, using a pair of CTCs to communicate with another VTAM host.?? MVS DDT also uses two CTCs but I do not know for certain that DDT is in fact using this technique.
Regards,
Bob
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