"IBM Mainframe Assembler List" <[email protected]> wrote on
09/18/2023 05:10:51 PM:
> Forgive me, but I can't remember what a channel appendage is or
> is for.
>
> Could you just give me a quick answer/idea.
>
> I used to do CCW stuff but since ECKD, I've only done CCWs for
> tape (which is now not supported).
In my case, I am using a channel appendage routine to synchronize
native 3270 I/O. Basically, after writing to the 3270 device, I can't read
immediately and must wait for an attention interrupt to tell me when the
3270 device has data to be received.
Sincerely,
Dave Clark
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