Oh yes. Just like with a console typewriter as I recall.
It has to send the interrupt to tell you it is ready for you to read.
I'm not sure how T-MON does this, but it can write back to the
device and keep it updating as I recall. Some of the other
monitor products can do the same. I don't think that is what you
would want.
Steve Thompson
On 9/18/2023 5:29 PM, Dave Clark wrote:
"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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