Yes, it is coming back to me. Back in the day with Wylbur... I
had to deal with all of that. And then with Connect:Direct I was
doing testing with the cartridge tapes and when the Tape
libraries came out, they went scsi and IBM dropped EXCP support
for them, so that code is now deprecated since the Cart drives
are all EOL/OOS.
Steve Thompson
On 9/18/2023 5:24 PM, Tony Thigpen wrote:
Some of us on VSE-L are working on a program for which the
original programmer as passed away. The program runs under VSE
and does direct IO to a 3270 device to allow for repairing
'things' that have been messed up, such as the IPL procedures.
It includes a small editor.
The channel appendage routine is for handling errors from the
3270 which is really a TN3270 session on an OSA-C.
Tony Thigpen
Seymour J Metz wrote on 9/18/23 5:14 PM:
A CE appendage gets control after the channel program and any
associated error recovery have completed. In OS/360 it ran
disabled, but in MVS it runs as an extension of the EXCP
Supervisor; I don't recall what locks are held.
________________________________________
From: IBM Mainframe Assembler List
<[email protected]> on behalf of Steve Thompson
<[email protected]>
Sent: Monday, September 18, 2023 5:10 PM
To: [email protected]
Subject: Re: Channel Appendage Routines
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).
Regards,
Steve Thompson
On 9/18/2023 4:54 PM, Tony Thigpen wrote:
In VSE, yes.
Tony Thigpen
Dave Clark wrote on 9/18/23 4:36 PM:
"IBM Mainframe Assembler List"
<[email protected]> wrote on
09/18/2023 04:27:49 PM:
On the program we are both working on, the use of format-1
CCWs is not
needed. In the end, it's one linked together program that is
loaded by a
// EXEC card, thus it is always loaded in 24bit.
So, the only reason for using a format-1 CCW is so that
the I/O
buffer can reside in 31-bit space?
Sincerely,
Dave Clark
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