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 <ASSEMBLER-LIST@LISTSERV.UGA.EDU> on behalf of
Steve Thompson <ste...@wkyr.net>
Sent: Monday, September 18, 2023 5:10 PM
To: ASSEMBLER-LIST@LISTSERV.UGA.EDU
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"
<ASSEMBLER-LIST@LISTSERV.UGA.EDU> 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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