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 >> -- >> int.ext: 91078 >> direct: (937) 531-6378 >> home: (937) 751-3300 >> >> Winsupply Group Services >> 3110 Kettering Boulevard >> Dayton, Ohio 45439 USA >> (937) 294-5331 >> >> >> >> >> ********************************************************************************************* >> >> This email message and any attachments is for use only by the >> named addressee(s) and may contain confidential, privileged >> and/or proprietary information. If you have received this >> message in error, please immediately notify the sender and >> delete and destroy the message and all copies. All >> unauthorized direct or indirect use or disclosure of this >> message is strictly prohibited. No right to confidentiality >> or privilege is waived or lost by any error in transmission. >> ********************************************************************************************* >>
