The issuer sees the same values in R2-R12 before and after the ATTACH.

--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

________________________________________
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of 
Tony Harminc [t...@harminc.net]
Sent: Saturday, February 12, 2022 5:14 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Registers at entry to subtask (from ATTACH)

On Sat, 12 Feb 2022 at 13:54, Binyamin Dissen <bdis...@dissensoftware.com>
wrote:

> The manual (MVS Programming: Assembler Services Reference, Volume 1
> (ABE-HSP)) states
>
> 2-12 Used as work registers by the system.
>
> but I am looking at some old functional code which seems to expect
> (several?)
> registers values at ATTACH time be passed as is to the subtask.
>

Isn't the  "Used as work registers by the system" talking about the
registers the issuer sees after the ATTACH, rather than what the ATTACHed
subtask sees?

Tony H.

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