I don't understand. An instruction with a zerow base does not use the AR associated with the index, so why won't it refer to the wrong AS when in AR mode?
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Assembler List [[email protected]] on behalf of Peter Relson [[email protected]] Sent: Sunday, January 24, 2021 9:02 AM To: [email protected] Subject: Re: Help with EZASMI assembly <snip> Is there code that has a zero base and non-zero index for something that might not be in common storage or in the primary AS? Wouldn't that cause problems in AR mode? </snip> To the first question: aside from the cases that apply to secondary and home ASC modes, I would hope not. To the second question: yes. It is a very valuable technique for AR mode. Peter Relson z/OS Core Technology Design
