Address X'1000', the second word of the PSA, is fetch protected. Actually I think anything over X'800' is fetch protected. Wayne Driscoll Rocket Software Note - All opinions are strictly my own. -----Original Message----- From: IBM Mainframe Assembler List [mailto:[email protected]] On Behalf Of Paul Gilmartin Sent: Thursday, August 17, 2017 9:37 AM To: [email protected] Subject: Re: Source address significance for clearing MVCL
On 2017-08-17, at 08:33, Charles Mills wrote: > Address 0 is a legal fetch address. > Is there, for testing, an address that's guaranteed to be fetch-protected? > The question is can I get away with not worrying about what is in the > source address register? What, for example, if it points to a > non-address or to something that happens to be fetch-protected. (Code > is 64-bit FWIW, but I doubt that matters, other than increasing the > number of potential invalid > addresses.) > > Obviously not the world's biggest deal, of course. One LHI R2,0 every > now and then is not going to kill me. -- gil ================================ Rocket Software, Inc. and subsidiaries ■ 77 Fourth Avenue, Waltham MA 02451 ■ Main Office Toll Free Number: +1 877.328.2932 Contact Customer Support: https://my.rocketsoftware.com/RocketCommunity/RCEmailSupport Unsubscribe from Marketing Messages/Manage Your Subscription Preferences - http://www.rocketsoftware.com/manage-your-email-preferences Privacy Policy - http://www.rocketsoftware.com/company/legal/privacy-policy ================================ This communication and any attachments may contain confidential information of Rocket Software, Inc. All unauthorized use, disclosure or distribution is prohibited. If you are not the intended recipient, please notify Rocket Software immediately and destroy all copies of this communication. Thank you.
