Linas, No. Either your storage key matches, or it doesn't. If it matches, you get read and write access, if it doesn't match, you get neither. (You _do_ get a S0C4 abend.)
Mark Post -----Original Message----- From: Linas Vepstas [mailto:linas@;linas.org] Sent: Monday, November 11, 2002 12:57 PM To: [EMAIL PROTECTED] Subject: Re: CPU Arch Security [was: Re: Probably the first published shell code] -snip- It has been years since I last looked at the 390 instruction set. Can't one set a read-only mode for selected PSW keys?