Well, yes, the why is to access shared 64-bit common. It's worked well for years. A PC service to move some data and increment a pointer (millions of times per hour) seemed like overkill.
Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Rob Scott Sent: Wednesday, December 14, 2016 7:14 AM To: [email protected] Subject: Re: Question on SPKA and Control Register 3 Charles I am struggling to understand why you would want to run key0 and problem state anyway - it seems like a very strange brew and a bit of an oxymoron. Another question - why do you need Key0 in the first place? Is it just to access non-user key CSA ? If you have code that is running 99.9% of the time in user key and problem state and it requires some sort of authorized/supervisor service, then I would suggest implementing some sort of request to a service provider (maybe via PC-ss) to perform an encapsulated service on the caller's behalf. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
