0 = Primary, which is the standard mode HOME = 768, which requires supervisor state.
On Sun, 20 Feb 2011 01:55:43 -0500 michealbutz <michealb...@optonline.net> wrote: :>Home mode is SAC 0 ??? :> :>-----Original Message----- :>From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Binyamin :>Dissen :>Sent: Saturday, February 19, 2011 1:54 PM :>To: IBM-MAIN@bama.ua.edu :>Subject: Re: ASC. Mode :> :>And in HOME mode the instructions are fetched from the HOME address space. In :>all other cases they are fetched from the PRIMARY address space (though when :>XMS came out when executing in secondary mode some CPU models would fetch from :>the primary and others would fetch from the secondary). :> :>On Fri, 18 Feb 2011 14:58:57 -0500 Kristine Harper <kristine.har...@neon.com> :>wrote: :> :>:>ASC mode is determined by PSW bits 16 and 17, and tells the system where to find the :>referenced data (the data referenced by the address in the GPRs). When ASC mode is :>secondary, SAC is 256 and you are in cross memory mode. And the data resides in the :>secondary address space. :>:> :>:>Kristine Harper :>:>IMS R&D :>:>NEON Enterprise Software :>:> :>:>-----Original Message----- :>:>From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Micheal :>Butz :>:>Sent: Thursday, February 17, 2011 2:35 PM :>:>To: IBM-MAIN@bama.ua.edu :>:>Subject: ASC. Mode :>:> :>:>Hi :>:> :>:>I know ASC mode refers to the Set Address Space Control instruction :>:> :>:>SAC. 0. Primary :>:> :>:>SAC 512 AR. Mode :>:> :>:>But what does it mean :>:> :>:>ASC mode: Primary or Secondry :>:> :>:>In the IBM manuals :>:> :>:> :>:> :>:>Sent from my iPhone :>:> :>:>---------------------------------------------------------------------- :>:>For IBM-MAIN subscribe / signoff / archive access instructions, :>:>send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO :>:>Search the archives at http://bama.ua.edu/archives/ibm-main.html :>:> :>:>---------------------------------------------------------------------- :>:>For IBM-MAIN subscribe / signoff / archive access instructions, :>:>send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO :>:>Search the archives at http://bama.ua.edu/archives/ibm-main.html -- Binyamin Dissen <bdis...@dissensoftware.com> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
