This is a good link http://www.longpelaexpertise.com.au/ezine/CrossMemoryBeginners.html
never saw a SAC 256 JUST 0 AND 512 -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Kristine Harper Sent: Friday, February 18, 2011 2:59 PM To: IBM-MAIN@bama.ua.edu Subject: Re: ASC. Mode 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 ---------------------------------------------------------------------- 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
