On Mon, 1 Jul 2013 09:53:58 +0000 DASDBILL2 <dasdbi...@comcast.net> wrote:
:>Low Address Protection only applies to the first 512 bytes of PSA. An authorized program can alter the remaining 7/8 of this page without having to change a control register. There is also another protection applied to the upper half of PSA that requires key 0 to fetch the data. This prevents unauthorized users from looking at some control blocks in which registers are stored which could possibly not belong to the currently active program. Actually there is non-protection for the low half of page zero via a CR to allow fetch w/o key zero. That actual page is currently key0 fetch protected. -- 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...@listserv.ua.edu with the message: INFO IBM-MAIN
