JR, I appreciate your input ..and of course error handling is second nature..the question was really concerning how it worked . Peter and Lizette were kind enough to explain how it worked ...
Scott ford www.identityforge.com from my IPAD 'Infinite wisdom through infinite means' On Jun 17, 2013, at 8:34 AM, J R <jayare...@hotmail.com> wrote: > While Peter Relson's posts are always appreciated, was this not somewhat > stating the obvious? > > I don't know what the percentage may be but a substantial amount of (esp. > commercial) software development is devoted to exception handling, error > recovery, etc. > > Also, we keep seeing comments like, "I don't like to assume ..." There is > nothing wrong with making assumptions as long as you assume *and* verify. In > this case, > > GET64 STORAGE /* ASSUME 64-BIT */ > LTR R15,R15 /* DID IT WORK? */ > BZ ... /* YES, CONTINUE */ > GET31 STORAGE /* FALL BACK TO 31-BIT */ > > I would expect this to be second nature to just about everybody on this list. > > = > > > >> Date: Mon, 17 Jun 2013 00:29:13 -0400 >> From: scott_j_f...@yahoo.com >> Subject: Re: 64 bit question >> To: ASSEMBLER-LIST@LISTSERV.UGA.EDU >> >> Thanks Peter and Lizette ...the clarification is excellent much appreciated >> >> Scott ford >> www.identityforge.com >> from my IPAD >> >> 'Infinite wisdom through infinite means' >> >> >> On Jun 16, 2013, at 8:17 PM, Lizette Koehler <stars...@mindspring.com> wrote: >> >>> Thanks for the clarification >>> >>> Lizette >>> >>> -----Original Message----- >>> From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] >>> On Behalf Of Peter Relson >>> Sent: Sunday, June 16, 2013 3:39 PM >>> To: ASSEMBLER-LIST@LISTSERV.UGA.EDU >>> Subject: >>> >>>> System will always be able to answer a request for 64 bit - If you make >>> it >>>> conditional it will tell you that it resolved from below the bar (if >>>> the area above the bar is exhausted). Scott, what would stop you using >>>> z-arch-instructions to handle it? >>> >>> That is not the way 64-bit storage works in z/OS. You can request. If you >>> request conditionally, you get a return code back if not available (such as >>> by 'too small MEMLIMIT'). >>> It is then up to you to request below-2G storage by the normal means. If you >>> request unconditionally, you abend if not available. >>> >>>> My issue is more trying to allocate a 64 bit storage and it failing >>> Just about any request for storage can "fail". It is up to you to decide >>> what to do when it does, such as 'try something else'. >>> >>> Peter Relson >>> z/OS Core Technology Design
