> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:ibm-m...@bama.ua.edu] On Behalf Of Paul Gilmartin > Sent: Tuesday, September 14, 2010 10:23 AM > To: IBM-MAIN@bama.ua.edu > Subject: Re: z/OS V1.12 differences and z196 (the new > mainframe) impacts > > On Tue, 14 Sep 2010 11:04:47 -0400, David Cole wrote: > >> > >>Except for regs 0,1,15 your assertion is true. > >> > >>The high halves of those regs are not preserved across any interface > >>unless otherwise documented. > > > >This is in contradiction to a verbal statement he made at a > >presentation several years earlier wherein he flatly stated that no > >preexisting AMODE(24/31) program would ever behave differently (due > >to the widening of the registers) when run in z/OS vis-a-vis OS/390. > >Unfortunately, I don't have "the video". > > > Ah, semantics! Can a program run in AMODE(24/31) in OS/390 > (in a supported configuration) and use grande registers? > > -- gil
Sure. Why not. I use them for 64 bit numbers where I used to use a register pair. Can OS/390 run on z hardware? I don't remember anymore. But use of Grande registers in application code cannot be stopped by the OS. Of course, if you call other routines, you'd better store them yourself. Because somebody else might be doing the same. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * (817)-691-6183 cell john.mck...@healthmarkets.com * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM ---------------------------------------------------------------------- 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
