Wasn't R0 used (at one time) for the message id to link multiline WTOs together?
David Elliot zSeries Software Support -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of McKown, John Sent: Thursday, September 16, 2010 12:33 PM To: IBM-MAIN@bama.ua.edu Subject: Question on WTO macro - Programming requirements In: http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/IEA2A990/88.1.2 it states: "You should clear register 0". But it doesn't say why. Nor does it indicate whether it means the 32 bit portion or the 64 bit portion. I guess it doesn't really matter since GPR0 is "volatile", but I am curious. 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 ---------------------------------------------------------------------- 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
