Some variants of POST LINKAGE=BRANCH do save most registers; some do not. The authorized assembler reference is quite clear on this subject.
You're right that in the most extreme case, only register 9 is preserved. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- 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
