> >>For diagnostic purposes, then 4K page at 7FFFF000 is always > >>left invalid in z/OS. > > > >That makes the highest numbered, accessible byte to be at address x'7FFFEFFF' > > > That might be due to a requirement of ANSI C that there always be an address > algebraically greater than that of any accessible object, for loop termination > conditions.
Not likely. It has been that way since the first release of MVS/XA, circa 1982. That was a time when MVS still ruled with arrogance, and it would takes some doses of marketplace reality changes a few years later before MVS became interested in accommodating C and Unix. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
