> Is the highest 31-bit address 7FFFFFFF or 7FFF0000? > I ask because the largest region size you can request is 2096128K or > 2047M, and 2096128 * 1024 = 2,146,435,072 (x7FF00000).
For diagnostic purposes, then 4K page at 7FFFF000 is always left invalid in z/OS. 2047M is considerably larger than a region size could ever be, since above and below 16M are separate regions. The maximum region above 16M is constrained by 2048M - 16M - (ENUC + ELPA + ECSA + ESQA). 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
