>> 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.


That makes the highest numbered, accessible byte to be at address x'7FFFEFFF'


--
Peter Hunkeler



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