IBM Mainframe Discussion List <[email protected]> wrote on 10/27/2006 
07:23:43 PM:
 
> BTW, what's the rationale for the maximum of 2096128K?
> 2096129 = 0x1FFC01, and 2096129*1024 = 0x7FF00400, which fit
> comfortably in 21-bit and 31-bit fields, respectively.  It seems
> to me that the reasonable choice of limit would be 2097151, since
> 2097151*1024 = 0x7FFFFC00, the largest multiple of 1024 that can
> be represented in 31 bits (2097151 = 0x1FFFFF).

 See module IEFVJA, which is not OCO.  Apparently, 2096128K is
chosen because it is equal to 2047M, and 2047 is the the largest M
value accepted by IEFVJA.  All of these numbers are larger than 
what could ever be obtained as region anyway, given that
SQA+CSA+LPA+NUC will be many megabytes. 

Jim Mulder   z/OS System Test   IBM Corp.  Poughkeepsie,  NY

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