> R3 seems to be being loaded with the virtual address of the PCCA. 
> 
> 520 (208) ADDRESS 4 PSAPCCAV - VIRTUAL ADDRESS OF PCCA
> 
> Does anyone know if that moved from below to above the line in 1.13?

  As of z/OS 1.12, when there is more than one CPU, the LCCA and 
PCCA are above 16M by default.  You can force them below 16M 
by specifying CBLOC VIRTUAL24(IHALCCA,IHAPCCA) in the DIAGxx
specified pointed to by IEASYSxx.

  Of course, your program does not have serialization to 
the PCCA it is accessing, so it has always been subject to possible
random 0C4 abends if a CPU gets CONFIGed OFFLINE while your program
is accessing its PCCA. 

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

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