>From the program's point of view the content of the PSA changes, although 
>actually the PSA content has stayed the same, the program is just looking at a 
>different one.

It's like looking out the window of a train at "the station." You look two 
minutes later and "the station" is different, although actually the station has 
not changed, you are just looking at a different one.

Charles

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of Vernooij, CP (ITOPT1) - KLM
Sent: Wednesday, February 24, 2016 4:54 AM
To: [email protected]
Subject: Re: Prefix save area - confused

'Doesn't the PSA contents change at that point ?' ==> No, each PSA remains the 
same. The program's PSA-pointer is just set to the PSA of the processor it runs 
on.

'as the PSA is no longer the same' ==> there is no 'the PSA' there are many 
PSAs. 'The' PSA a program sees, is the PSA of the processor it runs on.

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