TCBPKF remembers the original storage key set by the system in the same sense 
that general register 3 remembers the number X'5AD' after you load that number 
into register 3; i.e., the remembering lasts until something changes the value 
being remembered .  An authorized program can cause TCBPKF to remember 
something different, either by accident or design. 


Bill Fairchild 
Franklin, TN 


----- Original Message -----
From: "Shmuel Metz (Seymour J.)" <[email protected]> 
To: [email protected] 
Sent: Tuesday, May 28, 2013 9:31:06 AM 
Subject: Re: ECSA 

In <[email protected]>, on 05/27/2013 
   at 07:52 AM, Ed Jaffe <[email protected]> said: 

>On 5/26/2013 6:08 PM, Charles Mills wrote: 
>>> you need to save the key prior to the MODESET KEY=ZERO invocations 
>> Are you sure? MODESET KEY=NZERO,... won't "remember" for you? 

>ZERO and NZERO switch between PSW key zero and the PSW key in 
>TCBPKF. In that sense, TCBPKF is indeed always "remembering" the 
>task's original, non-zero key. 

I'd hardly call that remembering, and TCBPKF need not match the key 
just prior to the MODESET KEY=ZERO. 

-- 
     Shmuel (Seymour J.) Metz, SysProg and JOAT 
     Atid/2        <http://patriot.net/~shmuel> 
We don't care. We don't have to care, we're Congress. 
(S877: The Shut up and Eat Your spam act of 2003) 

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