On Thu, 28 Mar 2013 13:17:31 -0500, John Gilmore wrote:

>I did not find Kevin Kelley's post entirely persuasive.  This
>restriction long antedates 2 Kibyte pages, and the equation 8 x 2048 =
>32768 is thus historically irrelevant.
> 
The restriction to 32760 is new with z/OS 2.1.  Formerly it was 100.
I didn't feel the handful of bytes difference was onerous; I was
merely curious about the derivation of the number.  I find Kevin's
rationale more persuasive than you.

>Does the two-fullword---not doubleword?---prefix have the structure
>|?|?|?|?|?||?|?|c|c|, in which |c|c| is the length L >= 0 in bytes of
>the PARM value?
> 
A later followup said so.  And this nicely accommodated s/360 specifications
so long as the prefix was fullword aligned.

-- gil

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