On Tue, 28 Mar 2017 13:04:10 -0400, Steve Smith wrote:
>
>I presume IBM would like to deprecate and retire dataspaces completely,
>although the eternal backward-compatibility may prevent that for 100 years
>or more.
> 
(Wow!  We're halfway there!)

My impression, also.  Is there anytning possible with AR-mode that can't be
done with AMODE 64?  (May I assume that AR mode-mode and AMODE 64
are mutually exclusive?)

What's the peformance consequence of AR-mode?  I might expect it to be
slower than AMODE 31 but faster than AMODE 64.

I feel similarly about page protection keys.  Segment protection should make
them obsolete.

-- gil

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