On Tue, 28 Mar 2017 08:32:49 -0700, Ed Jaffe wrote:
>On 3/28/2017 8:23 AM, Tom Marchant wrote:
>>
>> I could be wrong, but I don't think that the hardware cares about
>> data spaces. A data space is an address space that contains no
>> operating system information, including Nucleus, LPA, CSA, and SQA.
>
>The hardware does not perform ALET-qualified instruction fetch.
>
That agrees with:
z/OS 2.2.0
z/OS MVS
z/OS MVS Programming: Assembler Services Guide
Using access registers:
... ARs are used when fetching and storing data, but they are not used when
doing branches.
(which seems to be a software manual describing a hardware feature.)
-- gil
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