On Thu, Jan 12, 2017 at 8:58 AM, Martin Truebner <mar...@pi-sysprog.de>
wrote:

> John,
>
> i have no clue about the hardware-
>
> one thing: the XC can only be used to clear it- the MVHI could be used
> to create any memory-configuration possible into the half-word- so...
>
> The stmt ".... product's documentation said it was supported on a
> z9" is correct if it continues with
>
>  ... "---when compiled with the right archlvl"
>
> just saying
>

​True. Just continuing in my "research", I noticed that the program in
question _was_ compiled on z/OS 2.2 (we are z/OS 1.12!) and _appears_ to be
written in C (just from looking at some of the stuff inside it such as
seeing "sprintf"). Interestingly, the z/OS 2.2 C compiler does support
ARCH(7) for the z9. But ARCH(8) is the default starting with z/OS 2.2. But
the TARGET, to set the LE level, only goes "down" to z/OS 1.13 (it was 1.12
in 2.1 because I remember when I used C on a 2.1 system which is now 2.2).​



>
> Martin Trübner; everything around "PoOps of z/arch"
>



-- 
There’s no obfuscated Perl contest because it’s pointless.

—Jeff Polk

Maranatha! <><
John McKown

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