On Mon, 2 Jun 2025 at 17:48, Binyamin Dissen <
[email protected]> wrote:

> The doc for TAR states
>
> "The operation does not depend on the translation mode — bits 5, 16, and
> 17 of
> the PSW are ignored."
>
> But when I issue it in primary mode I am getting CC=3 but when in AR mode
> the
> expected condition code.
>

You've been around long enough to know how unlikely it is that the
implementation on your machine differs from the PofO. Not impossible,
certainly, but very very unlikely. Maybe a bit more likely on a zPDT, but
even there they've done a very good job, and presumably have much the same
tools and test cases as the Real Iron people have.

So... SLIP (or whatever) and look at your registers, ARs, etc. for both
cases. It is a bit annoying that there doesn't seem to be a way to see
exactly which exception caused the CC=3, but I'm betting you'll find some
difference in your regs or ARs.

Tony H.

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