On Thu, 4 Feb 2021 19:44:00 -0500 Tony Harminc <t...@harminc.com> wrote:
:>On Thu, 4 Feb 2021 at 18:12, Steve Smith <sasd...@gmail.com> wrote: :>> The instruction is IAC, in PoOp Chapter 10. :>Hmmph... I never noticed that one. I use EPSW (generally R0,0) and the :>appropriate TMLx instruction(s) to examine whichever bits I'm :>interested in. IAC has the advantage of setting the condition code :>directly based on the AS bits, but EPSW is more general, and is not a :>semi-privileged instruction subject to extraction-authority control :>(though I doubt that matters in most z/OS environments). IAC also provides the value needed for SAC, should you wish to restore it. It would have been nice if there was also an IAM/SAM set rather than needing to use the TAM condition code to decide which variant of SAM to issue. -- Binyamin Dissen <bdis...@dissensoftware.com> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies.
