Is there an **EASY** way to give IPCS an address and have it tell me:
(1) the storage key and (2) whether it is fetch protected?

BACKGROUND:
We implemented a new SMS managed tape system over the weekend. Part of
the installation was to implement the OAM exits: CBRUXEJC, CBRUXENT, and
CBRUXVNL. This morning at 3 a.m., the CBRUXVNL got an S0C4/PIC 4 at +0.
This is a branch instruction. The only way that I know of to get an S0C4
on a branch is if the memory containing the branch is fetch protected
and not in the CPU PSW key. In this case the CPU PSW key was 1 (not 8 or
0). What really concerns me is that this abend occurred in a CA-VTAPE
started task. I don't know why the exit was being invoked. I looked at
the parameter list being sent and the tape volser was 368057, which is
not an SMS managed tape! It is an old, manual, 3490E cart. Which is
correct in this case. Why was the VNL exit being driven, and by whom?
No, that volume is not registered in the TCDB, I double checked.

--
John McKown
Senior Systems Programmer
UICI Insurance Center
Information Technology

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