Re: Re: Wait State 00050064

On Fri, 20 Sep 2019 at 11:44, Robert Schreiber [email protected] wrote:

> I did a lot of tracing, etc and found that NIP (Nucleus Initialization Program) was
> getting an 80A abend by asking for a huge amount of memory. What was going on is that
> bytes 6-7 in the result of an STIDP instruction was being used to calculate the amount of
> memory get. I have no idea what MVS is try to accomplish here--this has to be an MVS bug.

It's not.

> Referring to SA22-7201-08, Pages 10-90/91:

That's your problem. You're looking at a post S/370 architecture PofO.
If you look at the S/370 Principles of Operation (e.g. the -10 at
Bitsavers), you'll see that the rightmost two bytes from STIDP contain
the maximum length of the Machine Check Extended Logout (MCEL) for
this machine. A perfectly reasonable thing to do a GETMAIN for.

> "The format bit (F) in bit position 48 specifies the format of the first two
> digits of the CPU identification number."

Not in S/370.

Tony H.