> >> 1. As far as I know z/OS 2.2 will not run on z9 machine - is it true? > >> > >> 2. What message one can expect when trying to IPL the z/OS 2.2 on the > > z9? > > > > Wait state code 07B > > A required processor facility is not available. The wait state reason code > > identifies the missing facility. > > Well... > I managed to try IPL z/OS 2.2 on z9. > Got the following result: > > Central processor (CP) 0 in partition ABCDE, entered disabled wait state. > The disabled wait program status word (PSW) is > 00020000000000000000000000000019. > Central storage bytes 0-7 are: 000800008000063a40404040f0f04040. > > A description of 019 seems to be vague, but it can match the reason.
You are right, I forgot about that issue with z/OS 2.2. Since OS/390 2.10, the checking for required architecture facilities and loading a 07B wait state has been done at the beginning of NIP. But in z/OS 2.2, some IPL IRIM module was compiled with a machine level allowing z10 instructions, so on a pre-z10 machine, we get an operation exception in that module, which causes a 019 wait state to be loaded (the program check new PSW is simply a 019 wait state that early in IPL processing). In the next release, we have moved the architecture verification to be at the beginning of IPL, so that we will load a 07B wait state as intended. Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. Poughkeepsie NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
