Absolute addresses 0-23 (x'0'-x'17' have an assigned role during IPL; the initial PSW is in 0-7. After that, it whatever the OS puts there. What you're seeing could be a copy of absolute 0-7 after IPL.
________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Hank Oerlemans <[email protected]> Sent: Wednesday, November 24, 2021 5:58 PM To: [email protected] Subject: PSA 0 A random neuron thinks there was an announcement but if anyone can shed some light I'm curious about Address 0. I am used to seeing X'000A0000' then X'000130E1' in the first 8-bytes. This is no longer so. All zeros. A good thing ! SA22-7832-12 of Pops doesn't mention anything in CH. 3. So was there any kind of announcement for z/OS 2.5 ? Hank ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
