> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[email protected]] On Behalf Of Binyamin Dissen > Sent: Monday, March 14, 2011 12:43 PM > To: [email protected] > Subject: Re: PSAAOLD question - when is it updated? > > PSAAOLD is ALWAYS the home address space. > > A PC-SS causes the SWITCHED TO address space to become the > PRIMARY. The > secondary is set based on the PC definition, but is typically > the previous > primary. > > PSAAOLD is NOT changed by the hardware (other than setting it > directly). The > "fixed by architecture" in this context is MVS(software) > architecture. Too > many programs expect to find the ASCB pointer there.
Ah! Like x'10' always pointing to the CVT. Or PSATOLD pointing to the running TCB. The fog begins to dissipate. > > How is the resource manager established? HOME=*MASTER* > typically means an > address space resource manager, which means that there ain't > no TCBs available > in the terminating memory. Well, this code is definitely expecting a valid TCB address or x'0's. It "went bad" trying to get the SSIB address for a job (in the HASN) when the Master Scheduler address space was the PASN. > > Actually, TCBs are usually at the same addresses. Wouldn't that depend on other activity in the two address spaces? Initial TCBs, yes. But user attached TCBs? Well, I'll take your word for it. > > Finally: > > EPAR Rx > L Ry,PSAAOLD-PSA > CH Rx,ASCBASID-ASCB(Ry) Thanks for that code! I even understand it (wonder of wonders). -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * [email protected] * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
