Charles, Exactly, what is being done under the covers, i.e; microcode etc ..
Scott On Wed, Aug 28, 2019 at 10:49 AM Tony Harminc <t...@harminc.net> wrote: > On Wed, 28 Aug 2019 at 09:59, Charles Mills <charl...@mcn.org> wrote: > > > In answer to your question, I guess the answer is no. There is a DAT > "facility" (some of us remember when there was a DAT box!) but no, there is > no named "PC facility" any more than there is a "BAL facility." It's just > part of the processors. > > It's arguable that ASN translation is (usually) the part of the > architecture that corresponds best to DAT in the context of PC and PR > instruction processing. But not all PCs invoke ASN translation, and > those that do do it a bit differently than how it is described in > Chapter 3. > > But really, as Binyamin said, the excruciating details of what PC > *does* are covered in the POPS, both under the PC instruction itself, > and in Chapter 5 in the section "Stacking Process" under "Linkage > Stack Operations". > > Tony H. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- Scott Ford IDMWORKS z/OS Development ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
