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
