Well ......... Actually most of a new PSW is loaded. The instruction address, AMODE and PSW key may be changed.
The POPs describing the PC instruction goes into excruciating details on how it works. On Wed, 28 Aug 2019 07:03:38 +0000 "Vernooij, Kees (ITOP NM) - KLM" <kees.verno...@klm.com> wrote: :>A PC instruction is just an Instruction, not an Interrupt, so there is no Interrupt handler involved and no new PSW loaded. :> :>Kees. :> :> :>> -----Original Message----- :>> From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On :>> Behalf Of SUBSCRIBE IBM-MAIN Anonymous :>> Sent: 28 August, 2019 8:36 :>> To: IBM-MAIN@LISTSERV.UA.EDU :>> Subject: Assembler :- PC Instruction :>> :>> I have a question on PC instruction for which I have been looking for an :>> answer for quite sometime now. According to "Priciples of operations" :>> manual, execution of an SVC instruction causes a new PSW to be loaded from :>> x'1C0' (SVC FLIH), and program interruption causes a new PSW loaded from :>> x'1D0' (Program Interruption FLIH). Now my question is what happens when a :>> "PC" instruction is executed. Does a new PSW gets loaded from a pre- :>> determined location (like SVC/program interrruption) or it's all handled :>> through some micro code? -- Binyamin Dissen <bdis...@dissensoftware.com> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
