To clarify further,after SU7 killed DSS, SHARE passed a requirement to continue support of DSS and the massive change required to do so turned out to be one line of code. All seemed well until MVS/SE R2, when a prerequisite SU again killed DSS, but that time IBM refused to budge.
Yes, DSS was also available on OS/VS1 and SVS. This fiasco was the reason for my paraphrase from the Scottish Play. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of Tony Harminc [t...@harminc.net] Sent: Tuesday, December 6, 2022 9:11 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Computers On Tue, 6 Dec 2022 at 07:30, Steve Beaver <st...@stevebeaver.com> wrote: > DSS. Data Set Services > Presumably he doesn't mean *that* DSS. Dynamic Support System was an OS/VS standalone debugger that allowed setting breakpoints, displaying storage, and so on, including in dodgy places like SVC routines and interrupt handlers. While using its console command interface the entire OS was suspended. IIRC DSS came along with SVS and VS1, and was continued into MVS, but not for long. To invoke it you'd set a magic byte in low storage, and then hit the Restart key. Of course people wrote little started tasks that would set the byte and fake the Restart interrupt to make it easier to use. Tony H. > On Dec 6, 2022, at 06:21, Jay Maynard <jaymayn...@gmail.com> wrote: > > > > OK, this is a new one on me. What's DSS? > > > >> On Tue, Dec 6, 2022 at 6:09 AM Seymour J Metz <sme...@gmu.edu> wrote: > >> > >> MVS/SE installed on an OS/VS2 base; for R1 it was 3.7 with prerequisite > >> selectable units and for R2 it was 3.8 with prerequisite selectable > units. > >> In each case a prerequisite SU killed DSS. MVS/SP replaced MVS/SE > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
