Does anyone even have any of that fiche that was not tossed out? .
---------------------------------------------------------------------------- ---- This electronic mail (including any attachments) may contain information that is privileged, confidential, and/or otherwise protected from disclosure to anyone other than its intended recipient(s). Any dissemination or use of this electronic email or its contents (including any attachments) by persons other than the intended recipient(s) is strictly prohibited. If you have received this message in error, please notify us immediately by reply email so that we may correct our internal records. Please then delete the original message (including any attachments) in its entirety. Thank you -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Seymour J Metz Sent: Tuesday, November 22, 2022 7:41 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: End of several eras ObFicheInABarrel I found and reported two integrity errors in OS/360 from reading the fiche. That's in addition to relying on them for local modifications. My experience was that I had to read the fiche for things that should be in the PLM and I had to read the PLM for things that should have been in the macros or services manual. 0A0C -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of g...@gabegold.com [g...@gabegold.com] Sent: Monday, November 21, 2022 7:06 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: End of several eras Fiche was fun. Up to 370/148, microcode fiche was provided, including microcode problems. Browsing, I found one problem described as, "When LM instruction specifies same register twice -- that is, to load one register -- all 16 registers are loaded". Oops. And once, working on an interesting but stupid project that involved validating opcodes behaving properly (because management heard loony advice from an alleged industry expert that 4341 wouldn't be fully compatible architecture) several opcodes that shouldn't have existed did, didn't 0C1. Microcode fiche revealed that they were assist instructions for VS/1, etc. On Mon, 31 Oct 2022 23:46:40 -0500, Brian Westerman <brian_wester...@syzygyinc.com> wrote: >I agree, I can't possibly convey how much I learned from some old IBM fiche that I had access to in the computer center when I just started college. The first really important thing I wrote (I was 17) were mods to pass the condition codes from step to step within JES2 and then send the highest one to the console and syslog at job end. I later learned that others had done the same thing, and long before me, but I learned a lot. That code didn't work with the first version of MVS I was exposed to after college, so it was followed by doing that same thing with two jes exits and then even later writing our companies Automation software that pulls the condition codes from the same fields they were placed in originally way back then. > >Everything I have written over the years is still based on concepts and techniques that I first learned by looking at the code in the IBM fiche. > >I had an extra advantage in that I worked for IBM throughout that same time and was able to see some truly spectacular coding techniques and I am truly thankful for that opportunity. > >I realize that IBM wanted to keep nefarious people from copying the code, but I think that we lost a great deal of experience and expertise when we lost access to the code. Some of those techniques are just not around for people to examine and learn from, and that's very sad. > >Brian > > > >On Mon, 31 Oct 2022 19:42:50 -0400, David Spiegel <dspiegel...@hotmail.com> wrote: > >>Hi Tom, >>1983, eh? >>The same year as the (expletive deleted) OCO policy. >>I've seen IBM-lifers defend it on this forum, yet, it still did not/does >>not make sense. >> >>Regards, >>David >> > >---------------------------------------------------------------------- >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 ---------------------------------------------------------------------- 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
