Re: EPSILON?
I don't see any Multics there, and I doubt that it would be easy to port Multics to EPSILON. While S/38 et al were spinoff's from אֶפֶס (FS), I don't believe that it is accurate to say that they *were* FS. My first reaction was that EPSILON was a poster child for premature binding; I was reminded of a project at TI (SYMBOL? SYMBL?) that had a compiler in hardware; fixing bugs could get expensive. To be fair, that was 24 bit addressing within each space; there was no limit set for the number of spaces. Still, I agree that it lacked vision and was a step backward from the 360/67. It didn't look like the author had thought through all of the issues. It looked either too ambitious or not ambitious enough. Was EPSILON the origin of ECPS:VSE? -- 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: Wednesday, May 27, 2020 5:04 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: EPSILON? I stumbled across a book on bitsavers http://secure-web.cisco.com/12Ot81bfjTTLWLXKFiRjoxUjnGi5pm87OqM23I4hRH7Bh1Ynxv5VXSug_kTE_6fCMo8T80jkyhiNj_f31h-BMikETYTSNb47viP2gCpWLa7OkT8xk8JKqg5plHvhEk7vm-RkPK73IO-4aqhR2zjyLfzKx8BJ0piWrUPyN6vDrII7c3Hb_ZfqKXrb3TVE2T0MAxtbLwTVpr7Nb4JkWpwGLWHFNJl4xjJDVV9EjENC-b25_elOC_RfI14no_zgusZYFu_Jk5cBvpEZToRCg0h7i55axduL_Bz9P2l7O-LTR9whRJfzcq_vK21uOQDYSMR9064kavZUSPcJJwxsjfLb_rL9RVbMj3xG2bon6uxgcywtACvvzslgsLgXjAnOpb4ryaZ5dfTp-rfnw5VA5TWoRAUjnzD3fGIcWLQnk6P2PkSXzZuj5ffXXRGHPYQXIzb30/http%3A%2F%2Fbitsavers.org%2Fpdf%2Fibm%2F370%2FEPSILON%2FPrinciples_Of_Operation_The_EPSILON_System_Oct1980.pdf dated 1976 that describes a follow-on system to S/360. It's an intriguing hybrid of S/360, Multics, and maybe IBM i (aka FS, System/38, AS/400, etc.) with some nifty ideas. On the other hand it seems to have quite limited vision in some ways, e.g. it has 24-bit main storage addressing, some concepts seem excessively hardcoded, and it's not obvious how it would be extended compatibly. The author is R.B. Talmadge, and there's no indication of his or her affiliation. I'd never heard of EPSILON before - does anyone here know anything about it? It was uploaded to bitsavers only in 2017. [Ah - I see an R.B. Talmadge wrote an article "Design of an integrated programming and operating system, Part II: The assembly program and its language" in the IBM Systems Journal in 1963. That seems to be about the 7094 and IBJOB.] Tony H. -- 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
Re: EPSILON?
Did you read the part in the manual about the general registers being 8 bytes long and containing an integer and and address part, one of them controlling the "space" and the other the address within the space? Sounds much like access registers to me ... but I didn't examine all the details. See Paragraph 2.8 in the document, page 18 of the PDF document. Kind regards Bernd Am 28.05.2020 um 08:31 schrieb Timothy Sipples: Unfortunately nobody is able to ask Richard B. Talmadge about his EPSILON ideas. According to this source he's no longer alive: https://www.maa.org/news/memoriam It'd be terrific if anyone who worked or interacted with him knows more about these EPSILON concepts. - - - - - - - - - - Timothy Sipples I.T. Architect Executive Digital Asset & Other Industry Solutions IBM Z & LinuxONE - - - - - - - - - - E-Mail: sipp...@sg.ibm.com -- 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
Re: EPSILON?
Unfortunately nobody is able to ask Richard B. Talmadge about his EPSILON ideas. According to this source he's no longer alive: https://www.maa.org/news/memoriam It'd be terrific if anyone who worked or interacted with him knows more about these EPSILON concepts. - - - - - - - - - - Timothy Sipples I.T. Architect Executive Digital Asset & Other Industry Solutions IBM Z & LinuxONE - - - - - - - - - - E-Mail: sipp...@sg.ibm.com -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: EPSILON?
Relationship to https://en.wikipedia.org/wiki/IBM_Future_Systems_project ? Timeframe of FS was 1971 to 1975. Perhaps Talmadge was a "sore loser" when FS was terminated? Charles -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Tony Harminc Sent: Wednesday, May 27, 2020 2:04 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: EPSILON? I stumbled across a book on bitsavers http://bitsavers.org/pdf/ibm/370/EPSILON/Principles_Of_Operation_The_EPSILON_System_Oct1980.pdf dated 1976 that describes a follow-on system to S/360. It's an intriguing hybrid of S/360, Multics, and maybe IBM i (aka FS, System/38, AS/400, etc.) with some nifty ideas. On the other hand it seems to have quite limited vision in some ways, e.g. it has 24-bit main storage addressing, some concepts seem excessively hardcoded, and it's not obvious how it would be extended compatibly. The author is R.B. Talmadge, and there's no indication of his or her affiliation. I'd never heard of EPSILON before - does anyone here know anything about it? It was uploaded to bitsavers only in 2017. [Ah - I see an R.B. Talmadge wrote an article "Design of an integrated programming and operating system, Part II: The assembly program and its language" in the IBM Systems Journal in 1963. That seems to be about the 7094 and IBJOB.] Tony H. -- 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
EPSILON?
I stumbled across a book on bitsavers http://bitsavers.org/pdf/ibm/370/EPSILON/Principles_Of_Operation_The_EPSILON_System_Oct1980.pdf dated 1976 that describes a follow-on system to S/360. It's an intriguing hybrid of S/360, Multics, and maybe IBM i (aka FS, System/38, AS/400, etc.) with some nifty ideas. On the other hand it seems to have quite limited vision in some ways, e.g. it has 24-bit main storage addressing, some concepts seem excessively hardcoded, and it's not obvious how it would be extended compatibly. The author is R.B. Talmadge, and there's no indication of his or her affiliation. I'd never heard of EPSILON before - does anyone here know anything about it? It was uploaded to bitsavers only in 2017. [Ah - I see an R.B. Talmadge wrote an article "Design of an integrated programming and operating system, Part II: The assembly program and its language" in the IBM Systems Journal in 1963. That seems to be about the 7094 and IBJOB.] Tony H. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
