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Re: DEBE?

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Anne & Lynn Wheeler <lynn@garlic.com> writes:
> 8. Did anything of LLMPS remain as part of UMMPS? 
> http://archive.michigan-terminal-system.org/discussions/anecdotes-comments-observations/8didanythingofllmpsremainaspartofummps
> 8.1: Some information about LLMPS
> http://archive.michigan-terminal-system.org/discussions/anecdotes-comments-observations/8-1someinformationaboutllmps

this has reference to (later?) LLMPS documentation at bitsavers, dtic,
and & mts archive
http://archive.michigan-terminal-system.org/documentation

topic drift warning ...

lots of installations were sold 360/67 for tss/360 ... but got early
360s to work with pending availability of 360/67 with virtual memory.
... however tss/360 never really came to production fruition and lots of
360/67s ran as 360/65 with os/360 ... but some places like UofM and
Stanford wrote their own virtual memory operating systems for 360/67.

Cambridge Science Center got a 360/40 and added hardware modifications
to support virtual memory and developed (virtual machine) CP40/CMS
... when 360/67 became available, CP40/CMS morphs into CP67/CMS
(precursor to VM370/CMS).

MIT Lincoln Labs got a duplex (two processor) 360/67 for tss/360 ... but
became the 1st place (after cambridge) to install cp67.

I had taken two semester hr intro to computers/fortran, the univ was
running 709 tape->tape with 1401 front end for unit record.  At the end
of the semester the got a 360/30 replacing the 1401 as part of
transition to 360/67 replacing the 709/1401 and I got a job to
reimplement 1401 MPIO (somewhat like DEBE) in 360 assembler (although
360/30 could directly run MPIO in 1401 emulation) ... I got to design
and implement my own monitor, device drivers, interrupt handlers, error
recovery, storage management etc. ... eventually 2000 cards with
assembler option for generating stand-alone (w/BPS loader) or under
os/360 (DCB macros). Trivia: stand alone version took 30mins to
assemble, os/360 version took an hr with each DCB macros taking 5mins
each.

I was then hired fulltime to be responsible of OS/360 and the 360/67
spent all its time as 360/65 ... univ. shutdown datacenter from 8am sat
to 8am mon & I had the place dedicated to myself for 48hrs
straight. Last week Jan1968, three people came out from cambridge to
install cp67 (1st place after lincoln labs) ... but it was mostly
restricted to my playing with it on weekends.


-- 
virtualization experience starting Jan1968, online at home since Mar1970

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DEBE? gareth evans <headstone255@yahoo.com> - 2021-02-01 14:33 +0000
  Re: DEBE? Peter Flass <peter_flass@yahoo.com> - 2021-02-01 11:45 -0700
    Re: DEBE? Peter Flass <peter_flass@yahoo.com> - 2021-02-01 11:50 -0700
      Re: DEBE? gareth evans <headstone255@yahoo.com> - 2021-02-01 19:40 +0000
      Re: DEBE? Anne & Lynn Wheeler <lynn@garlic.com> - 2021-02-02 10:06 -1000
        Re: DEBE? Anne & Lynn Wheeler <lynn@garlic.com> - 2021-02-02 14:13 -1000
  Re: DEBE? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-02-02 02:52 +0000
    Re: DEBE? Peter Flass <peter_flass@yahoo.com> - 2021-02-02 14:59 -0700
      Re: DEBE? Thomas Koenig <tkoenig@netcologne.de> - 2021-02-02 22:33 +0000
      Re: DEBE? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-02-03 18:30 +0000
        Re: DEBE? Peter Flass <peter_flass@yahoo.com> - 2021-02-03 12:34 -0700

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