On 01/22/2016 01:40 PM, Anne & Lynn Wheeler wrote:
other trivia from ibm jargon:
MVM - n. Multiple Virtual Memory. The original name for MVS (q.v.),
which fell foul of the fashion of changing memory to storage.
MVS - n. Multiple Virtual Storage, an alternate name for OS/VS2
(Release 2), and hence a direct descendent of OS. OS/VS2 (Release 1)
was in fact the last release of OS MVT, to which paging had been
added; it was known by some as SVS (Single Virtual Storage). MVS is
one of the big two operating systems for System/370 computers (the
other being VM (q.v.)). n. Man Versus System.
Helpful, because I am preparing yet another MF intro,
where the acronyms seem to be what confuse non-mainframers more than
anything else.
Where do you place VSE? (since it's not one of "the big two")
Lineage of TPF would also be interesting.
as part of the "Man Versus System" theme ... it had become significantly
much easier to work out lots of computer concepts and design on
vm370/cms ... and then later port the implementation to MVS ... than
trying to start on an MVS base.
some time ago, I got a request about the history of adding virtual
memory to all 370s ... old post with exchange from IBMer involved (who
recently passed) with references of os/v2, future systems, hasp/asp,
etc
http://www.garlic.com/~lynn/2011d.html#73
other parts of the thread
http://www.garlic.com/~lynn/2011d.html#71
http://www.garlic.com/~lynn/2011d.html#72
http://www.garlic.com/~lynn/2011d.html#74
Got into some discussion with Alan Altmark about VOL1 on IBMVM.
Track-and-record formatting is common with MVS, though VSE and VM (both
CP and CMS) have less need of it. (Well ... until SSI in the VM world
got an artificial dependency.)
Linux doesn't care, and actually works better (for a Linux/Unix person)
when storage is just blocks.
(Track and record boundaries are discarded.)
So things like DASD labeling are software artifacts that give the
illusion of being hardware feature, adding yet more kon-foo-zhun to the
newcomers.
-- R; <><
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