9 Dec
2017
9 Dec
'17
1 p.m.
On Fri, 8 Dec 2017, Warner Losh wrote:
OK. I'm confused. Maybe people here can help me
understand.
Looking at the V7 sources, it looks for all the world like they were
released Jan 10, 1979. This release was PDP-11 only. So far, so good.
32V, a port to the VAX, is listed as 'early 1979'. Dates in the files in the
archive suggest March 26th, 1979 (though there are dates as late as May 3rd
and April 30th on two files that are trivial). The tape we have in the
archive has a date Feb 22, 1980 written on it. Given the dates, that's only
3 months after V7 was released. This seems very fast, but maybe it's OK
since it's a swapping release....
3BSD, The Berkeley 32V has file dates as late as Mar 22, 1980... This seems
reasonable for turning V7 from swapping into paging... about a year is fast
but not crazy fast.
My question is: did these three events really happen in this quick
succession? Did USDL folks get started with a preliminary V7 for V32 or was
the port really done in 2 and a half months? Likewise with UCB and 3bsd: did
they start early?
Bell got their VAX in Feb. 1978.
London and Reiser ported Unix to it and was multi-user in April.
Then spent five months to clean up for internal release in the Fall.
UCB purchased their VAX in the Fall.
Bell sent their prototype 32/V to Berkeley.
Bell's paging work began in late 1978.
Berkeley's own work from swap to paging began in late spring of 1979.
(Joy presented about this PUNIXVAX in June 1979 UNIX Conference.)
32/V did come out a few weeks after System 7.
By mid November, the Berkeley virtual memory code was in use
and was expected to be available for others by early December.
Berkeley's "Virtual Vax/UNIX" was available for students after
Christmas (1979) break.
BSD distribution to others began in January 1980.
The Kashtan performance evaluation versus VMS (with benchmark code) was
done very soon after. (And Joy's fixes in March.)
(I did a few interviews specifically related to this. I have long
chapters about this and I can provide my references/citations when I get
back from a trip I am on.)