Re: [TUHS] Unix quix

[Warner Losh <imp@bsdimp.com>]

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On Wed, Jan 22, 2020 at 10:54 AM Warner Losh <imp@bsdimp.com> wrote:

>
>
> On Wed, Jan 22, 2020 at 7:59 AM Dan Cross <crossd@gmail.com> wrote:
>
>> Btw, the answer for #16 is `cagbef`: but `g` is not an option. I would
>> think the answer would be `cafbde`. Apparently in the original, option
>> '(d)' is missing; one imagines that was to trick the unwary who failed to
>> adequately read the question.
>>
>
> I think this is wrong:
> 16. Q:  Sort the following into chronological order: a) PWB 1.2, b) V7, c)
> Whirlwind, d) System V, e) 4.2BSD, f) MERT.
> A: cagbef
> Whirlwind is a ringer.
>
> So the MERT ACM paper is 1975. The BSTJ is July/Aug 1978 (received Feb
> 1978). Somewhere I read (don't have a handy reference for it) that MERT
> ported V4 as a supervisor process which puts it in 1974 or so. In any
> event, this predates everything except Whirlwind which I can't find a paper
> for.
> PWB 1.2 is based on V6 + stuff. PWB 1.0 was released 1977, but we don't
> have an extant 1.2 tape to verify dates with, but 1978 wouldn't be
> unreasonable.
> We know 7th Edition was released Jan 1979 (PWB 2.0 was released, 1980
> sometime)
> System V was released January 1983
> 4.2BSD was released September 1983 (4.1c was released in 1982 though :)
>
> So that would make the right answer c f a b d e
>
> Even DMERT for the 3B20 was released in January 1983 (or the IEEE paper
> for it was released then), so it can't be last.
>
> I also have questions about this:
>
> 81. Q:  What was the first Unix network?
> A: spider
> You thought it was Datakit, didn't you? But Sandy Fraser had an earlier
> project.
>
> When did Alexander G Fraser's spider cell network happen? For that matter,
> when did Datakit happen? I can't find references to either start date on
> line (nor anything on spider except for references to it in Dr Fraser's
> bio). I can find references to Datakit in 1978 or so.
>

Oopa, spoke one google search too soon. I found this:

"Sandy (A. G.) Fraser devised the Spider local-area ring (v6) and the
Datakit switch (v7) that have served in the lab for overadecade. Special
services on Spider included a central network file store, nfs, and a
communication package, ufs. Datakit, a ‘‘central office’’ for data
communication, gav e added impetus to research in distributed computing.
Fraser undertook the Unix Circuit Design System (see CDL in section 4.3) to
support his hardware projects"

in "A Research UNIX Reader: Annotated Excerpts from the Programmer’s
Manual, 1971-1986" by Doug Mcillroy.


> I  thought the answer was "ARPANET" since we had a NCP on 4th edition Unix
> in late 1974 or early 1975 from the University of Illinois dating from that
> time (the code in TUHS appears to be based on V6 + a number of patches).
>
> Warner
>
>
>>         - Dan C.
>>
>>
>> On Wed, Jan 22, 2020 at 4:32 AM Rob Pike <robpike@gmail.com> wrote:
>>
>>> The answers are up:
>>>
>>> https://commandcenter.blogspot.com/2020/01/unix-quiz-answers.html
>>>
>>> -rob
>>>
>>>

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