> Doug McIlroy <doug@cs.dartmouth.edu> wrote:
>
>>
>>> How long was research running on a PDP-11 and when did they move to a VAX?
>>
>> London and Reiser had ported Unix to the VAX, replete with virtual memory, in 1978. By the time v7 was released (1979), Vaxen had become the workhorse machines in Research.
>>
>> Doug
>
> So, what's the story on why the London/Reiser port didn't get adapted
> back by Research, and they ended up starting from 4.1 BSD?
>
> Thanks,
>
> Arnold


Sorry, what I said about London/Reiser is true, but not the whole story. L/R didn't have demand paging; BSD did.

Doug