2.11BSD is available from the Archives in various forms. (From memory)  
the 11/44 and up, with the exception of the 11/60, had split I/D  
address spaces of 64KBytes each.

[mutters to self... really must resurrect the 11/44 or 11/84.]

On May 5, 2010, at 10:02 PM, Larry McVoy wrote:

> 2.9BSD, as I recall, was the last release for PDP-11's.  Again, as I
> recall, it did a pile of work to take advantage of the larger address
> space (I think there was 64KI and 64KD).
>
> I don't recall every seeing a 3BSD release.
>
> On Wed, May 05, 2010 at 08:40:12PM -0500, Jeremy C. Reed wrote:
>>> Or is this simply because "2BSD" is not a operating system release  
>>> per
>>> se, so "3.0BSD" is correct?
>>>
>>> But this makes me wonder if my 2BSD versions are newer than first
>>> 2BSD, so really 3BSD is correct for some of this.
>>
>> I was asked off list what version of 2BSD as it may have been the 4.x
>> stuff backported. So it is the 2bsd.tar.gz from the minnie.tuhs.org
>> archive (which is near identical to the spencer_2bsd.tar.gz). Its  
>> TAPE
>> file says: May 10, 1979. The READ_ME says: Thu Apr 19 23:25:43 PST  
>> 1979.
>> And don't see any date stamps included in any files newer than May  
>> 1979.
>> (So not a backport since is 8 months older than 3BSD and 17 months  
>> older
>> than 4BSD.)
>> _______________________________________________
>> TUHS mailing list
>> TUHS at minnie.tuhs.org
>> https://minnie.tuhs.org/mailman/listinfo/tuhs
>
> -- 
> ---
> Larry McVoy                lm at bitmover.com           http://www.bitkeeper.com
> _______________________________________________
> TUHS mailing list
> TUHS at minnie.tuhs.org
> https://minnie.tuhs.org/mailman/listinfo/tuhs
>

--
Milo Velimirović
Unix Network Administrator - ITS Network Services
608.785.6618 Office -  608.386.2817 Cell
University of Wisconsin - La Crosse
La Crosse, Wisconsin 54601 USA   43 48 48 N 91 13 53 W