ethan.dicks at gmail.com
Sun Jun 19 23:38:06 CDT 2005
On 6/19/05, Allison <ajp166 at bellatlantic.net> wrote:
> There are two versions of 2.11 if memory serves one with split
> I&D and one without.
I am not aware of a non I&D version of 2.11BSD... I used to do a bunch
with 2.9BSD on real hardware 18 years ago, and am pretty sure 2.9 is
the last one that runs on F-11 chips.
> I have to check but fuzzy memory says 11/23 had I&D or was that later
> with the J11? I distinctly remember the MMU of the 11/23 as being
> software compatable with 11/34, 11/69 and 11/70 (to the limits of
> Q18 or Q22).
The F-11 chip (11/23, 11/24) does not have split I&D. The J-11
(11/53, 11/73) does, as do some of the "big" Unibus machines of the
day (11/44, 11/70 to name two).
I'm not an exhaustive expert, though... I only have a couple of Split
I&D machines and I've never done much with them. Most of my -11 time
is on smaller and older machines.
> I know the Falcon, LSI-11/ and 11/2 did not even have MMU.
Right - 16 bit addressing only.
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