PDP-11 data and function address spaces

[Henry Spencer]

In article <6989 at ficc.uu.net> peter at ficc.uu.net (Peter da Silva) writes:
>> >I think the 11/24 did, too. Or maybe I'm thinking of the 11/23+?
>
>> No.  Neither had split-space.
>
>I'm pretty sure the LSI-11/23+ did. Or are you differentiating between the
>LSI-11 and PDP-11.

The difference between the 23 and 23+ was that the *physical* address space
got larger.  (Specifically, DEC started using some extra bits that the MMU
was already producing.)  The CPU remained unchanged, and its MMU did not
implement split space.
-- 
A bit of tolerance is worth a  |     Henry Spencer at U of Toronto Zoology
megabyte of flaming.           | uunet!attcan!utzoo!henry henry at zoo.toronto.edu