Newsgroups: comp.lang.c
Path: utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: PDP-11 data and function address spaces
Message-ID: <1989Nov18.225830.23535@utzoo.uucp>
Organization: U of Toronto Zoology
References: <530@dftsrv.gsfc.nasa.gov> <225800239@uxe.cso.uiuc.edu> <11567@smoke.BRL.MIL> <20642@mimsy.umd.edu> <1989Nov9.200332.8763@utzoo.uucp> <5121@ncar.ucar.edu> <11588@smoke.BRL.MIL> <6958@ficc.uu.net> <1989Nov15.165806.21515@utzoo.uucp> <6989@ficc.uu.net>
Date: Sat, 18 Nov 89 22:58:30 GMT

In article <6989@ficc.uu.net> peter@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@zoo.toronto.edu