Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!killer!tness7!tness1!nuchat!sugar!peter
From: peter@sugar.UUCP (Peter da Silva)
Newsgroups: comp.sys.amiga
Subject: Re: Amiga UNIX
Message-ID: <2127@sugar.UUCP>
Date: 15 Jun 88 19:22:33 GMT
References: <211@laic.UUCP> <3663@cbmvax.UUCP> <1872@sugar.UUCP> <134@ssdis <6469@cup.portal.com>
Organization: Sugar Land UNIX - Houston, TX
Lines: 18

In article <6469@cup.portal.com>, doug-merritt@cup.portal.com writes:
> Peter said:
> >As a side comment, the 128K limit *is* the reason paging wasn't
> >implemented on the '11... even though the hardware supported it.

> As I recall there was a problem also with restarting certain instructions
> (i.e. you couldn't restart them after a page fault in their middle).

Since PDP-11 UNIX used this capability to automatically extend the stack
frame of processes, and because just about any instruction could be used
in the stack, I doubt if there was any real problem here... at least not
for user mode instructions.

And ask the people who have ported the bourne shell to the 68000 what
sort of problems you'd expect if this didn't work right...
-- 
-- Peter da Silva      `-_-'      ...!hoptoad!academ!uhnix1!sugar!peter
-- "Have you hugged your U wolf today?" ...!bellcore!tness1!sugar!peter
-- Disclaimer: These may be the official opinions of Hackercorp.