Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!mcvax!botter!ark!gijs
From: gijs@ark.UUCP (Gijs Mos)
Newsgroups: net.micro.atari16,net.micro.amiga,net.micro.68k
Subject: Re: 68000 Memory Managment
Message-ID: <767@ark.UUCP>
Date: Thu, 14-Aug-86 20:28:31 EDT
Article-I.D.: ark.767
Posted: Thu Aug 14 20:28:31 1986
Date-Received: Sun, 17-Aug-86 06:13:17 EDT
References: <508@elmgate.UUCP>
Reply-To: gijs@vu44.UUCP (Mos Gijs)
Organization: VU Informatica, Amsterdam
Lines: 25
Keywords: 68000 atari amiga 68k mmu
Xref: mnetor net.micro.atari16:1612 net.micro.amiga:4281 net.micro.68k:1133

In article <508@elmgate.UUCP> jdg@elmgate.UUCP writes:
...
>If memory serves me correct the 68000 can not restart/resume a bus faulted
>instruction.  So regardless of what mkind of MMU you try to hang on it, it
>can not overcome this problem.   ...

The Motorola Programmers Reference Manual (page 45, MC68000/68008):
	...
	Although this information is not sufficient in general to effect full
	recovery from the bus error, it does allow software diagnosis.
	...
You cannot do virtual memory, you cannot auto-allocate stack space, but you
*can* do multitasking. 

-- 
Gijs Mos

EUNET:    gijs@vu44  ({seismo,philabs,decvax}!mcvax!vu44!gijs)
BITNET:   u00131@hasara5
MAIL:     Gijs Mos
          Vrije Universiteit
          Biologisch Lab.
          De Boelelaan 1087
          1081 HV  Amsterdam
PHONE:    +31 20 5485705