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- Path: EU.net!sun4nl!xs4all!usenet
- From: jtv@xs4all.nl (Jeroen T. Vermeulen)
- Newsgroups: comp.sys.amiga.misc,comp.sys.amiga.programmer
- Subject: Re: toy operating systems, like AmigaOS
- Date: Sat, 20 Apr 96 13:46:09
- Organization: Leiden University, Mathematics & Computer Science, The Netherlands
- Message-ID: <19960420.7B94D10.C366@asd10-02.dial.xs4all.nl>
- References: <skllsf.984983.4.5@groomlake.mil> <4kplgo$o9r@canyon.sr.hp.com> <4ksu6q$haa@nadine.teleport.com> <31724980.226C@herts.ac.uk> <Dpy2GC.1nn@wiloyee.shnet.org> <4l4cda$dhn@daily-planet.execpc.com> <317680F0.1ADF@ba.ssdn.skellefte.se>
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-
- In article <317680F0.1ADF@ba.ssdn.skellefte.se> Johan R=?iso-8859-1?Q?=F6nnblom <JRo0605@ba.ssdn.skellefte.se>?= writes:
-
- > Isn't there a memory protection system for the Amiga? I heard about something called
- > 'Sushi', however, as I don't have a MMU I have not tested it. But still, even if you have
- > memory protection, couldn't a program still crash the computer, ie locking up the
- > processor or something, so that other programs are lost?
-
- Sushi doesn't require an MMU; it's just a little tool that redirects the output
- from *MungWall* (which doesn't require an MMU either) to a window.
-
- MungWall is a nifty util that adds "walls" of a few words with the same repeated
- value on either side of each AllocMem()'d block of memory, and when you
- FreeMem() it checks whether you've overwritten any of those words. It also
- fills completely unallocated memory with some easy-to-recognize value. Of
- course this doesn't actually protect your memory, but it helps detect bugs (at
- some performance cost, of course).
-
- But I do believe there is a test version of a memory protection system on Aminet
- called Hack-o-RAMa. This one, needless to add, does require an MMU.
-
- --
- ============================================================================
- # Jeroen T. Vermeulen \"How are we doing kid?"/ Yes, we use Amigas. #
- #--- jtv@xs4all.nl ---\"Oh, same as always."/-- ... --#
- #jvermeul@wi.leidenuniv.nl \ "That bad, huh?" / Got a problem with that? #
- We have enough politicians to destroy the world 5 times over--shouldn't once be enough?
-