home *** CD-ROM | disk | FTP | other *** search
- Path: comma.rhein.de!serpens!not-for-mail
- From: mlelstv@serpens.rhein.de (Michael van Elst)
- Newsgroups: comp.sys.amiga.misc
- Subject: Re: OS features
- Date: 4 Jan 1996 08:39:26 +0100
- Organization: dis-
- Message-ID: <4cg07e$pfc@serpens.rhein.de>
- References: <49tus6$os0@news.missouri.edu> <92747544038@PAPA.NORTH.DE> <4b3h9s$1st@alterdial.UU.NET> <2152.6561T63T2136@cycor.ca> <4b7i18$si1@vixen.cso.uiuc.edu> <2361.6563T633T582@cycor.ca> <4bcf3r$5gd@serpens.rhein.de> <1074.6565T1223T2767@cycor.ca> <4bkubh$2t6@serpens.rhein.de> <4bp8hu$d37@usenet.rpi.edu> <4c6rpr$q6g@news.jhu.edu> <ludde.820464192@nada.kth.se> <4cbkp4$lqh@usenet.rpi.edu> <4cf89k$gfk@ArtWorks.apana.org.au>
- NNTP-Posting-Host: serpens.rhein.de
-
- james@Snark.apana.org.au (James Burton) writes:
-
- >same fabrication as the processor. There was a recent discussion on another
- >newsgroup about different techniques for getting 68000 CPUs to restart
- >instructions after a page fault was serviced. Let's not say that it's
- >impossible, just awkward.
-
- Well, it _is_ impossible. You either have to freeze the processor in
- a bus error condition and use a second processor to handle the VM
- (which is really slow since you can't execute another task in the
- meantime), or you must avoid certain instruction sequences if they
- can cause a page fault (like adding a safe test instruction that
- fails before you try to access the page with the unsafe sequence).
-
- Regards,
- --
- Michael van Elst
-
- Internet: mlelstv@serpens.rhein.de
- "A potential Snark may lurk in every tree."
-