Article View: comp.os.msdos.programmer
Article #7258Re: 8088 vs 8086
From: Shaun Case
Date: Sat, 22 Jun 1991 23:45
Date: Sat, 22 Jun 1991 23:45
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In article <1991Jun21.173218.1912@mccc.edu> pjh@mccc.edu (Pete Holsberg) writes: (re: 8086 vs 8088) > >For all practical purposes, yes. I think that there's slightly >different instruction fetch queue, but neither a user nor a programmer >would be aware of it. Someone mentioned that they are different lengths -- what if you have some self modifying code that modifies something that is already in the queue? Do the 8086/8 catch this and re-fetch (or modify within the queue) the altered instructions? It is my understanding that running self-modifying code is a definite no-no on the 386 and 486, although I think this is due to pipelining rather than a fetch queue. Am I right or wrong? (Please, no style flames on SMC, I don't write it (any more...) :-> ) Shaun -- shaunc@gold.gvg.tek.com -- 100,000, perhaps 200,000 or more Iraqis died in a "Turkey Shoot" inappropriately called a "war." -- Michael Albert
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!zephyr.ens.tek.com!gvgpsa!gold.gvg.tek.com!shauncReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!zephyr.ens.tek.com!gvgpsa!gold.gvg.tek.com!shaunc From: shaunc@gold.gvg.tek.com (Shaun Case) Newsgroups: comp.os.msdos.programmer Subject: Re: 8088 vs 8086 Message-ID: <2601@gold.gvg.tek.com> Date: 22 Jun 91 23:45:57 GMT References: <1991Jun21.030948.10951@cs.mcgill.ca> <1991Jun21.173218.1912@mccc.edu> Organization: Grass Valley Group, Grass Valley, CA Lines: 30