Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!cbmvax!jesup
From: jesup@cbmvax.commodore.com (Randell Jesup)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Self modifying code
Message-ID: <22024@cbmvax.commodore.com>
Date: 30 May 91 00:41:38 GMT
References: <5005@orbit.cts.com> <1991May28.120630.10150@cs.umu.se> <1991May29.134419.4980@odin.diku.dk>
Reply-To: jesup@cbmvax.commodore.com (Randell Jesup)
Organization: Commodore, West Chester, PA
Lines: 16

In article <1991May29.134419.4980@odin.diku.dk> bombadil@diku.dk (Kristian Nielsen) writes:
>  Yes, this is the problem - I believe on the '040 its even worse, since a
>write might only go to the (data) cache and not be written to memory until
>later.

	Most certainly.  For example, even if you were lucky on a 68030/68020
and the memory you wrote the code into wasn't in the cache, on an '040 in
copyback made (which is a BIG win) the code you wrote will be sitting in the
data cache but not in ram.  When you try to execute them it fetches from
memory.  Poof.

-- 
Randell Jesup, Jack-of-quite-a-few-trades, Commodore Engineering.
{uunet|rutgers}!cbmvax!jesup, jesup@cbmvax.cbm.commodore.com  BIX: rjesup  
Disclaimer: Nothing I say is anything other than my personal opinion.
"No matter where you go, there you are."  - Buckaroo Banzai