Article View: comp.arch
Article #2572Re: Self-modifying code
From: Hedley Rainnie
Date: Fri, 13 Oct 1989 22:08
Date: Fri, 13 Oct 1989 22:08
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Mention has been made of the Dec-10 and 20. These machines also had the
feature that the registers were part of the address space, a very rare
feature indeed these days, this allows one to code a string search algorithm
and have the code reside in addresses 0..17 (octal of course), and then to
jump into the registers via an XCT instruction, the pleasure of this is that
the code will run at register speeds. Nowadays the cache technology is such
that this kind of coding is no longer needed but a little nostalgia is a
good thing.
Hedley
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hedley@imagen.com
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!convex!texsun!newstop!sun!imagen!hedley From: hedley@imagen.UUCP (Hedley Rainnie) Newsgroups: comp.arch Subject: Re: Self-modifying code Keywords: KL10 Dec-10,20 Message-ID: <4534@imagen.UUCP> Date: 13 Oct 89 22:08:00 GMT Organization: Imagen Corp., Santa Clara CA Lines: 17