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From: Roedy Green <roedy@mindprod.com>
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 comp.lang.ada,comp.lang.java.programmer,comp.lang.pl1,comp.lang.vrml,comp.lang.java.advocacy
Subject: Re: Market pressures for more reliable software
Organization: Canadian Mind Products
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Date: Wed, 27 Jun 2001 21:09:10 GMT
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On Wed, 27 Jun 2001 09:41:58 GMT, "Gary Labowitz" <garyl@enter.net>
wrote or quoted :

>I'm curious what you mean by "relocation" that you were shocked that S/360
>didn't have it.

The univac 1100, the IBM 360s predecessor, had a relocation register
so you could load a ram image and start executing without having to
make any adjustments.  

The 360 used absolute addresses. To load you had to adjust all the
address references to account for where in RAM the program was loaded.
This greatly slowed down the process of getting a program started.

Exploiting relocation hardware to speed loading is still not fully
exploited even in Windows NT.


For more detail, please look up the key words mentioned in this post in
the Java Glossary at: http://mindprod.com/gloss.html 

--
Roedy Green, Canadian Mind Products
Custom computer programming since 1963. Ready to take on new work.