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Re: st: Macs and 64-bit Memory Addressing

From   [email protected]
To   [email protected]
Subject   Re: st: Macs and 64-bit Memory Addressing
Date   Fri, 31 Oct 2003 11:19:01 -0600

Jeremy Fox <[email protected]> wrote:

> Mac OS X is currently a 32-bit OS no matter which processor it is 
> running on. This has been hashed out on various forums. See the 
> archives of Apple's scitech mailing list, or any of several OSNews 
> articles on the subject. I will not reply to anyone who wants to argue 
> the point here. I have a dual G5 running Panther.

No argument here.  However, there was speculation that OS X would receive
minimal 64-bit support (64-bit address space) upon the release of Panther and
that complete 64-bit support (file systems, etc.) would not happen until much
later.  I've seen no evidence this has happened but from Apple's website

Power Mac G5

"Use XCode to develop next-generation 64-bit applications. Use a Power Mac G5
to compile 64-bit applications faster. XCode features gcc 3.3, and distributed
builds over Rendezvous."

So what do they mean by "64-bit application"?  The documentation I've seen for
gcc 3.3 adds G5 optimization and some wide data type (forgot what kind) but no
mention of 64-bit addressing.  If this is what they mean by a 64-bit
application, then it's very misleading.  I know OS X is a 32-bit OS so
Apple's definition of a 64-bit application seems to be different from my
definition of a 64-bit application.  If their definition is the same, then
there is some minimal support in OS X and that's what I was trying to find
documentation on.

-Chinh Nguyen
 [email protected]

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