Member
Join Date: Jun 2006
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I was watching the PowerMac G5 keynote on youtube, and noticed that it was first released in June 2003! That means, it must be using Jaguar, and since G5 is 64-bit, that means Jaguar must be 64-bit capable?
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A for effort.
Join Date: Nov 2004
Location: New Jersey
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Eh, not really. From how I understand it, it could run on a 64-bit processor, but not actually be using the capabilities of 64-bit computing.
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Selfish Heathen
Join Date: May 2004
Location: Zone of Pain
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That depends on how you define "capable".
In a nutshell:
The quality of this board depends on the quality of the posts. The only way to guarantee thoughtful, informative discussion is to write thoughtful, informative posts. AppleNova is not a real-time chat forum. You have time to compose messages and edit them before and after posting. |
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ಠ_ರೃ
Join Date: May 2004
Location: Minnesota
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Furthermore, I think it was only a late point release of 10.2 (10.2.7, and a separate G5 version at that) that added 64-bit compatibility.
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10.2.7 (G5-only) had a 64-bit version of Accelerate.framework, i.e. for AltiVec (math and vector processing). And 10.6 has a 64-bit kernel (alongside a 32-bit one), and therefore support for 64-bit kernel extensions. |
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Join Date: Jun 2006
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Member
Join Date: Jun 2006
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So in Leopard, there is only one Kernel, and it's 32-bit only?
I know for a fact that Leopard is capable of running X86_64 binary, since I've compiled one and run it. In Activity Monitor, it does show "Intel (64-bit)" instead of just "Intel". |
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Member
Join Date: Jun 2006
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So what is the benefit of having a 64-bit kernel? Or in other words, what are the limitations of running a 64-bit app in Leopard now? |
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Ninja Editor
Join Date: May 2004
Location: Bay Area, CA
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Member
Join Date: Jun 2006
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Okay that makes sense. So currently 10.3-10.5, each process can't access exceed 4GB RAM.
I read a blog from adobe engineer a while ago about why CS4 won't be 64-bit. He said Apple didn't port the Carbon to 64-bit, only Cocoa is ported to 64-bit, so they couldn't support 64-bit for the CS4. Now, if that is the case, even Carbon was ported to 64-bit, CS4 still shouldn't be able to access more than 64-bit, no? I'm confused... |
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Ninja Editor
Join Date: May 2004
Location: Bay Area, CA
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The 32-bit processes cannot, but 64-bit processes can. The kernel's bit-depth doesn't have to equal a process's bit-depth. (At least that's true on OS X 10.5, IDK about other versions or other OSs.)
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