| Running 64bit applicatons |
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alegator
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O.P.  Running 64bit applicatons
Say I have a 64bit program. In order to run it at full 64bit, will it be the case if installed in a 32bit OS with a 64bit CPU? Or It needs BOTH a 64bit OS and CPU? I'm confused...
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| 11-21-2006 11:40 AM |
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user27089
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RE: Running 64bit applicatons
I can't find any information about this on wikipedia, but I'm pretty sure the 64-bit software is designed solely for use with 64-bit operating systems running on 64-bit processors.
This post was edited on 11-21-2006 at 12:34 PM by user27089.
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| 11-21-2006 12:34 PM |
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WDZ
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RE: Running 64bit applicatons
Did a bit of Googling and found this nice explanation...
http://www.velocityreviews.com/forums/t373376-pyt...5-winxp-amd64.html
quote:
The O.P. has a 64-bit Athlon processor, but is running a 32-bit OS. The processor emulates its 32-bit predecessor in "legacy mode", so 32-bit software runs.
Given a 64-bit processor, why can't 64-bit applications run under a 32-bit Operating System? Because the O.S. provides the environment in which the application runs. There are several problems: system calls could be probably be thunked by a library, but the virtual memory space is a deal breaker. A 32-bit O.S. deals with 32-bit addresses; it can't support the address space of a 64-bit app.
Running a 32-bit O.S., the processor stays in 32-bit legacy mode. Enabling the processor's 64-bit mode is a privileged operation; the application cannot do it.
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| 11-21-2006 04:03 PM |
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alegator
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| 11-21-2006 08:29 PM |
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user27089
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RE: Running 64bit applicatons
quote:
Originally posted by alegator
Mmm...I'm more confused now...there are 64 bit software that runs on 32 bit Os...take the new version of Mathematica as ana example:
http://www.wolfram.com/products/mathematica/newin52/64bit.html
That software has probably been coded so that it is compatible for both 32-bit and 64-bit operating systems. |
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| 11-21-2006 09:09 PM |
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Dan^
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RE: Running 64bit applicatons
In order to run a 64-bit application you need to have both a 64-bit processor and a 64-bit Operating System. If you have a 64-bit CPU, but not a 64-bit OS, then you can't run a 64-bit program. It will just crash.
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| 11-21-2006 10:18 PM |
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Jesus
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| 11-22-2006 12:23 AM |
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alegator
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O.P. RE: Running 64bit applicatons
Windows Vista will be 32bit, so what's so great about it? When do you think that Windows will release a 64bit OS along with all corresponding drivers?
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| 11-22-2006 12:30 AM |
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ShawnZ
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RE: Running 64bit applicatons
quote:
Originally posted by alegator
Windows Vista will be 32bit, so what's so great about it? When do you think that Windows will release a 64bit OS along with all corresponding drivers?
um... windows vista will be both, just like windows xp and 2003 :/ Spoiler: the game.
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| 11-22-2006 12:47 AM |
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alegator
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O.P. RE: Running 64bit applicatons
Yes, I just read it'll come in both 32 and 64bit versions. Problem is that most drivers today are written for 32bit.
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| 11-22-2006 01:24 AM |
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