Linked by Thom Holwerda on Wed 5th Jan 2011 22:09 UTC
Windows And this is part two of the story: Microsoft has just confirmed the next version of Windows NT (referring to it as NT for clarity's sake) will be available for ARM - or more specifically, SoCs from NVIDIA, Qualcomm, and Texas Instruments. Also announced today at CES is Microsoft Office for ARM. Both Windows NT and Microsoft Office were shown running on ARM during a press conference for the fact at CES in Las Vegas.
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RE[3]: enough bits?
by phoenix on Thu 6th Jan 2011 23:39 UTC in reply to "RE[2]: enough bits?"
phoenix
Member since:
2005-07-11

Also important note the 4GB limit on 32 bit OS on a lot of x86 chips is garbage as well. PAE mode. 64gb to 128gb. 32 bit mode.

So 32 bit being limited to 4GB is mostly a market bending nothing more by Microsoft.


PAE allows the *kernel* to access more than 4 GB of RAM. However, *processes* can only see 4 GB of RAM, period. Each process can be given it's own 4 GB chunk of memory, though. But they are still limited to 4 GB.

And the kernel has to do a lot of thunking and bounce buffers and hoop jumping and whatnot to manage PAE accesses. And all your drivers need to be coded to support PAE. And all your low-level apps need to be coded to support PAE. And on and on.

PAE is a mess, and should be avoided like the plague unless there's absolutely no way to run a 64-bit OS/apps.

The only way for an app/process to access more than 4 GB of RAM (on x86) is to use a 64-bit CPU with a 64-bit kernel.

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