MS say a lot of things..some of which are even true.
I'm sorry, but Microsoft, who writes the code for their popular operating system "Says a lot of things...some of which are even true."
Implying they don't know the flags the kernel uses and can use for hardware access and resource management, in the operating system they wrote........ interesting thoughts you have there, but they are wrong. Please don't thread crap, I fail to see the software or anything you have written or done other than writing incorrect posts here. Please stop.
https://msdn.microsoft.com/en-us/library/windows/hardware/ff542202(v=vs.85).aspx
"
increaseuserva Megabytes
Specifies the amount of memory, in megabytes, for user-mode virtual address space
.
On 32-bit editions of Windows, applications have 4 gigabyte (GB) of virtual address space available. The virtual address space is divided so that 2 GB is available to the application and the other 2 GB is available only to the system.
The 4-gigabyte tuning feature, enabled with the
increaseuserva option, allows you to increase the virtual address space that is available to the application up to 3 GB, which reduces the amount available to the system to between 1 and 2 GB. The
BCEdit /set increaseuserva Megabytes command can specify any value between 2048 (2 GB) and 3072 (3 GB) megabytes in decimal notation. Windows uses the remaining address space (4 GB minus the specified amount) as its kernel-mode address space.
See
4-Gigabyte Tuning (Windows) for additional information about this feature."
Merely using the /3GB switch on XP enables the system to manage the memory up to the 3GB boundary.
"
Windows Server 2003 and earlier: To enable 4GT, add the
/3GB switch to the Boot.ini file. The
/3GB switch is supported on the following systems:
- Windows Server 2003
- Windows XP Professional
In Windows Vista X86 and later you could specify how much to allocate to the user space, but by this point X64 had become native and or applications were large address aware, or could be set to large address aware by other programs.