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use the /3gb switch in the boot.ini:<br />
<a href="http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx" rel="ugc nofollow">http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx</a>
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use the /3gb switch in the boot.ini:
http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx [http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx]

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How can I change the default memory allocation in windows XP Pro. so that more memory is available to applications and 1GB of memory is used for the operating system.
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How can I change the default memory allocation in windows XP Pro. so that more memory is available to applications and 1GB of memory is used for the operating system.

Change the default allocation of memory in Windows XP Professional, SP 2

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.

Microsoft Legacy OS

Microsoft Windows XP is the sixth release of the NT series of operating systems, and was the first to be marketed in a variety of editions: XP Home and XP Professional, designed for business and power users. The advanced features in XP Professional are generally disabled in Home Edition, but are there and can be activated. There were two 64-bit editions, an embedded edition and a tablet edition.