Attached Link: http://en.wikipedia.org/wiki/Physical_Address_Extension

> Quote - Just curious... how would XP be hacked to "see" more than 4GB of RAM

You can't.

Quote - ... given that addresses are 32 bits, both on the hardware address bus, and in software. My understanding was that 2 to the 32nd power was the DEFINITION of the 4 GB limit, not some arbitrary choice.

See attached link.