In computing, Page Size Extension (PSE) refers to a feature of x86 processors that allows for pages larger than the traditional 4 KiB size. It was introduced in the original Pentium processor, but it was only publicly documented by Intel with the release of the Pentium Pro. The CPUID instruction can be used to identify the availability of PSE on x86 CPUs.
Read more about Page Size Extension: Motivation, Operation
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