Hello

I wrote a few hour ago:

I found the description about PSE-36, it's part of the addendum to Volume 3 of the PII documentation.
(available from http://www.intel.com/design/pentiumii/manuals/)
In summary:
On PII Xeon processors, you can use 4 MB PTE's to map physical memory from the complete 36 bit address space. They use the formerly reserved bits in the middle of the PTE for this. Everything else remains unchanged. Actually, PSE-36 is always enabled on PII Xeon processors if you enable the 4 MB page table entries.
The modification only applies to 4 MB pte's, PSE-36 does not allow you to access high memory with 4 kb PTE's

Please ignore my post about Intel's NT device driver:
It's a simple hack, it allows you to use the remaining memory as a ramdisk.

Regards,
Manfred

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