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Making physical memory unusable

Hi there!
Is there a way to make the physical memory unusable for the OS by means of using the page directory?
If not, then what can restrict the OS and software it contains from certain areas of the physical memory in a dynamic way? Using the E820 BIOS table to mark DEVICE_MEMORY is one way, but it's not dynamical...
Thanks in advance!
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Honored Contributor III

I imagine that your purpose is for testing. You might check out or They might have a utility that does this. One method would be to install a RAMDISK driver that uses the non-Paged Pool. You don't use the RAMDISK since your interest is testing under various memory configuration conditions without jerking chips from your motherboard.

Jim Dempsey

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