I think there's a little bit more to it than that, as you need some way to guarantee that application's memory is not grabbed by some other process (including OS) - and if you completely ignore the OS's memory management, as you seem to want to do, then you need some way to protect your app's memory from being ripped off by other running apps, which suggests to me you need to write a completely separate memory manager that the OS will use at a very low level.  Good luck with that.

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