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Flat vs. segmented memory – it's recursive
Diverting trains of thought, wasting precious time My recent forays in x86 segmentation (1 2) made me notice a trend in the evolution of x86: the decline of fine-grained memory protection, both across the move to 64-bit and indeed before that in the fast system calling features. These both partially hobbled the sophisticated segmentation system, which had been a hallmark of the architecture since the 286.
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