Segments

SEGMENTATION
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SEGMENTATION

The virtual memory discussed so far is one-dimensional because the virtual addresses go from 0 to some maximum address, one address after another. For various problems, having two or more separate virtual address spaces may be much better than having only one. For

Segmentation with Paging: MULTICS
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Segmentation with Paging: MULTICS

If the segments are large, it may be inconvenient, or even impossible, to keep them in main memory in their entirety. This leads to the idea of paging them, so that only those pages that are really required have to be around. Many significant systems have supported paged

Segmentation with Paging: The Intel Pentium
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Segmentation with Paging: The Intel Pentium

In many ways, the virtual memory on the Pentium resembles that of MULTICS, including the presence of both segmentation and paging. Whereas MULTICS has 256K independent segments, each up to 64K 36-bit words, the Pentium has 16K independent segments, each holding

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