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SEGMENTATION HARDWARE
An execution to map two-dimensional user-defined addresses into one-dimensional physical addresses. This mapping is affected by means of segment table. Every entry in the segment table has a segment limit and a segment base. The segment base contains the starting address wherever the segment resides in memory, while the segment limit specifies the length of the segment.
A logical address concise of two parts: an offset and a segment number,s into that segment, d The segment number is utilized as an index to the table. The offset d of the logical address ought to be between 0 and the segment limit. The segment table is basically an array of base-limit register pairs.
Evicting the most-recently used (MRU) page does very well on LRU's worst case. In general, however, MRU is a bad idea, since many programs exhibit temporal locality in their memory
Memory Protection
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summary of what operating system do
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