Memory Segmentation

[Gulshan Singh]

I'm confused about one thing concerning memory segmentation. I know that there are only a few segments, such as the code segment, data segment, etc. However, when you access memory using a 16 bit segment selector. This means that there are 2^16 values the segment selector could be... If there are only a few segments, how can you have that many values for the segment selector?

 

[iPat]

Segmentffset

It looks like there would be too many, but not really. The thing is that the segments *overlap*. So any given memory location can be addressed in several different ways.