Segment descriptor

In memory addressing for Intel x86 computer architectures, segment descriptors are a part of the segmentation unit, used for translating a logical address to a linear address. Segment descriptors describe the memory segment referred to in the logical address.^[1] The segment descriptor (8 bytes long in 80286) contains the following fields:^[2]

1. A segment base address
2. The segment limit which specifies the segment limit
3. Access rights byte containing the protection mechanism information
4. Control bits

References

1. ^ Bovet, D.P., & Cesati, M. (2000). Understanding the Linux Kernel (First Edition). O'Reilly & Associates, Inc.
2. ^ Tabak, Daniel. Advanced Microprocessors. Mcgraw Hill Publishers. p. 149. {{cite book}}: Check |url= value (help)

• Tabak, Daniel. Advanced Microprocessors. McGraw Hill and Co.
• Hall, Douglas. Microprocessors and Interfacing. McGraw Hill Publications.

See also

• memory segment
• segmentation
• memory address

Further reading

• Robert R. Collins (August 1998). "The Segment Descriptor Cache". Dr Dobb's Journal.

External Links

• Intel 80386 Reference Programmer's Manual - Segment Translation

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