Showing posts with label segment registers. Show all posts
Showing posts with label segment registers. Show all posts

Describe the Internal Architectures, Features, Working Principles and Registers of 8086 Microprocessor.

Internal Architecture of Intel 8086 Microprocessor

The Intel 8086, also called the iAPX 86, is a 16-bit microprocessor designed by Intel Corporation in between 1976-1978. This Intel 8086 microprocessor gave rise to the x86 architecture or 16-bit architecture. The figure given below is the internal architecture of Intel 8086 microprocessor


What are the Purposes of Segment Registers in Intel 8086 Mircoprocessor

Purposed of Segment Registers:

 

CS (Code Segment) :

Code segment (CS) is a 16-bit register containing address of 64 KB segment with processor instructions. The processor uses CS segment for all accesses to instructions referenced by instruction pointer (IP) register. CS register cannot be changed directly. The CS register is automatically updated during far jump, far call and far return instructions.