Question

Explain physical memory organization in 8086 microprocessor

Answer 1

Segmentation is a process where main memory of computer is divided into various segments and every segment has its own base address. Its used to enhance speed of execution of computer system so that processor is able to execute data from memory easily and fast.

Need for Segmentation –

Bus Interface Unit (BIU) contains 4 16-bit special purpose registers called as Segment Registers.

Code segment register (CS) is used for addressing memory location in code segment of memory where executable program is stored.

Data segment register (DS) points to the data segment of the memory where the data is stored.