What is effective address and physical address?

Physical Address will have to be calculated Physical Address : Actual address of a byte in memory. Here, the effective address of the memory location at which the data operand is stored is given in the instruction. The effective address is just a 16-bit number written directly in the instruction.

What do you mean by effective address and physical address of 8086?

Effective Address or Offset Address: It is an unassigned 16 bit number that expresses the operand’s distance in bytes from the beginning of the segment in which it resides. In 8086 we have base registers and index registers. The displacement is an 8 or 16 bit number that is contained in the instruction.

What is meant by effective address in microprocessor?

The effective address is the location of an operand of the instruction, since the operand is the data to be accessed. Immediate instructions use their operand to hold the data needed to complete the instruction.

What is the difference between segment address and offset address and physical address *?

Offset is the displacement of the memory location from the starting location of the segment. The 8086 addresses a segmented memory. The complete physical address which is 20-bits long is generated using segment and offset registers each of the size 16-bit.

What is meant by effective address?

An effective address is any operand to an instruction which references memory. Effective addresses, in NASM, have a very simple syntax: they consist of an expression evaluating to the desired address, enclosed in square brackets.

What means physical address?

A Physical Address is a real street address that you can use for business or personal use. Because Physical Addresses are real street addresses, not a PO Box, you can register your business and receive packages from any carrier, including FedEx and UPS.

What is the need of segmentation in 8086?

It allows to processes to easily share data. It allows to extend the address ability of the processor, i.e. segmentation allows the use of 16 bit registers to give an addressing capability of 1 Megabytes. Without segmentation, it would require 20 bit registers.

Where is physical address in 8086 microprocessor?

I learnt that the physical address is calculated by shifting the segment address (16-bit) left 4 times and adding it with the 16-bit offset address. The memory in the 8086 architecture is 1M.

What are the differences between a port address a logical address and a physical address?

The logical address defines the sender and receiver at the network layer and is used to deliver messages across multiple networks. The port address (service-point) identifies the application process on the station.”