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This article contains some numerical problems in calculating the instruction format for different instructions.In this article, we will learn how the instruction format is formed for instruction with the help of the layout? Submitted by Monika Sharma, on July 22, 2019 . Prerequisite: General Instruction format of an instruction in 8086 Microprocessor In microprocessor architecture, the addressing mode is part of the machine instruction that specifies the rules for the CPU while operating on the OPERAND part of the machine instruction. The addressing mode part of the machine instruction format allows to specify whether the OPERAND value is a direct data Or It is an indirect referencing. The J format is used for the Jump instruction, which jumps to an absolute address. Because instructions must be aligned to 32-bits, the low 3 bits of every valid address are always 0. Thus, we can jump to any one of 2 32-6+3 addresses; the currently-executing address is used to supply the missing 3 bits. Opcode. Microprocessor CPU O CPU 1 CPU 2 CPU 3 Instruction Type Zero-address instructions; Question: Assume there are four microprocessors with different instruction format. Each microprocessor requires the following amount of time execute each instruction as shown in Table. Instructions in a program have proper instruction format and sequencing which decides the flow of the program execution. There are several types of instructions in a computer program like: instruction performing arithmetic or the logic operation on the numbers. instruction that branches to other instruction in the program. A microprocessor is the controlling unit of a computer made up of a small chip capable of operations and communication purposes. This small chip is known as the CPU which is microprocessors. It consists of ALU, Control Unit, and registers. This works on the instruction set and the cycle of processing. They are classified as: Figure 9.1: Instruction formats for load and store instructions, In the first format the 32-bit instruction is divided into seven fields. The first field (reading from the left) holds the 2-bit value 11, while the fifth field (bit 13) holds the 1-bit value 0. These bits are the same for all load and store instructions that use two source registers. Instruction Format: The 8086 instruction sizes vary from one to six bytes. Depending on the type of coding, an instruction may have more than one Hexcode, (not unique as in 8085) The OP code field occupies 6-bits.It defines the operation to be carried out by the instruction. Register Direct bit (D) occupies one bit. Arithmetic Instructions, Instructions of this group perform addition, subtraction, multiplication, division, increment, decrement, comparison, ASCII and decimal adjustment etc. The following instructions come under this category: Logical Instructions, Instruction of this group perform logical AND, OR, XOR, NOT and TEST operations. The table shows the general format of 8086 instructions. The following paragraph gives the different instruction format with examples. 1. One Byte Instruction: These instructions in the category uses the implied addressing mode an