Execution unit tells the bus interface unit from where to fetch instructions as well as gets the opcode of an instruction from an instruction queue.then the EU decodes it or executes it.BIU and EU operate independently.when the EU executing an ins Basic Concepts of Microprocessors • Differences between: - Microcomputer - a computer with a microprocessor as its CPU. Includes memory, I/O etc. - Microprocessor - silicon chip which includes ALU, register circuits & control circuits - Microcontroller - silicon chip which includes microprocessor, memory & I/O in a single package. Contents Preface to the FourthEdition vii Preface tothe FirstEdition ix 1. Microprocessor-APhysical System 1 2. TheMicroprocessorSystem 5 2.1 CentralProcessingUnit (CPU)5 2.2 Arithmetic-Logic Section 6 2.3 Accumulator6 2.4 Status Registers 7 2.5 ALU7 2.6 General PurposeRegisters8 2.7 ControlRegisters8 2.8 ProgramCounter(PC)8 2.9 StackPointer(SP)8 language programming, superscalar execution, pipelining, the programming model, and machine language. This section is essential reading for those who are new to the world of microprocessors.The middle section of the book consists of detailed studies of two popular desktop A pipeline is sort of like an assembly line for executing cpu instructions. Each stage of the pipeline does a small part of the execution then passes the instruction to the next stage. This allows a large number of instructions to be progressing through the cpu at the same time. One of the examples is 8086 processor. Processor pipelining refers to the processing of same data stream by a cascade of processors each of which processes a specific task. The data stream passes the first processor with results stored in a memory which is also accessible by the second processor. A Microprocessor is an Integrated Circuit with all the functions of a CPU however, it cannot be used stand alone since unlike a microcontroller it has no memory or peripherals.. 8086 does not have a RAM or ROM inside it. However, it has internal registers for storing intermediate and final results and interfaces with memory located outside it through the System Bus. This is achieved by a concept called pipelining. 1.4.1 Architecture of 8086 The 8086 ("eighty eighty-six") is a 16-bit microprocessor chip designed by Intel between early 1976 and mid-1978. The architecture is shown below. 1 a. Define a microprocessor. Explain the programming model of the 8086 through the CORE-2 microprocessor including the 64-bit extensions. [06 marks] Ans: The Microprocessor • The microprocessor(or CPU) is the controlling-element in a computer. • The microprocessor controls memory and I/O through buses. Best 8086 Microprocessor Objective Questions and Answers. Dear Readers, Welcome to 8086 Microprocessor Objective Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of 8086 Microprocessor MCQs.These objective type 8086 Microprocessor Questions are very important for campus placement test and job Microprocessor Evolution: 4004 to Pentium-4 Joel Emer Intel 8086 (1978, 8MHz, 29,000 transistors) Workstation and PC markets merge • By late '90s (except for Apple PowerPC-based systems) RISC vendors have tiny share of desktop market Instruction pipelining is a technique used in the design of modern microprocessors, microcontrollers and CPUs to