Q2/ list three main tasks of microprocessor
Instructions and Operation
Nowadays, electrical engineers are required to evolve their practices by incorporating embedded processes, microcontrollers, digital signal processors, and so on. These processors are beneficial in many ways and have changed the perspective of electronic design.
Subroutine Instruction
Subroutine instruction is defined as the instructions used in the programming language in a sequence form saved in memory. They are used to doing a specific task. Subroutine instruction is called a unit that instructs to perform some needed task. There are many programming languages in which subroutine instructions are used but have a different identity or name, such as method, function, subprogram, routine, etc. Subroutine or sub-program is designed or coded as they can be called multiple times while executing the program.
Classification of Buses
A bus inside a microprocessor is a collection of wirelines that contain related information. A group of wires required for communication among the microprocessor and peripherals is known as a system bus. A bus is an electrical or digital passage across which bits are transferred between a variety of computer elements. It mainly links all the internal parts to the CPU (Central Processing Unit) and main memory. The width or size of any bus is crucial since it affects the amount of data that is transferred at a certain time period. Buses always transmit data parallelly, in a 32-bit bus, the information is supplied over 32 wirelines simultaneously and each bus comprises a clock speed measurable in MHz. The various types of buses inside a microprocessor are address bus, data bus, and control bus.
Execution of Instruction
A sequence of instructions makes up a program stored in a computer's memory unit. The CPU executes these instructions by going through a cycle for each instruction. The instruction cycle in a simple computer includes the steps listed below:
![HOMEWORK-5
-If (IP)=1200 H, (SS)=6000H and
21. Physical address is
(BP)=74FE H.
Q2/ list three main tasks of microprocessor
Q3/ list buses in a microcomputer system and draw The block diagram of
computer system showing the buses structure.
Q4/ list four functions of BIU.
Q5/ illustrate by block diagram the software architecture of the 8086
microprocessors.
Q6/ Illustrate by chart Addressing Modes in 8086
Q7/ What is the result of executing the following instruction sequence?
MOV AX, EDH
MOV SS, AX
MOV SP, 7500H
MOV BX, 1000H
PUSH BX
POP BX
Q8/ What is the result of executing the following instruction sequence?
MOV AX, 0AH
MOV BX, 100
MOV CX,3579H
MOV DS, 2200H
XCHG AL, BL
MOV CL, BL
INC CL
XCHG [BX][DI], CX
XLAT
HLT
Dr. Zahra'a M. Baqir
MICROPROCESSORS](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcb92599f-6499-449f-8368-029052772640%2Fafe94069-50bf-4418-9fff-37e4d74678f7%2Fo9xggp_processed.jpeg&w=3840&q=75)
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