tailieunhanh - Tài liệu một số câu hỏi dành cho máy tính

A computer may be defined as a machine which accepts data from an input device, processes it by performing arithmetical and logic operations in accordance with a program of instructions and returns the results through an output unit. | Tài liệu một số câu hỏi dành cho máy tính 1 Computer system Computer System Book I: computer system fundamentals. Chapter 1: INTRODUCTION TO COMPUTER. Question 1. What is a computer? A computer may be defined as a machine which accepts data from an input device, processes it by performing arithmetical and logic operations in accordance with a program of instructions and returns the results through an output unit. A computer is basically an electronic machine operating on current. Question 2. Components of a Computer system? A computer system comprises of the following components: 1. Central Processing Unit (CPU). - CPU is the heart of the whole sys - CPU consists of the : • control unit (CU) • arithmetic logic unit (ALU) • accumulator (ACC) • program counter (PC) • instruction register (IR) • memory address register (MAR) • memory data register (MDR) • status register (SR) • general purpose register - The function of each components of CPU: • Control unit: control and coordinate all hardware functions of the CS. examine and decode all program instructions to the computer and initiate their execution by sending the appropriate signals. • ALU: performs all arithmetic and logic comparision two values functions required by computer. • ACC: 2 hol the first operand of the tem porary ds resu lt of the ALU . • PC : conta i s the add of the next i n nstru ction to be excuted . • I : R conta i s the curren t i n nstru ction to be executed . M ai n m em ory •M AR: hol the address l ds ocati to or from w hi on ch data i to be transfe rred s • M DR: conta i s the data to be w ri n tten to or read out of the addressed l ocati .on • SR : keeps track of the status of the accum al .