关于计算机硬件作文.docVIP

(1) Computer systems for use in electronic circuits and physical device, is almost tangible entities, such as the central processing unit (CPU), storage, an external device (input/output devices, I/O devices) and bus, etc. (1) the memory. The main function is to store programs and data, the program is the basis of computer operation, data is computer operation of object. Memory is by memory, address decoder, literacy control circuit, the address bus and the data bus composition. Can directly by the central processor instructions and data of random access memory says mainly memory, disk, tapes and CDS etc mass storage called external memory (or auxiliary storage). By the main memory, external memory and the corresponding software, composed of computer storage systems. (2) the central processors main function is to press exist within the memory program, headed to execution procedures specified by the operation. The central processor main component are: data registers, instruction register, instruction decoder, alus, operating controller, the program counter (instructions address counter), address register, etc. (3) an external device is a bridge between the user and the machine. The input device task was to user requirements of computer processing of data, characters, words, graphics and the procedure of various forms of converting information for the computer can accept coding form to inside a computer deposit. Output devices task was to computer processing results to the needs of user form (such as screen, text printing, graphic charts, language acoustics) output. Input/output interface is an external device with CPU between the buffering devices, responsible for electrical properties of matching and information format conversion. 计算机系统中所使用的电子线路和物理设备，是看得见、摸得着的实体，如中央处理器（ CPU ）、存储器、外部设备（输入输出设备、I／O设备）及总线等。 ①存储器。主要功能是存放程序和数据，程序是计算机操作的依据，数据是计算机操作的对象。存储器是由存储体、地址译码器 、读写控制电路、地址总线和数据总线组成。能由中央处理器直接随机存取指令和数据的存储器称为主存储器，磁盘、磁带、光盘等大容量存储器称为外存储器（或辅助存储器） 。由主存储器、外部存储器和相应的软件，组成计算机的存