CSCE 110 Lecture Notes - Lecture 2: Central Processing Unit, Auxiliary Memory, Instruction Register
8 Jan 2018
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Document Summary
Chapter 1: an overview of computers and programming languages. Categories of computers: mainframe computers, midsize computers, micro computers (personal computers) Cpu (central processing unit: cu (control unit): Controls flow of information in and out of main memory. Controls operation of internal cpu components: pc (program counter): points to next instruction to be executed. Ir (instruction register): holds instruction currently being executed: alu (arithmetic logic unit): carries out all arithmetic and logical operations. Secondary storage: secondary storage: device that stores information permanently, examples of secondary storage: Input devices feed data and programs into computers. Secondary storage: output devices display results. Software: software: programs that do specific tasks, system programs take control of the computer, such as an operating system, application programs perform a specific task. The language of a computer: digital signals are sequences of 0s and 1s, machine language: language of a computer, binary digit (bit): The digit 0 or 1: binary code: A sequence of 0s and 1s: byte:
