Internal Data Representation: Numeric Systems, Character Coding, and Memory Storage, Slides of Fundamentals of E-Commerce

Download Internal Data Representation: Numeric Systems, Character Coding, and Memory Storage and more Slides Fundamentals of E-Commerce in PDF only on Docsity! 6 SYSTEM UNIT CHAPTER Docsity.com Announcement: Major Exam 01 Docsity.com Internal Data Representation Numeric representation & calculation Decimal Vs Binary number systems Conversions (Decimal to Binary and vice versa) Why binary in computers? Easy to represent using voltage levels Easy to implement binary operations using transistors (adder/divider circuits etc.) Binary Addition Examples Definitions Bit Byte Docsity.com …..Internal Data Representation How to do binary – decimal conversions? Decimal to Binary Needed when something goes in (from keyboard etc.) Conversion Example: 10 in decimal is 1010 in binary. (Divide 10 repeatedly by 2 and note down the remainders in reverse order) Binary to Decimal Needed when something comes out (to Screen etc.) Conversion Example: 1010 in binary is 10 in decimal. Multiply each digit with its corresponding power of 2. Add all products at the end. Docsity.com …..Internal Data Representation How to represent characters? Coding Schemes Binary coding schemes ASCII – 8 bit code EBCDIC -8 bit code Unicode – 16 bit code Coding ranges 8 bit – 256 codes 16 bit – 65536 codes Docsity.com System Board Allows I/O devices to communicate with the system unit. Docsity.com System Board The board which makes possible the inter connection of all computer components. Every system unit component has a direct connection with this board. Provides wires (data path) in between components. Docsity.com The Microprocessor chip The brains of the whole system Composed of Control Unit Arithmetic Logic Unit (ALU) Control Unit sends control signals to the rest of the devices like Memory – reading/writing for instructions/data/results Arithmetic Logic Unit Other external devices – for input/output etc. Docsity.com