Comp codes (ascii...).24to25
- 1. Computer codes ASCII Codes, EBCDIC Codes http://improvec.blogspot.in/ 1
- 2. Objective On completion of this period, you would be able to know ASCII Codes EBCDIC Codes http://improvec.blogspot.in/ 2
- 3. Recap Conversion of binary number to hexa decimal Conversion of hexa decimal number to binary http://improvec.blogspot.in/ 3
- 4. Prerequisite ASCII Codes EBCDIC Codes http://improvec.blogspot.in/ 4
- 5. COMPUTER CODES http://improvec.blogspot.in/ 5
- 6. Why codes are used? • Codes are used to represent the letters and special characters (such as +,-,*,$,&) in terms of 0’s and 1’s http://improvec.blogspot.in/ 6
- 7. Character Sets BCD - Binary Coded Decimal ASCII - American Standard Code for Information Interchange EBCDIC - Extended Binary Coded Decimal Interchange Code http://improvec.blogspot.in/ 7
- 8. BCD CODE http://improvec.blogspot.in/ 8
- 9. BCD (Binary Coded Decimal) BCD code is the simplest code to represent decimal numbers In BCD code a decimal number is represented by four binary bits For example, 3 is represented as 0011 http://improvec.blogspot.in/ 9
- 10. BCD Code (Binary Coded Decimal) contd If a decimal number consists of two or more than two digits, each digit is individually represented by its four bit binary equivalent For example, 56 is represented by 0101 0110 http://improvec.blogspot.in/ 10
- 11. Standard BCD codes Decimal number Standard BCD codes 0 0000 1 0001 2 0010 3 0011 4 0100 5 0101 6 0110 7 0111 8 1000 9 1001 10 00010000 11 00010001 12 00010010 13 00010011 56 01010110 http://improvec.blogspot.in/ 11
- 12. ASCII CODE http://improvec.blogspot.in/ 12
- 13. ASCII ASCII is pronounced as “ask-ee” It stands for American Standard Code for Information Interchange It is widely used in micro computers http://improvec.blogspot.in/ 13
- 14. ASCII (contd) Micro computers using 8-bit word length use 7-bit to represent the basic code The 8th bit is used for parity or it may be permanently 0 or 1 http://improvec.blogspot.in/ 14
- 15. ASCII CODE (contd) : In this code a character is represented by two parts They are a zone portion and numeric portion Each digit has 0101 as the zone portion and its binary representation as the numeric portion Alphabetical characters are divided into two groups having 1010 or 1011 as the zone portion http://improvec.blogspot.in/ 15
- 16. ASCII Codes for characters Alphabetic ASCII-8 HEX Numeric ASCII-8 HEX A 10100011 A1 0 01010000 50 B 10100010 A2 1 01010001 51 C 10100011 A3 2 01010010 52 D 10100100 A4 3 01010011 53 E 10100101 A5 4 01010100 54 F 10100110 A6 5 01010101 55 G 10100111 A7 6 01010110 56 H 10101000 A8 7 01010111 57 I 10101001 A9 8 01011000 58 J 10101010 AA 9 01011001 59 K 10101011 AB L 10101100 AC M 10101101 AD N 10101110 AE O 10101111 AF P 10100000 B0 Q 10110001 B1 http://improvec.blogspot.in/ 16