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CODING SYSTEMS

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CODING SYSTEMS

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  1. CODING SYSTEMS CODING SYSTEMS

  2. CODING SYSTEMS CHARACTERS • digits: 0 – 9 (numeric characters) • letters: alphabetic characters • punctuation marks: special characters

  3. CODING SYSTEMS CODES • ASCII: American Standard Code for Information Interchange – commonest code – used to send information to and from microcomputers • Originally used a 7-bit code • An eight bit was added, this allowed an extra 128 characters to be represented • Nowadays ASCII is an 8-bit code

  4. CODING SYSTEMS EBCDIC • Extended Binary Coded Decimal Interchange • an 8-bit code • this code allowed for international characters

  5. characters D – P – 3 in both EBCDIC and ASCII CODING SYSTEMS Differences between ASCII and EBDIC