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COE 308 - Standard ASCII - ⇒ used to terminate a string...

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Character setsStandard ASCII: 7-bit character codes (0 – 127) Extended ASCII: 8-bit character codes (0 – 255)Unicode: 16-bit character codes (0 – 65,535)Unicode standard represents a universal character set Defines codes for characters used in all major languages Used in Windows-XP: each character is encoded as 16 bits UTF-8: variable-length encoding used in HTML Encodes all Unicode charactersUses 1 byte for ASCII, but multiple bytes for other characters Null-terminated String Array of characters followed by a NULL character The first 32 characters of ASCII table are used for control Control character codes = 00 to 1F (hexadecimal) Not shown in previous slide Examples of Control Characters Character 0 is the NULL character
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Unformatted text preview: ⇒ used to terminate a string Character 9 is the Horizontal Tab (HT) characterCharacter 0A (hex) = 10 (decimal) is the Line Feed (LF)Character 0D (hex) = 13 (decimal) is the Carriage Return (CR) The LF and CR characters are used together They advance the cursor to the beginning of next line One control character appears at end of ASCII table Character 7F (hex) is the Delete (DEL) character Critical Interface between hardware and software ?An ISA includes the following . .. ? Instructions and Instruction Formats ? Data Types, Encodings, and Representations ? Programmable Storage: Registers and Memory ? Addressing Modes: to address Instructions and Data ? Handling Exceptional Conditions (like division by zero)...
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