Noun
(plural opcodes)
- (computing) A mnemonic used to refer to a microprocessor instruction in assembly language.
Anagrams
opcode
English Wiktionary. Available under CC-BY-SA license.
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"Opcode." YourDictionary. LoveToKnow. www.yourdictionary.com/Opcode.
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Opcode. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/Opcode
opcode - Computer Definition
Short for Operation Code, which is the part of an instruction in machine language to specify the operation to be performed. A complete machine language instruction consists of an opcode and zero or more operands with which the specified operation is performed. Examples are “add memory location A to memory location B,” or “store the number five in memory location C.” “Add” and “Store” are the opcodes in these examples. Because virus scanners try to detect and remove malicious patterns of machine instructions, virus writers have now turned to metamorphic viruses that rewrite themselves using equivalent opcodes, or that re-order the machine instructions to achieve the same computational result while at the same time avoiding detection.
See Also: Virus.
Webster's New World Hacker Dictionary Copyright © 2010 by Bernadette Schell and Clemens Martin.
Published by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.
Published by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.
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Cite this page
MLA Style
"Opcode." YourDictionary. LoveToKnow. www.yourdictionary.com/Opcode.
APA Style
Opcode. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/Opcode
See operation code.
Computer Desktop Encyclopedia THIS DEFINITION IS FOR PERSONAL USE ONLY All other reproduction is strictly prohibited without permission from the publisher. © 1981-2017 The Computer Language Company Inc. All rights reserved.
Link to this page
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MLA Style
"Opcode." YourDictionary. LoveToKnow. www.yourdictionary.com/Opcode.
APA Style
Opcode. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/Opcode
