order code
Noun: 1. A specific sequence of symbols, characters, or instructions that defines a particular operation or command to be executed by a computer. This is the fundamental meaning, referring to the coded instruction itself. 2. The part of a program or set of operation descriptions that specifies the action to be performed. This meaning emphasizes the role of the code within a larger system of operations.
- The is interpreted by the computer's central processing unit (CPU).
- Programmers write instructions that are translated into machine-readable .
- Each unique corresponds to a specific task, such as adding two numbers or moving data.
- Noun:
- The assembly language instruction
ADDis translated into a binaryorder codethat the processor understands. - A single
order codecan tell the computer to fetch data from memory. - The complexity of a processor's
order codeset determines the types of operations it can perform directly.
- Instruction Set Architecture (ISA): The complete collection of for a particular computer defines its Instruction Set Architecture. This is the interface between software and hardware.
- Processors from different manufacturers often have different ISAs, meaning their
order codesare not compatible.
- Opcode (Operation Code): A more common technical synonym for . It is the portion of a machine language instruction that specifies the operation to be performed.
- Machine Code / Machine Language: The lowest-level programming language consisting of binary or hexadecimal that a computer's CPU executes directly.
- Instruction: A broader term for a single command in a computer program, which is implemented using an .
- Opcode
- Operation code
- Instruction code
The term order code is largely synonymous with opcode. It is a technical term from computer architecture and low-level programming. In modern usage, opcode is more frequently used. The term emphasizes that it is the part of the instruction that "orders" the processor to perform a specific action (e.g., add, subtract, jump) as opposed to the data or memory addresses the action uses.
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the portion of a set of operation descriptions that specifies the operation to be performed; the set of operations in a computer
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