operation code


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operation code

[‚äp·ə′rā·shən ‚kōd]
(computer science)
A field or portion of a digital computer instruction that indicates which action is to be performed by the computer. Also known as command code.

operation code

(programming)
(Or "op code") The part or parts of a machine language instruction which determines what kind of action the computer should take, e.g. add, jump, load, store. In any particular instruction set certain fixed bit positions within the instruction word contain the op code, others give parameters such as the addresses or registers involved. For example, in a 32-bit instruction the most significant eight bits might be the op code giving 256 possible operations.

For some instruction sets, certain values in the fixed bit positions may select a group of operations and the exact operation may depend on other bits within instruction word or subsequent words.

When programming in assembly language, the op code is represented by a readable name called an instruction mnemonic.

operation code

The part of a machine instruction that tells the computer what to do, such as input, add or branch. The operation code is the verb; the operands are the nouns.
References in periodicals archive ?
These are the white-collar jobs of today," saysAaAaAeAeAaAeAeA David Molina, founder and execu director of Operation Code.
In an operation code named Blue Monday, Whitehall officials and anti-terror experts met at the Foreign Office to work out ways of dealing with the threat of terror attacks.
After AXI and AOI, the PT100 Parallel Tester can perform boundary-scan structural tests on 25-30 PCBs simultaneously, then in parallel download CPU based functional test code to the CPU's FLASH memory, have each CPU execute on-board functional tests simultaneously, capture the results and then in parallel, erase the FLASH and download, the product's real operation code," added Clark.
The mass exodus from the bordering Waziristan agency, where military operation code named Rah-e-Nijat has entered the third week, have added to the sense of insecurity of the local people, who fear that terrorist may capitalize on the situation and sabotage the peace of the area.
Jacob, aged 37, of no fixed address, but previously of Pike Drive, Chelmsley Wood, was finally captured after a police operation code named Operation Unicycle.
Scotland Yard's Anti-Terrorist Branch and MI5 have been gathering intelligence on the group for months in an operation code named Crevis.

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