machine instruction

(redirected from machine instructions)

machine instruction

[mə′shēn in‚strək·shən]
(computer science)
A set of digits, binary bits, or characters that a computer can recognize and act upon, and that, when interpreted or decoded, indicates the action to be performed and which operand is to be involved in the action.

machine instruction

An instruction in machine language. Its anatomy is an operation code (op code) followed by one or more operand nouns. The op code is the action, while the operands are the data locations in memory to be acted upon or the program location in memory to switch to. There are instructions to INPUT and OUTPUT data, to process data by CALCULATING, COMPARING and COPYING and to go to some other part of the program. There are also instructions that manipulate the CPU's registers, as well as to go to some other part of the program based on the results of the last COMPARE operation (high, low, equal).

The following examples are conceptual and represent what a machine instruction would do. They are not actual instructions. See machine language, hardware platform and computer.

OP CODE        OPERANDS(verb)         (the nouns)

 add            amount to total

 compare        search-key to item-1

 if last compare
  was equal,
  go to         routine-A

 copy           from - to

 go to          routine-X
References in periodicals archive ?
Tools to develop accurate machine instructions with less human interface
Messages on ID and boarding passes, federal regulations regarding liquids, garment removal and x-ray machine instructions are delivered 24/7 in both English and Spanish.
With Kenmore Connect(TM), customers questioning whether their appliances are running exactly right or needing machine instructions find answers with a phone call and a push of a button.
The RealView Profiler provides its information for both the executed machine instructions and the original source code.
The service, based at Huddersfield Library, can re-format anything from washing machine instructions to timetables and holiday brochures and can also provide tactile images from room layouts, graphs and diagrams.
Lindows is an operating system that looks like Windows and works like Windows but chases its machine instructions around its circuitry using Linux rules.
In fact, you don't have to think about any washing machine instructions at all.
He did it with washing machine instructions, or something.
In theory, an integrated CAD/CAM system should allow an engineer to design a part on the computer using a design package and then transfer the design to an NC programming package which would automatically generate machine instructions.
Whereas most computer languages require huge numbers of machine instructions, Ray sought to create a much smaller instruction set to mimic the size of the human genetic code.
Messages on ID and boarding passes, federal regulations regarding liquids, garment removal and x-ray machine instructions are delivered 24/7 in both English and Spanish, providing passengers with consistent, surround sound audio accompanied by highly visual information to ensure passengers clearly understand all the information they need to know in order to improve efficiency, passenger flow and their overall airport experience.
CAD drawings can then be transformed into machine instructions.