Customer Service Chat
Get quote & make Payment
what is the definition of instructiion set?, Basic Computer Science
For a processor to be able to process an instruction, it requires to be able to determine what the instruction is asking to be carried out. For this to take place, the CPU requires to know what actions it may be asked to perform, and have pre-determined methods accessible to carry out these actions. It is this idea which is the reasoning behind the ''instruction set''.
When a processor is executing a program, at that time the program is in a machine language. Programmers mainly never write their programs in this form. While it may not have been at first written in this way, it is converted to a machine language at some point previous to execution so that it is comprehensible by the CPU. Machine language can be unswervingly interpreted by the hardware itself, and is able to be without difficulty encoded as a string of binary bits and sent simply via electrical signals.
The instruction set is a set of pre-defined machine codes, which the CPU is designed to expect and be able to operate upon when detected. Dissimilar processors have dissimilar instruction sets, to allow for easier coding, greater aspects and to cope with changes in the genuine architecture of the processor itself. Each machine code of an instruction set consists of two separate fields:
• Opcode and operands
The opcode is a short code which points to what operation is expected to be performed. Each and every operation has a unique opcode. The operand, or operands, points to where the data required for the operation can be found and how it can be accessed (the addressing mode, which is conversed in full later). The length of a machine code can vary - ordinary lengths vary from one to twelve bytes in size.
The exact format of the machine codes is again CPU dependant.
Opcodes are also known mnemonics (short names) so that they can be simply referred to in code listings and similar documentation. for instance, an instruction to store the data of the accumulator in a given memory address could be specified the binary opcode 000001, which may then be referred to using the mnemonic STA (short for Store Accumulator).
Now we identify what form the data is in when it is read by the CPU, it is essential to learn about the cycle by which the instructions of a program are executed.
Posted Date: 5/3/2012 7:45:49 AM | Location : United States
Ask an Expert
what is the definition of instructiion set?, Assignment Help, Ask Question on what is the definition of instructiion set?, Get Answer, Expert's Help, what is the definition of instructiion set? Discussions
Write discussion on what is the definition of instructiion set?
Your posts are moderated
Write your message here..
Vdu visual display unit output, VDU (Visual Display Unit) output...
VDU (Visual Display Unit) output Make sure that VDUs are of an appropriate type. They can cause severe eyestrain and tension if you do not check: (a) Colour (
Explain the protection features of ms access, Question 1 Explain the pr...
Question 1 Explain the protection features of MS Access? 2 What is Query Parameter? 3 What are the steps to be taken for improving performance of Microsoft Access database? 4 W
Read only memory (rom), Read only memory (rom): The problem with RAM is...
Read only memory (rom): The problem with RAM is that its memory is volatile, i.e. it loses all its data when the power supply is removed. A non-volatile memory is a permanent
C++, Ask question #MiniA string S is said to be "Super ASCII", if it contai...
Ask question #MiniA string S is said to be "Super ASCII", if it contains the character frequency equal to their ascii values. String will contain only lower case alphabets (''''a''
IPC in linux, to do a assignment regarding IPC in linux
to do a assignment regarding IPC in linux
About the faculty posts, is there any oppurtunity for a mca to teach mcasub...
is there any oppurtunity for a mca to teach mcasubjects online
What is deadlock ?Differentiate two types of resources ?, • A set of proce...
• A set of process is in a deadlock state if each process in the group is waiting for an event that can be caused by only another process in the set. In other words, each member of
Multiple Statement Groups as Suites, Sets of individual statements making u...
Sets of individual statements making up a single code block are known as suites in Python. Composite or complex statements for example if, def while and class are those which neces
MIS, information system providors
information system providors
Nursing care activity module, Nursing Care Activity Module Retrievi...
Nursing Care Activity Module Retrieving of identification data of patient Assessment of the patient - Physical - Mental - Personal - Socio-c
Accounting Assignment Help
Economics Assignment Help
Finance Assignment Help
Statistics Assignment Help
Physics Assignment Help
Chemistry Assignment Help
Math Assignment Help
Biology Assignment Help
English Assignment Help
Management Assignment Help
Engineering Assignment Help
Programming Assignment Help
Computer Science Assignment Help
IT Courses and Help
Why Us ?
~24x7 hrs Support
~Quality of Work
~Time on Delivery
~Privacy of Work
Human Resource Management
Literature Review Writing Help
Follow Us |
T & C
Copyright by ExpertsMind IT Educational Pvt. Ltd.