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What is ISA and instruction?
In computer science, an instruction set architecture (ISA), also called computer architecture, is an abstract model of a computer. A device that executes instructions described by that ISA, such as a central processing unit (CPU), is called an implementation.
What are instructions in computer architecture?
An instruction code is a group of bits that instruct the computer to perform a specific operation. An instruction must also include one or more operands, which indicate the registers and/or memory addresses from which data is taken or to which data is deposited.
What is instruction and execution cycle?
The instruction cycle (also known as the fetch–decode–execute cycle, or simply the fetch-execute cycle) is the cycle that the central processing unit (CPU) follows from boot-up until the computer has shut down in order to process instructions.
What is instruction and instruction set?
An instruction set is a group of commands for a CPU in machine language. All CPUs have instruction sets that enable commands to the processor directing the CPU to switch the relevant transistors. Some instructions are simple read, write and move commands that direct data to different hardware.
What is the correct sequence of execution of an instruction?
Detailed Solution. The correct answer is Fetch instruction, Decode instruction, Read operands, Execute instruction and Store data.
What are the steps of instruction cycle?
In a basic computer, each instruction cycle consists of the following phases:
- Fetch instruction from memory.
- Decode the instruction.
- Read the effective address from memory.
- Execute the instruction.
What is instruction with example?
The definition of instruction is the act of educating, giving the steps that must be followed or an order. An example of instruction is someone giving another person detailed directions to the library. An instruction can also contain data to be used in the operation.
What are types of instructions?
Depending on operation they perform, all instructions are divided in several groups:
- Arithmetic Instructions.
- Branch Instructions.
- Data Transfer Instructions.
- Logic Instructions.
- Bit-oriented Instructions.