instruction cycle

1. What is instruction cycle explain?
2. What are the steps of instruction cycle?
3. What is instruction cycle for basic computer?
4. What is instruction cycle and machine cycle?
5. What is a instruction format?
6. How many cycles does the two instructions?
7. Why is the instruction cycle called a cycle?
8. What is a zero address instruction?
9. What are the two steps involved in instruction processing?
10. What is the purpose of halt in basic instruction cycle?
11. What is instruction of computer?
12. What is instruction code?

What is instruction cycle explain?

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 are the steps of instruction cycle?

There are six fundamental phases of the instruction cycle:

• fetch instruction (aka pre-fetch)
• decode instruction.
• evaluate address (address generation)
• fetch operands (read memory data)
• execute (ALU access)
• store result (writeback memory data)

What is instruction cycle for basic computer?

The instruction cycle is the time required by the CPU to execute one single instruction. The instruction cycle is the basic operation of the CPU which consist of three steps. The CPU repetitively performs fetch , decode , execute cycle to execute one program instruction.

What is instruction cycle and machine cycle?

The instruction cycle is the process executed by the computer CPU to execute one single program instruction. ... The machine cycle is the part of instruction cycle . And therefore , depending upon the type of the instruction , a single instruction might need one or more machine cycles to get executed by the CPU.

What is a instruction format?

An instruction format defines layout of bits of an instruction, in terms of its constituent parts. An instruction format must include an opcode and implicitly or explicitly, zero or more operands. Each explicit operand is referenced using one of addressing modes.

How many cycles does the two instructions?

If an instruction is in execution phase and any other instructions can't be in the execution phase. So, atleast 7 clock cycles will be taken. Now, it is given that between two instructions latency or delay should be there based on their operation.

Why is the instruction cycle called a cycle?

A program in computer consists of sequence of instructions. Executing these instructions runs the program in computer. Moreover each instruction is further divided into sequence of phases. The concept of execution of an instruction through different phases is called instruction cycle.

What is a zero address instruction?

It may for example enable stack processing: a zero-address instruction implies that the absolute address of the operand is held in a special register that is automatically incremented (or decremented) to point to the location of the top of the stack. From: zero-address instruction in A Dictionary of Computing »

What are the two steps involved in instruction processing?

The simplest model of instruction processing can be a two step process. The CPU reads (fetches) instructions (codes) from the memory one at a time, and executes or performs the operation specified by this. Instruction fetch involves reading of an instruction from a memory location to the CPU register.

What is the purpose of halt in basic instruction cycle?

The HALT instruction suspends CPU operation until a interrupt or reset is received. While in the halted state, the processor will execute NOP's to maintain memory refresh logic.

What is instruction of computer?

In computer science, an instruction is a single operation of a processor defined by the processor instruction set. The size or length of an instruction varies widely, from as little as 4-bits in some microcontrollers to many as multiples of a bytes in some very long instruction word (VLIW) systems.

What is instruction code?

An instruction code is a group of bits that instruct the computer to perform a specific operation. • The operation code of an instruction is a group of bits that define operations such as addition, subtraction, shift, complement, etc.