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The program counter in the processor holds the address of the next instruction needed from main memory. The program counter copies its contents into the memory address register. The memory address register then sends the address along the address bus to main memory and the contents of the memory location specified by the address are sent along the data bus to the memory buffer register. The contents of the memory buffer register are then copied to the current instruction register where they are decoded and executed.
Norris Bernhard
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How does a cell regulate the cell cycle?
The chemicals that regulate the cell cycle are called cyclins. They work by controlling the timing of the cell cycle in eukaryotic cells.
What is the cause of a storm and how does it work?
the water cycle controls it
without heat from the sun the water cycle would?
Without heat from the sun the water cycle would not work .
How doese water cycle work?
water evaporates condenses and forms perception and falls back to earth to compleat the cycle
What helps ribosomes decode messenger RNA?
tRNAs.
What do Fetch Decode and Execute mean in a microprocessor?
Fetch Decode Execute. This is the cycle that processors will follow. Fetch the Instruction, Decode it into machine code, Execute the commands
Is fetch decode execute cycle is used in coding?
No. Fetch-decode-execute is a machine state time paradigm, not a philosophy used in coding.
What is memory cycle in CPU?
fetch decode exec store
What cycle is used by the CPU to execute instructions in a programs?
fetch,decode
What is a CPU cycle?
The sequence of steps that a CPU performs.Also known as fetch-decode-execute cycle.
What are the four steps in the instruction cycle?
1.fetch 2.decode 3.execute
How would you describe the fetch execute cycle?
Fetch Execute Cycle A more complete form of the Instruction Fetch Execute Cycle can be broken down into the following steps: 1. Fetch Cycle 2. Decode Cycle 3. Execute Cycle 4. Interrupt Cycle 1. Fetch Cycle The fetch cycle begins with retrieving the address stored in the Program Counter (PC). The address stored in the PC is some valid address in the memory holding the instruction to be executed. (In case this address does not exist we would end up causing an interrupt or exception).The Central Processing Unit completes this step by fetching the instruction stored at this address from the memory and transferring this instruction to a special register - Instruction Register (IR) to hold the instruction to be executed. The program counter is incremented to point to the next address from which the new instruction is to be fetched. 2. Decode Cycle The decode cycle is used for interpreting the instruction that was fetched in the Fetch Cycle. The operands are retrieved from the addresses if the need be. 3. Execute Cycle This cycle as the name suggests, simply executes the instruction that was fetched and decoded
What are the various phases of an instruction cycle Give the micro operation of fetch and decode phases?
there are 4 phases in instruction cyclefetchdecodeexecutestore
Explain steps involve in instruction execution cycle?
The two-phase process for executing instructions on a typical CPU involves a fetch step and an execute step. Fetch is where the instruction is loaded from memory and execute is where the actions detailed in the instruction are carried out.
What is the fetch-decode-cycle on a computer?
when we execute a program, the starting address is loaded in the program counter. Then for each instruction the processor goes through fetch-decode-execute states. At the fetch state the instruction code is fetched then decoded to understand what exactly has to be done. Then finally it executes that instruction. This process goes on till it reaches the end of the program.
What are the stages of compilation?
fetch, decode and execute
How many machine cycle required for the instance like move a b?
The MOV A,B instruction requires 1 machine cycle and 4 T-states, 3 to fetch the opcode, and 1 to decode/execute it.
