The Processor Flashcards
to revise the fetch decode execute cycle
What is the purpose of the processor?
The processor responds to and processes the instructions that drive the computer.
What does the CPU contain?
The CPU contains the Control Unit, The arithmetic/logical unit(ALU) and registers.
What is the order of the three operations that are being carried out?
Fetch decode execute
What happens during the Fetch operation?
causes the next instruction to be fetched from main memory
What happens during the decode operation?
decodes the instruction
What happens during the execute operation?
causes instruction to be executed
What arithmetic operations does the ALU do?
The ALU performs arithmetic operations like addition subtraction, multiplication and division
What 2 types of operations does the ALU perform?
The ALU performs Arithmetic and Logical operations
What logical operations does the ALU perform?
The Logical operations consist of comparing one item with another to determine wether the first data item is smaller than, equal to or greater than the second data item
What are registers?
Registers are special memory cells that operate at very high speed. All arithmetic and logical functions take place within registers.
What is the Von Neumann architecture?
shared memory and bus is used for both data and instructions.
What is the stored program concept?
machine code instructions are fetched and executed serially by a processor that performs arithmetic and logical operators.
What is the Harvard Architecture?
physically separate memories for instructions and data.
