(1.1.1) What is the purpose of the CPU?
The Central Processing Unit is responsible for executing tasks and running programs.
(1.1.1) What are the parts of a CPU?
- Control Unit (CU)
- Arithmetic-Logic Unit (ALU)
- Program Counter (PC)
- Memory Address Register (MAR)
- Memory Data Register (MDR)
- Accumulator (ACC)
(1.1.1) What is the Control Unit (CU)?
It coordinates and controls all of the activities taking place within the CPU.
- It decodes instructions and executes them
- It receives signals from the system clock
- It directs the timing and control of other parts
(1.1.1) What is the Arithmetic-Logic Unit (ALU)?
It is where the actual arithmetic operations are done. It also carries out logic operations.
(1.1.1) What is a Register?
It is a very fast memory location in the CPU.
(1.1.1) What are the CPU Registers?
- Program Counter (PC)
- Memory Address Register (MAR)
- Memory Data Register (MDR)
- Accumulator (ACC)
(1.1.1) What is the Program Counter (PC)?
It holds the Address of the next instruction to be executed.
(1.1.1) What is the Memory Address Register (MAR)?
It holds the memory address of the current instruction, and then the data that is uses, so that these can be fetched from memory.
(1.1.1) What is the Memory Data Register (MDR)?
It holds the actual instruction, and then the data that has been fetched from memory.
(1.1.1) How do the MAR and MDR work together?
The MAR knows where to look for data in the RAM and the MDR can keep hold of the data until it is used.
(1.1.1) What is the Accumulator (ACC)?
It holds the result of an instruction before it is transferred to memory.
(1.1.1) What is a Cache?
(1.1.1) What is the name of the CPU operation?
It is the Fetch - Decode - Execute cycle.
(1.1.1) What does ‘Fetch’ mean?
It causes the next instruction and any data involved to be fetched from the main memory.
(1.1.1) What does ‘Decode’ mean?
It decodes the instruction.
(1.1.1) What does ‘Execute’ mean?
The instruction gets executed.
(1.1.1) How do you explain the Cycle?
What is the Stored Program Concept?
What is an input device?
What is an output device?
