An input device is any hardware device that sends data to a computer, allowing you to interact with and control it. An example is a laptop as it as a things such as a keyboard (etc.).
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An output device
An output device is any peripheral that receives data from a computer, usually for display, projection, or physical reproduction. Such as a smartphone because it has speakers and a display.
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CPU
Central Processing Unit:
Processes instructions and is often thought as the 'brains' of the computer but it's different because a CPU runs one instruction at a time, it carries billions of instructions per second
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Von Neumann
In 1943-44, mathematician von Neumann and his colleagues had the idea of storing the program instructions as well as the data in memory. The stored-program computer was born
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Components of the CPU:
Control Unit
A component of the CPU that directs the operation of the processor.
Decodes instructions and executes them. Receives signals from the system clock. Directs the timing and control of other parts of the CPU, like the conductor of an orchestra
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Components of the CPU:
Arithmetic Logic Unit (ALU)
The ALU or Arithmetic Logic Unit is where the actual arithmetic operations are done
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Program Counter (PC)
Holds the address of the next instruction to be executed
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Memory Address Register (MAR)
Holds the memory address of the current instruction, and then the data that it uses, so that these can be fetched from memory. Part of the fetch stage.
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Memory Data Register (MDR)
Holds the actual instruction, and then the data that has been fetched from memory. Part of the fetch stage.
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Accumulator
Holds the result of an instruction before it is transferred to memory.
Arithmetic and logic are temporarily stored here.
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Fetch
Causes the next instruction and any data involved to be fetched from main memory
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Decode
Decodes the instruction
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Execute
the instruction is executed/it takes place
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Register
A special fast memory location in the CPU
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Other cards in this set
Card 2
Front
An output device
Back
An output device is any peripheral that receives data from a computer, usually for display, projection, or physical reproduction. Such as a smartphone because it has speakers and a display.
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