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How computers work
The CPU & Memory
The parts of a computer
The CPU
MainMemory(RAM)
Arithmetic / Logic unit
Control Unit
Input&
OutputDevices
Data
Control
Instruction
The control unit
Control Unit
Uses electric signals to carry out, execute stored program instructions. This unit communicates with the memory and the arithmetic / logic unit
Memory
MainMemory(RAM)
RAM holds data and instructions for processing. Memory stores program instructions or data only as long as the program is still being used. Once you close the program then everything is lost.
Arithmetic / Logic unit
Arithmetic / Logic unit
Performs 4 kinds of arithmetic operations / mathematical calculations (addition, subtraction, multiplication & division)
The CPU & movement of data and instructions
MainMemory(RAM)
Arithmetic / Logic unit
Control Unit
Input&
OutputDevices
Data
Control
Instruction
Today’s lessonhttp://homepage.cs.uri.edu/faculty/wolfe/book/Readings/Reading04.htm
1. Explain with simple diagrams & short explanations how a CPU works. You should include:
• Control unit
• Arithmetic/Logic unit
• Memory (RAM)
