CS101 Processor and Ram.

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Presentation transcript:

CS101 Processor and Ram

How do the zeros and ones change form in the processor?

Why do we want to know this? We want to know this because the processor is one of the most important inventions of all time We want to be amongst the few people in the world to know the basics of this important invention (and it will be on the quiz)

The basic on/off switches of a processor are arranged to form logic gates In logic gates 0 = false and 1 = true Another way to think about it is: Switch off = 0 = false Switch on = 1 = true Four basic logic gates are: AND gate OR gate XOR gate Inverter (NOT) gate

AND Gate Output

OR Gate Output

XOR Gate Output

Inverter (NOT) Gate Output

Using logic gates… … the four basic gates can be combined to make other gates (NAND, NOR, and XNOR). … zeros and ones can go into the processor and change into different zeros and ones. … the processor can perform basic arithmetic and logic operations.

Which means… … everything your computer does (email, instant message, play games, listen to music, play video, word process, etc) must be broken down into basic arithmetic and logic operations which is accomplished by running zeros and ones through the logic gates found in a processor.

How a program runs on a computer When you double click on a program icon to run a program the programs directions are sent to RAM As the programs directions are needed they are sent to the processor to be processed The processor has two main parts: Control Unit ALU (Arithmetic Logic Unit)

The Control Unit in the processor is responsible for controlling the program as it runs. The Arithmetic Logic Unit in the processor is responsible for basic arithmetic and logic operations.

RAM and CPU

How a program runs on a computer

Upgrading Processor/Ram Notes