Chapter 17 Looking  Under the Hood

Chapter 17 Looking Under the Hood PowerPoint PPT Presentation


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2. Practical PC 5th Edition Chapter 17. Getting Started. In this Chapter, you will learn:How does a computer workWhat do RAM and processing circuitry look likeHow does data get into chipsDoes a computer use the same code for all types of data. 3. Practical PC 5th Edition Chapter 17. Getting Star

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Chapter 17 Looking Under the Hood

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1. Chapter 17 Looking “Under the Hood”

2. 2 Practical PC 5th Edition Chapter 17 Getting Started

3. 3 Practical PC 5th Edition Chapter 17 Getting Started

4. 4 Practical PC 5th Edition Chapter 17 How does a computer work? A computer works by manipulating data Data refers to the symbols that describe people, events, things, and ideas A computer works with data in four ways Accepting input data Processing data Producing output data Storing data Input is the data that goes into a computer The computer puts data into RAM (Random Access Memory), a temporary holding area for data

5. 5 Practical PC 5th Edition Chapter 17 How does a computer work? RAM holds data and tells the computer what to do A computer’s circuitry reads data and processes it Processing data means manipulating it in some way, such as performing a calculation An instruction indicates that data should be transferred from RAM to a printer, modem, or display screen as output Data sent to the hard disk drive is done using a a process called “storing data”

6. 6 Practical PC 5th Edition Chapter 17 How does a computer work?

7. 7 Practical PC 5th Edition Chapter 17 What do RAM and processing circuitry look like? RAM and processing circuitry are contained in “chips” inside PC Chip: nickname for an integrated circuit Integrated circuit: thin slice of silicon etched with microscopic circuitry Microprocessor chip: carries out most of the processing work on PC RAM chips: temporarily hold data ROM chips: hold the instructions for PC to boot up

8. 8 Practical PC 5th Edition Chapter 17 What do RAM and processing circuitry look like? Chip is housed in small, black, rectangular chip carrier Circuit board contains electrical pathways that allow data to travel between chips In a typical PC, a large circuit board houses the microprocessor chip, ROM chips, and support chips Series of RAM chips are connected to a small circuit board called a memory module

9. 9 Practical PC 5th Edition Chapter 17 What do RAM and processing circuitry look like?

10. 10 Practical PC 5th Edition Chapter 17 How does data get into chips? PC works with data converted into code and then into electronic signals that travel through circuits on chips and circuit boards Computer codes are based ones and zeros Each 1 or 0 is a bit (short for binary digit) Eight bits form a byte Data is coded to transmit electronically As data is gathered, processed, stored, and transmitted, special controller chips constantly convert it from one type of signal to another

11. 11 Practical PC 5th Edition Chapter 17 Does a computer use the same code for all types of data? Computers use different codes for different types of data Text data: ASCII, extended ASCII, ANSI, Unicode, or EBCDIC codes Numbers for calculations: binary number system Bitmap images: binary color code for each dot Recorded sound: binary number represents height of wave sample Codes share characteristics Digital: converts data into a finite set of numbers Binary: uses only 0s and 1s Fixed length: use the same number of bits to represent each data item

12. 12 Practical PC 5th Edition Chapter 17 Does a computer use the same code for all types of data?

13. 13 Practical PC 5th Edition Chapter 17 How does software tie into chips, codes, and circuits? Software is a collection of programs or program modules containing a list of instructions Instructions are written in a computer programming language Today’s programming languages use English-like words English-like words must be converted into a machine language of 1s and 0s Compiling is the process of converting English-like words into 1s and 0s Compiling creates executable EXE files

14. 14 Practical PC 5th Edition Chapter 17 Hardware: Microprocessors

15. 15 Practical PC 5th Edition Chapter 17 Hardware: Microprocessors

16. 16 Practical PC 5th Edition Chapter 17 Hardware: Microprocessors

17. 17 Practical PC 5th Edition Chapter 17 Hardware: Microprocessors

18. 18 Practical PC 5th Edition Chapter 17 Who invented the first electronic digital computer?

19. 19 Practical PC 5th Edition Chapter 17 Chapter Summary

20. 20 Practical PC 5th Edition Chapter 17 Chapter Summary

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