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Programming for GCSE Topic 2.1: Computer Components

T eaching L ondon C omputing. Programming for GCSE Topic 2.1: Computer Components. William Marsh School of Electronic Engineering and Computer Science Queen Mary University of London. Aims. Overview of computer components Example: Raspberry Pi Theme: the Universal Machine. Computers.

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Programming for GCSE Topic 2.1: Computer Components

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  1. TeachingLondon Computing Programming for GCSETopic 2.1: Computer Components William Marsh School of Electronic Engineering and Computer Science Queen Mary University of London

  2. Aims • Overview of computer components • Example: Raspberry Pi • Theme: the Universal Machine

  3. Computers • Principal components of a computer • Processor • Memory • Input and Output

  4. Processor • The part that does the calculation

  5. CPU • Instructions and data read from memory • Results written to memory Memory Instruction Register Registers Data Control Unit ALU Program

  6. Graphics Processing Unit (GPU) • Another computer • Separate card  same chip • Best for graphics calculations • Games • Frame rate

  7. Memory • Lots of different types • Volatile versus permanent • Size and performance

  8. Motherboard • Joins everything together • Standards • Wires inside

  9. PCI sound card Sound blaster live! Interface Devices and Cards • ISA bus Ethernet card

  10. Raspberry Pi Complete small computer Similar to a mobile phone

  11. Memory, CPU, GPU SD Card (under here)

  12. Ethernet controller GPIO USB sockets Power: 5V, 1 A Ethernet socket

  13. Composite video DSI Display I/F Audio Camera connector HDMI socket

  14. Themes

  15. What’s a Computer? • ‘Do anything’ • With a program • ‘Do nothing’ • Without a program • Embedded computers • Control, toys Memory Instruction Register Registers Data Program is data Control Unit ALU Program

  16. Computer Layers • Each layer solves a problem GUI Shell Application Processes Files Operating System Networks Binary data Binary code CPU RAM Disk, I/O Logic Gates

  17. Summary – Computer • Stored program computer • Processor(s) – CPU and GPU • Memory • Data and program • Storage • Idea of a universal machine • Computer + program

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