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Tuning-in

Task 1 Label this diagram of a Computer system with these terms.

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output processor CPU

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For example:

hard disk, floppy disk, CD-ROM

For example:

monitor,

printer,

plotter,

speaker,

motor

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Task 2

For exampie: keyboard, mouse, lightpen, scanner    ,

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Work in pairs. What other examples of input devices, output devices, and storage devices can you add to the diagram?

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Task 3

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Listening:The CPU

Study this diagram of the Central Processing Unit. Answer these ąuestions.

1    What does ALU mean?

2    What is a register?

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3 What does the contro1 unit do?

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~ Task 4 Listen to Part 1 of the recording. Check your answers to Task 3.

Task 5

Task 6

Listen again to find the answers to these ąuestions.

1    What sort of functions does the ALU perform?

2    Name a logie operation performed by the ALU.

3    Which part of the CPU Controls printers?

4    What is the difference between registers and main rnemory?

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Look at the diagram in Task 3 again. Try to answer these ąuestions

1    What is the function of buses?

2    Which buses are bidirectiorial?

3    What kind of information is carried by the data bus?

4    What does unidirectional mean?

90