SDD+Buses+N5

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 * Questions**

1.The processor and its memory are normally linked by three buses. Name these buses and describe the purpose of each.

2. Explain how the control bus differs from the data and address buses.

3. What is the purpose of the clock line?

4. Name two other operations of a control bus and explain what they do.

5. Investigate the classic 1980s computer, the ZX Spectrum. (a) What size was the address bus? (b) Calculate the number of memory locations which this computer would have had (c) What size was the data bus? (d) Calculate the total addressable memory.