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- 1Describe the function of the control unit.The control unit coordinates the activities of the CPU by directing the flow of data between components of the computer.
- 2Which part of the fetch, decode, execute cycle is the control unit responsible for?The fetch phase. It points to the address of the next instruction to be processed.
- 3What is meant by a bus?A bus is a set of parallel wires which connect two or more components of a computer.
- 4The main types of bus used in a computer are called a system bus. Name the three main types of bus found within this system bus.Address Bus
Data Bus
Control Bus - 5When the CPU wishes to request data, which two busses are required in order to do this?The address bus and data bus.
- 6Describe, in relation to the system bus, how data is fetched from memory.When the CPU wishes to access something in main memory, it's address is sent to memory via the address bus. The data from that address is returned via the data bus.
- 7How many devices can transmit data via a bus at once? Explain why this is the case.Only one device can send data along a bus at once. This is because the pathways for each bus are shared.
- 8True or False? Data busses can send data in one direction only.False. Data can travel in both directions along the data bus.
- 9True or False? Addresses can be sent in both directions along the data bus.False. The address bus only send data in one direction.
- 10Describe the purpose of the control bus.The control bus is designed to transmit command, timing and status signals between system components in order to maintain the flow of data.
- 11Which components of the CPU is represented by the ALU?Arithmetic Logic Unit
- 12Describe the function of the ALU.The ALU performs logical and arithmetic operations on the data.
- 13Give two examples of instructions that the ALU can perform.ADD, SUBTRACT, MULTIPLY, DIVIDE
Binary Shifts
Boolean logic operations (AND, OR, NOT, XOR) - 14Describe what is meant by a register.A register is a high speed, temporary memory location which stores the results of arithmetic and logical operations performed on data.
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- Flashcards on Untitled, created by Zephyr F on 23/01/2019.
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- Zephyr F
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