3.2 Computer Architecture (3.1 logic gates - needs pictures, use book) Flashcards
1
Q
What is ‘cache’ memory?
A
The high speed “quick recall” memory often found in processors
2
Q
What is the ‘register’?
A
The CPU’s memory that it uses to temporarily store data
3
Q
What is an ‘accumulator’?
A
The register used for arithmetic and logic calculations
4
Q
What is a ‘CU’?
A
- Control Unit
- It controls the flow of data through the CPU
- It interacts between different parts of the CPU and the computer’s other hardware
5
Q
What is ‘IAS’?
A
- Immediate Access Store
- It is the memory inside the CPU
- It holds data temporarily
6
Q
What is the ‘ALU’?
A
- Arithmetic Logic Unit
- Carries out calculations on data
- Uses +, -, divide, x,
7
Q
What is the job of the ‘input and output’?
A
-To allow user interaction with the computer
8
Q
What are ‘busses’?
A
- They allow components to connect with and talk to each other
- Data busses carry data
- Address busses carry memory of the addresses (?)
9
Q
What was the idea of the Von Neumann computer architecture?
A
To make a computer that was not task-specific.
10
Q
What are the 3 main parts of the Von Neumann architecture?
A
1 The CPU
2 Primary memory, cache memory and registers
3 Input and output devices
11
Q
What is the ‘stored program concept’?
A
- A computer stores multiple program digitally in a read-write format
- It uses random access memory to open any program chosen by the user
12
Q
What is the ‘fetch-execute cycle’?
Fetch—>Decode—>Execute
A
- The CPU fetches the data and stores it in the IAS using the address busses
- Data is moved by travelling through data busses
- Registers then decode the data/instructions
- The CPU refers to the INSTRUCTION SET to interpret the instructions
- The movement of data and decoding is controlled by the CU
- The CPU carried out the instruction with the relevant data
- If any arithmetical calculations need doing, this will be controlled by the ALU
