Lesson 2 - More on the FDE cycle Flashcards Preview

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Flashcards in Lesson 2 - More on the FDE cycle Deck (9)
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1

What are all of the stages of the fde cycle?

- Program Counter copied to Memory Address Register

- Program Counter is incremented

- Address in Memory Address Register accessed in RAM via the address bus

- Data at that address in RAM is copied to the Memory Data Register via the data bus

- Memory Data Register is copied to the Current Instruction Register

- Contents of Current Instruction Register are decoded by the decode unit

- Instruction is split into opcode and operand

- Decoded instruction is executed

2

What are the impacts are increasing the clock speed?

- Requires more energy
- Requires better cooling
-Means more processess can happen at the same time.

3

What are the benefits of having more cores?

- It can have independently running FDE cycles at the same time

4

What is pipeling?

Doing all of the instructions after each other.

5

What is flushing the pipe?

Clearing what is in the CPU registers are sestarting the CPU fde cycle.

6

List four points about the Havard memory architechture

- The instruction sizes can be larger
- It is more expensive than other computer architechtures.
-Is quicker
-Instructions can be fetched in parallel.

7

List two points about Contemporary architechiture.

- Only has one memory cell
- The cahce is split up on the CPU.

8

What would the steps be of LOAD instruction

- The instruction is decoded into the opcode and oprand sections.
- The address is copied into the MAR.
- The value at the address in the MAR is then copied to the MDR.
- The value in the MDR is copied to the ACC.

9

What would the steps be of a STORE instruction

- The instruction is decoded into the opcode and oprand sections.
- The address is copied into the MAR.
- The ACC is copied into the MDR.
- The MDR contents are copied to the location specified by the MAR.