Processor Architecture Von Neuman , Harvard CISC and RISC

Question 1

Von Neuman Architecture

Answer 1

Single control unit
Data and instructions are stored in the same place
Only one bus

Question 2

Pros / Cons of Von Neuman

Answer 2

Pros:
- Simple
- programs are stored in memory

Cons:
- Only one bus
- Cannot pipeline

Question 3

Harvard Aechitecture

Answer 3

Single control unit
Data and instructions separated
One bus each for data and instructions

Question 4

Pros / Cons of Harvard Architecture

Answer 4

Pros:
- Von neuman bottleneck is eliminated
- Pipelining is possible
- Data and Programs are accessed separately

Cons:
- Complexity
- Cost

Question 5

Contemporary Processor Architecture

Answer 5

Separate memory caches

Pros:
- Full separation of data and programs eliminates potential bottleneck

Cons:
- Complexiity
- Extra Cost

Question 6

RISC

Answer 6

Pros:
- Reduced instruction set computers
- Larger set of instructions built into the CPU
- Makes quicker and easier to program

Cons:
- Complexity
- Needs more registers
- A lot of instructions are never used