Day 5

Question 1

What is RTN?

what is the difference between abstract RTN and concrete RTN?

Answer 1

• Register transfer notation
• Abstract - explain to the computer what to do
• Concrete - explain to the computer how to do

Question 2

What is the job of the control signals?

Answer 2

To execute the instructions given by the concrete RTN

Question 3

What is a logic gate

Answer 3

a component of two states

Question 4

What do the following notations mean:

Answer 4

Question 5

What is the meaning of:

• Run
• Strt

Answer 5

Processor state

• Run: 1-bit run/halt indicator
• Strt: Start signal

Question 6

Explain

Answer 6

Steps of instruction interpretation:

• If Run = 0 and Strt = 1 then
  
  • set Run=1
  • call instruction interpretation.
• If Run = 1 then
  
  • Set IR=M[PC], set PC=PC+4
  • call instruction execution

Question 7

What is a multiplexer?

Answer 7

a multiplexer (or mux) is a device that selects between several input signals and forwards it to a single output line

Question 8

What is a bus?

What does a bus provide?

Answer 8

• It is a communication system that transfers data between components inside a computer*
• It provides:*
• data path
• control