cameroon gce advanced level 2025 microprocessor and computer technology 2

Based on the image provided, here is the extracted data, which includes a set of short-answer and essay questions related to microprocessors.

Question 1.1

What is the difference between a microprocessor and a microcontroller?

(2 marks)

Question 1.2

Identify and give the role of the three basic block of a microprocessor.

(3 marks)

Question 1.3

Identify three registers found in a microprocessor and give the function of each.

(2 marks)

Question 1.4

Why do we say a microprocessor is of 32 bits?

(2 marks)

Question 1.5

Differentiate between a maskable and a non maskable interrupt.

(2 marks)

Question 1.6

Is the RESET input a maskable interrupt? Explain your answer.

(2 marks)

Question 1.7

Figure 1 shows the reset circuit of a microprocessor.

Question 1.7.1

Why do we reset a microprocessor?

(2 marks)

Question 1.7.2

Give the role of each of the following components in the circuit:

a) D1

(1 mark)

b) R1

(1 mark)

c) R2

(1 mark)

d) C1

(1 mark)

Question 1.7.3

What happens to the reset circuit when the processor is

a) Powered ON?

(2 marks)

b) Turn OFF?

(2 marks)

Question 1.8

Define opcode and operand, and specify the opcode and the operand in the instruction ADA#$72 (3 marks)

Question 1.9

Does the ALU have any storage facility? Explain your answer.

(2 marks)

Question 1.10

If the data bus width of a microprocessor system is 8 bits, calculate the bit size of Program Counter (PC) required to access 1MB memory.

(2 marks)

Question 1.11

Figure 2 shows an 8-bit microprocessor system. The range addresses of the different peripherals are as follows:

ROM: 0000H to 1FFFFH

RAM1: 2000H to 3FFFH

RAM2: 5000H to 6FFFH

PIA: D000H to D00FH