ECET 330 DeVry Week 2 Homework

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ECET 330 DeVry Week 2 Homework

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ECET 330 DeVry Week 2 Homework

ECET330

ECET 330 DeVry Week 2 Homework

ECET 330 DeVry Week 2 Homework

  1. Question: Write a simple program in which the value, $55, is added three times.

Question 2. Question: Which of the following instructions is (are) illegal?

  1. LDAA #500
  2. LDAA #50
  • LDAA #$255
  1. STAA #50
  2. STAA $50
  3. LDAA 6, X

Question 3. Question: Identify the addressing mode for each of the following.

  1. STAA $2005
  2. LDAA #$55
  • STAA $55
  1. CLRA
  2. ADDA 0, X

Question 4. Question: Show the status of C and Z flags after each of the following codes.

  1. LDAA #$54
  2. ADDA #$C4
  3. LDAA #01
  • ADDA #$FF

Question 5. Question: Show the status of H and N flags after the following code.

  1. LDAA #$A1
  2. ADDA #$0F

Question 6. Question: Define a byte-size and word-size variable starting at address $2000. Initialize both variables to $55. You should use ORG, DC.B, and DC.W directives.