please answer the following questions one by one and i will give you all the poi

Question

please answer the following questions one by one and i will give you all the points possible

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

2) Which of the following instructions is (are) illegal?
I. LDAA      #500
II. LDAA      #50
III. LDAA      #$255
IV. STAA     #50
V. STAA     $50
VI. LDAA     6, X

3) Identify the addressing mode for each of the following.
I. STAA     $2005
II. LDAA     #$55
III. STAA     $55
IV. CLRA
V. ADDA     0, X

4) Show the status of C and Z flags after each of the following codes.
I. LDAA     #$54
   ADDA     #$C4

II. LDAA     #01
    ADDA     #$FF

5) Show the status of H and N flags after the following code.
LDAA     #$A1
ADDA     #$0F

6) 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

Explanation / Answer

1) LDAA #$00

ADDA #$55

ADDA #$55

ADDA #$55

2) Instructions I, III, and IV are illegal instructions

3) Addressing modes:-

I. Extended

II. Immediate

III. Direct

IV. Inherent

V. Indexed

4) I) Here in this case it has a value larger than zero in the compiler, so Z=0

2) Here in this case it has a zero value in the compiler, so Z=1

5) H = 1 as there is a carry from D3 to D4 bit

N = 1 as the D7 bit is equal to 1

6) ORG $2000

buffer dc.b $55

buffer dc.w $55

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