Question

1. Would math instructions be classified as input or output instructions? (1 pt.) 2. What will the value of N7:2 be when the below instruction executes? (1 pt.) -ADD Add Source A 17:0 Source B N7:1 Dest 3. What will the value of N7:5 be when the below instruction executes? (2 pts.) -SUB Subtract Source A N73 30 Source B N7:4 Dest N7:5 4. What will the value of N7:8 be when the below instruction executes? (2 pts.) MUL Multiply Source A Source B Dest N78 Focus

Answer 1

ANSWER:

1. MATH INSTRUCTIONS ARE OUTPUT INSTRUCTION BECAUSE THE MATH INSTRUCTION GETS EXECUTED WHEN THE RUNG BECOMES TRUE.

2. WHEN ADD INSTRUCTION GETS EXECUTED,

   VALUE AT N7:2 = VALUE AT N7:0 + VALUE AT N7:1

   VALUE AT N7:2 = 12+14 = 26

3. WHEN SUB INSTRUCTION GETS EXECUTED,

   VALUE AT N7:5 = VALUE AT N7:3 - VALUE AT N7:4

VALUE AT N7:5 = 30-35 = -5

4. WHEN MUL INSTRUCTION GETS EXECUTED,

   VALUE AT N7:8 = VALUE AT N7:6 * VALUE AT N7:7

VALUE AT N7:8 = 2*9 = 18

5. WHEN DIV INSTRUCTION GETS EXECUTED,

   VALUE AT N7:11 = VALUE AT N7:9 / VALUE AT N7:10

VALUE AT N7:11 =9/2 = 4.5 = 4

INTEGER N7 DONOT TAKE DECIMAL VALUES. SO THEY CORRECT TO THE NEAREST WHOLE INTEGER.

6. WHEN NEG(NEGATE) INSTRUCTION GETS EXECUTED,

   VALUE AT N7:13 = (-1) * (VALUE AT N7:12)

VALUE AT N7:13 = (-1) * 500 = -500

7. BEFORE EXECUTION OF CLR INSTRUCTION, VALUE AT N7:14 = 15

CLR INTRUCTION CLEARS THE VALUE STORED AT THE DESTINATION TO 0.

AFTER EXECUTION OF CLR INSTRUCTION, VALUE AT N7:14 = 0.