Assembly Language Instruction

💡 Question: What will be stored in ACC after the following instructions?

LDM #10

LDD 50 ;Memory[50] contains 7

• 10

• 7

• 50

• 17

💡 Question: What does the following instruction do?

STO 200

• Load ACC into address 200

• Load 200 into ACC

• Store ACC into IX

• Jump to address 200

💡 Question: What does the instruction IN do?

💡 Question: What will be displayed on the screen after these instructions?

LDM #65

OUT

Answer explanation

✏️ Answer: The letter 'A' (since 65 is the ASCII code for 'A').

💡 Question: What will be the value of ACC after execution?

LDM #8

ADD #4

• 12

• 8

• 0000

• 4

💡 Question: What happens after DEC ACC if ACC was 3?

• ACC becomes 4

• ACC becomes 0

• ACC becomes 2

• ACC is unchanged

💡 Question: If ACC = 5 and the following code runs, will the program jump to address 30?

CMP #5

JPE 30

• True
• False

💡 Question: What will be the result of the comparison?

Answer explanation

✏️ Answer: The comparison is False (since 15 ≠ 20), so the program does NOT jump to 80.