1.2.4c LMC

Question 1

What does the ADD instruction do in LMC?

Answer 1

Adds the value at the given memory address to the accumulator.

Question 2

What does the SUB instruction do in LMC?

Answer 2

Subtracts the value in the given memory address from the accumulator.

Question 3

What does the STA instruction do in LMC?

Answer 3

Stores the value in the accumulator at the given memory address.

Question 4

What does the LDA instruction do in LMC?

Answer 4

Loads the value at the given memory address into the accumulator.

Question 5

What does the INP instruction do in LMC?

Answer 5

Allows the user to enter a value which will be held in the accumulator.

Question 6

What does the OUT instruction do in LMC?

Answer 6

Prints the value currently held in the accumulator.

Question 7

What does the HLT instruction do in LMC?

Answer 7

Stops the program at that line, preventing the rest of the code from executing.

Question 8

What does the DAT instruction do in LMC?

Answer 8

Creates a flag with a label at which data is stored.

Question 9

What does the BRZ instruction do in LMC?

Answer 9

Branches to a given address if the value in the accumulator is 0.

Question 10

What does the BRP instruction do in LMC?

Answer 10

Branches to a given address if the value in the accumulator is positive (or 0).

Question 11

What does the BRA instruction do in LMC?

Answer 11

Branches to a given address regardless of what the value in the accumulator is.