Computer Organization

© Paul Koester, Dallas County Community College, 2018

COSC 2425 – Computer Organization

Lab #4 – MARIE Program

Create a MARIE assembly program which inputs two integers, X and Y, computes 3X + 4Y, and outputs

the result.

Requirements

1. The program must be written in MARIE Assembly Language.

2. It must use a subroutine to perform the multiplications.

3. You do not need to prompt for the input, just use the Input instruction. The user will need to

know to enter X first and then Y.

4. Similarly no text is required with the output, just use the Output instruction.

Hints

1. Lesson 4 has information on downloading the MARIE simulator.

2. Activity 4 will introduce you to MARIE.

3. Example 4.5 in the textbook has an example of using a subroutine. It has one Parameter. You

will need two for the multiply routine. Do that by adding another labelled memory location

before the Subroutine label.

4. The subroutine will need to use a loop to perform the multiply. There is an example of a loop

in Example 4.4.

Upload: Your MARIE assembly file (.mas)

Sample Output: When 4 and 6 are entered