Marie Activities

Readings and Marie preparation

• Reading assignment in the supplemental textbook (Chapter 4)
• 4.8 Marie
• 4.9 Instruction Processing
• 4.10 A Simple Program
• Marie Simulator zip file
• Online Marie Simulator
• Assignment for MondayWednesday by start of class: Step through ex4_1.mas and ex4_2.mas in the zip file to learn how they work.


• Quiz -- takehome open book
• Due Monday Jan 28th at 11:59 PM
• Refer to Chapter 4 of the ebook. In particular focus on these sections:
• Figure 4.8
• Section 4.8.2 Registers and Buses
• Figure 4.9


• Marie Addition Program Due Monday Jan 28th at 11:59 PM
1. Start at location 100
2. Read a value between 0 and 4 using the input instruction and save this value.
3. Read another value between 0 and 4 using the input instruction.
4. Add these two values.
5. Display the sum of the two values using the output instruction.
6. Jump back to step 2 to repeat (read another two inputs and display the sum)
• Test this Marie Addition Program using these tests:
• 0 plus 0 equals 0
• 0 plus 4 equals 4
• 3 plus 4 equals 7
• 2 plus 1 equals 3
• Submit your code (just the .mas file) to the corresponding Dropbox by the due date.
• Marie Datapath Exercise
• Datapath Simulator Documentation
• addition_datapath.mas
• Run this .mas file in the online MARIE datapath simulator to carefully observe what is happening at each microstep.
• In a separate text document called datapath.txt describe what is happening in each microstep. You must have a specific correct answer for step 1.a, step 1.b, and the rest through step 4.h. This means you will have 30 answers. Only one answer per line (e.g. 1.b is on a line after 1.a).
• Note -- some of these answers will be duplicates.
• Submit your datapath.txt file to the Addition Datapath dropbox by Wednesday, January 30th at 11:59 PM.

Download Chapter 4 in this text. We will be using this for a week or a bit more. We will be using the Marie simulator to learn about computer architecture via a simplified assembly language.