Assignment #2 Learn memory organization/layout

CSC 3210 – Assignment #2

Objective: Learn memory organization/layout, data transfer concepts and instructions, direct memory access,
memory allocation.
Requirements:
1. (5 points) Implement the following expression in assembly language:
 AX = (val3 + 7) - (var2 + val1) + (5/3)*7
- Assume that val1, val2, and val3 are 16-bit integer variables
- You need to implement the expression the way it is provided, you cannot do any reduction on the
expression while implementing it.
- Initialize val1 with 12 (decimal), val2 with 9 (decimal), and val3 with 2 (decimal)
- You are ONLY allowed to use 16-bit registers.
- Use ONLY mov, add, sub instructions whenever needed.
- Use the debugger to verify your answer.
o Submit the following:
§ Save your source code using your last name, Lastname1.asm and upload the
Lastname1.asm
§ Screenshot (showing the code and register window) of AX register contains the correct result.
2. (5 points) Implement the following expression in assembly language:
 CX = –val2 – val1 + (-val1 + val3) + 3
- Assume that val1, val2, and val3 are 8-bit integer variables
- You need to implement the expression the way it is provided, you cannot do any reduction on the
expression while implementing it.
- Initialize val1 with 12 (decimal), val2 with 9 (decimal), and val3 with 2 (decimal)
- You are NOT allowed to update the values stored in val1, val2, and val3
- You are only allowed to use 16-bit registers to hold intermediate results, whenever needed.
- Use mov, add, sub, movzx, movzx, or neg instructions whenever needed.
- Use the debugger to verify your answer.
o Submit the following:
§ Save your source code using your last name, Lastname2.asm and upload the
Lastname2.asm
§ Screenshot (showing the code and register window) of CX register contains the correct result.
3. (3 points) True/False
(2.1) The instruction, var BYTE ‘?’
The above instruction declares a variable named var and keeps in uninitialized.
(2.2) The instruction, var DWORD “ABCD”
stores the string ‘ABCD’ in to variable named var
(2.3) The instruction, var BYTE “ABCD”
stores the characters ‘A’,’B’,’C’,’D’ in an array of characters named var
4. (2 points) Declare a variable:
Var1 DWORD 2 DUP (6 DUP ( 3 DUP (?) ) )
What is the total size of the array Var1 ? Explain your answer.
Note:
§ Submit your source code by only uploading .ASM file using iCollege in the respective assignment dropbox:
§ Lastname1.ASM, Lastname2.ASM
§ Put the following information as Comment header for .ASM files:
 Student: Full name
 Class: CSC3210
 Assignment#: 2
 Description: This program ………….
§ Follow the program standards as presented in your book. Pay more attention to code comments and
 consistent indentation.