ENEE 3512 Microprocessors Lab 3
Memory Organization
In this lab assignment you create variables and study how they are saved in memory.
- Prelab to be submitted before the beginning of the lab:
- Create 2 byte values all greater than 100 and 2 less than -100. For each value compute its hex.
- Create 2 word values less than -10000 and 2 greater than 30000. Compute their hex.
- Create 4 doubleword values. Each digit in each value must be greater than 9 (e.g. AABBCCDDh).
For each value compute it’s signed decimal and unsigned decimal.
- Determine the hex values for each character in your name. Note that there is a difference between the upper case and lower case.
- Create an Assembly program with the following variables:
- str1 is a string array with first and last name, separated by a carriage return character and a line feed character. Insert enough spaces in the string so that the entire length is a multiple of 4.
- val1 is a byte array with 2 values greater than 100 and 2 less than -100.
- val2 is a word array with 2 values less than -10000 and 2 greater than 30000.
- val3 is a doubleword array with 4 values with all hex digits greater than 9.
- str2 is a string array that contains the 4 values in val3 enclosed in quotes.
Use the prelab values for val1, val2, and val3. Your main procedure should only have .STARTUP.
- Build the program and open it in CodeView. Note the value in DS, SS, ES before pressing F8 and after pressing F8.
- DS = ___. After pressing F8, DS = __
- SS = __. After pressing F8, SS = __
- ES = ___. After pressing F8, ES =__
- Use SHIFT+F3 to change the memory window’s format. Find the format that most properly displays each variable. Note the format below:
- str1:__
- val1:__
- val2:___
- val3:__
- str2:___
NAME:
- Find the segment:offset address of each variable and compute the 20 bit address
- str1:__
- val1:__
- val2:___
- val3:___
- str2:___
- Find the segment:offset address of last element in each variable and compute the 20 bit address
- str1:__
- val1:__
- val2:___
- val3:___
- str2:___
