Difference between revisions of "CSC231 Homework 7 Fall 2012"
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| − | Concentrate on the hexadecimal code for each letter. You will notice that 'A' through 'O' have the same upper nybble. 'A' is 0x'''4'''1 and 'O' is 0x'''4'''F. | + | Concentrate on the hexadecimal code for each letter. You will notice that 'A' through 'O' have the same upper nybble. 'A' is 0x'''4'''1 and 'O' is 0x'''4'''F. So, if I wanted to ''squeeze'' a string made of upper-case letters between 'A' and 'O', I would only need to store the lower nybble, and I'd save some memory. |
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| + | The purpose of this problem is for you to take a string created using this method, decode it, and print it on the screen. | ||
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| + | Your program will contain the following 3 strings and should decode them and print them. | ||
Revision as of 12:51, 24 October 2012
--D. Thiebaut 13:47, 24 October 2012 (EDT)
This assignment is due the evening of Oct. 31st, at midnight (booo!). You can work on this assignment in pairs.
Problem #1
Write a program that displays the contents of a double-word in hexadecimal. Your program should store the value 0x1234ABCD in a variable called x and should display this information:
x = 305441741 = 0x1234ABCD
Submission
Submit your program (called hw7a.asm) as follows:
rsubmit hw7 hw7a.asm
Problem #2
Take a look at the section of the ASCII table below:
Concentrate on the hexadecimal code for each letter. You will notice that 'A' through 'O' have the same upper nybble. 'A' is 0x41 and 'O' is 0x4F. So, if I wanted to squeeze a string made of upper-case letters between 'A' and 'O', I would only need to store the lower nybble, and I'd save some memory.
The purpose of this problem is for you to take a string created using this method, decode it, and print it on the screen.
Your program will contain the following 3 strings and should decode them and print them.
