Assembly

Implementation

task1

• the idea of task1 is to extract each letter in an 8-bit register and effectively encode it by collecting the step data value in the register

task2

• the idea in task2 part 1 is to find the line on which the points are located, (check if the x or y coordinates are equal) and decreasing the remaining coordinates
• the idea in task2 part 2 is to call the function from part 1 and add it to a vector of distances,then increasing its address
• the idea in task2 part 3 is to take an index and find out its square using either loop or jump , then the comparison with the element in the distance vector

task3

• the idea of task3 is similar to that of task1 , both letters are taken from plain and key and using an algorithm resulting from the tabular matrix, add the resulting letter in enc_string.

The algorithm can be presented as follows:

• if the letter in plain < key, it is subtracted in the ascii code key - plain and 65 is added
• if the letter in plain > key, their difference is subtracted from 26 and 65 is added.
• also, an area is needed to refresh and forget the address of the key in case the string is longer than this

task4

• the idea of task4 is to generate the indexes corresponding to the spiral matrix by using jumps in 4 areas where the spiral matrix is traversed (top side area, then right side, then bottom side, left side and then repeat).
• a zone must also be implemented that decreases the number of steps taken to traverse the zones, because the more the spiral progresses, the more it decreases in "dimension".
• then it is taken from the address where the key matrix is with the generated index and adding it to the letter plain, everything is put at the address where the string must be encoded.