Instructions:

1. Write assembly language cods for the given problem and Code should be written with proper comments.

Question# 1: (100 Marks)

• When user types the characters it displays the corresponding character on VGA screen pointed by the cursor with white background and font color black by default just like notepad. Only the most recent character bl The Notepad is commonly used text editor tool. You are required to write an assembly language program to make a Small Notepad text editing tool which has the following functionalities;

• inks, rest should not blink.

• When user presses enter, cursor should move to the next line.

• When user presses the left arrow once, the left character (only one) starts blinking which shows the cursor move towards left side.

• When user presses the right arrow once, the right character (only one) starts blinking which shows the cursor move towards right side

• When user presses the up arrow once, the up character (only one) starts blinking which shows the cursor move towards upside.

• When user presses the down arrow once, the down character (only one) starts blinking which shows the cursor move towards downside.

• When user presses backspace your program must delete the corresponding character pointed by the cursor (the blinking character).

• When user presses the esc, your program should terminate.

Hint: Read about scan codes, INT 10 cursor update service, INT 10 read display memory character service.

Expected Output: