Write a program using 8086 assembly Language (with proper comments) that accepts four characters entered using the keyboard.

Write a program using 8086 assembly Language (with proper comments) that accepts four characters entered using the keyboard. It checks if all these characters are decimal digits. If all of them are decimal digits, then program calculates the equivalent hexadecimal value of the four digit number that has been input. The program then displays this hexadecimal number on the screen. Make suitable assumptions, if any.