Answer to Question #335450 in UNIX/Linux Programming for Secret Agent

Question

1. What is the Difference between MOV AH, 2 and MOV AH, 1
2. What is the Purpose of "LEA" and MOV AH, 9

Answer 1

1) The mov ah, 1 instruction is responsible for character-by-character input from the keyboard. In contrast, mov ah, 2 prints a single character to the screen.

2) The LEA (Load Effective Address) moves the contents of the designated memory location into the target register.

mov ah, 9 - instruction to display a string on the screen.