ASSEMBLY LANGUAGE - VISUAL STUDIOS (IDE) Write a Program to print the sum of two

Question

ASSEMBLY LANGUAGE - VISUAL STUDIOS (IDE)

Write a Program to print the sum of two hex digits.

Example:

Enter first hex digit: 1

Enter second hex digit: A

Hex sum = B

Use ReadHex to read hex digit from keyboard.

Example: call ReadHex ;Input hexDig1

mov hexDig1, AL   

To write a hex digit to the screen we will use author's routine, WriteHex. The routine is written to write a hex number but we will use it to just write a single hex digit.

movzx EAX, hexSum ;Print hexSum

call WriteHex

Use the following Definitions:

.data

hex1Msg BYTE

hex2Msg BYTE   

hexSumMsg BYTE "Hex sum = ", 0

hexDig1 BYTE ?

hexDig2 BYTE ?

hexSum BYTE ?

Explanation / Answer

The following is the assembly code.

I hope this solves your problem

.data
hex1Msg BYTE “enter First hex number”, 0ah, 0dh, "$"
hex2Msg BYTE “Enter 2nd hex number”, 0ah, 0dh, "$"
hexSumMsg BYTE "Hex sum = ", 0ah, 0dh, "$"
hexDig1 BYTE ?
hexDig2 BYTE ?
hexSum BYTE ?

.code
Main proc
LEA DX, hex1Msg
MOV AH, 9
INT 21H ;Displays 1st msg for the user to enter hex number

call ReadHex
MOV hexD1g1, EAX
MOV AX, hexDig2

LEA DX, hex2Msg
MOV AH, 9
INT 21H

call ReadHex
MOV hexDig2, EAX
MOV BX, hexDig1

ADD AX,BX

mov hexSum, AL

LEA DX, hexSumMsg
MOV AH, 9
INT 21H

mov EAX, hexSum
call WriteHex

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