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Write an LC-3 assembly language program to read in a two-digit decimal number whose digits add up to less than 10 and display the sum of those digits in the next line.
Sample execution (user input underlined) : Please enter a two-digit decimal number > 27. The sum of the digits = 9

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Answer:

Explanation:

.MODEL SMALL

.STACK 100H

.DATA

   STR1 DB 0AH,0DH, 'THE SUM OF TWO DIGITS PRENT IN THE GIVEN NUMBER'

   FNUM DB ?

   STR2 DB ' AND '

   SNUM DB ?

   STR3 DB ' IS '

   ANS DB ?

   STR4 DB '

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.CODE

MAIN PROC

   MOV AX, "at" DATA       PLEASE NOTE: your "at" need to be in symbol

   MOV DS,AX                    It is because this text editor who allow the sub-

                                            mission of this answer if i use the symbol format

   MOV AH,2                       that is why put it in bold and parenthesis

   MOV DL,3FH

   INT 21H

   MOV AH,1

   INT 21H

   MOV BL,AL

   MOV FNUM,AL

   INT 21H

   MOV SNUM,AL

   ADD BL,AL

   SUB BL,30H

   MOV ANS,BL

   MOV AH,9

   LEA DX,STR1  

   INT 21H

   MOV AH,4CH

   INT 21H

   MAIN ENDP

END MAIN

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