Question

Write an Assembly language program to: A- Store the following text " Welcome to Assembly Language" in the ROM at 200H B- Find how many e letters in this word and store the count in the RAM in location 40H

Answer 1

A- DATA SEGMENT

MESSAGE DB " Welcome to Assembly Language "

ENDS

CODE SEGMENT

ASSUME DS : DATA CS : CODE

START:

MOV AX , DATA

MOV DS , AX

LEA DX , MESSAGE

MOV AH , 9

INT 200H

MOV AH , 4CH

INT 200H

ENDS

END START

‐-‐‐--‐---------‐----------------------------------------------------

B- DATA SEGMENT

MSG1 DB "ENTER THE STRING : $"

MSG2 DB " NO OF OCCURRENCES OF e : $"

NEWLINE DB 10,13, '$'

STR1 DB 80 DUP('$')

CNT DB 0

DATA ENDS

CODE SEGMENT

ASSUME DS : DATA ,CS: CODE

START :

MOV AX, DATA

MOV DS,AX

MOV AH,09H

LEA DX, MSG1

INT 40H

MOV AH, OAH

LEA DX,STR1

INT 40H

MOV AH, 09H

LEA DX,NEWLINE

INT 40H

LEA SI,STR1+1

MOV CL,BYTE PTR[SI]

MOV CH,00H

L1 : INC SI

CMP BYTE PTR [SI], 'e'

JNZ L2

INC CNT

L2 : LOOP L1

ADD CNT , '0'

MOV AH, 09H

LEA DX, MSG2

INT 40H

MOV AH,02H

MOV DH,00H

MOV DL,CNT

INT 40H

MOV AH,4CH

INT 40H

CODE ENDS

END START

-----------------------------------------‐-----------

OUTPUT

ENTER THE STRING: Welcome to Assembly Language

NO OF OCCURRENCES OF e : 3