MASTER OF COMPUTER APPLICATIONS
Course Code : MCSL-017
Course Title : C and Assembly Language Programming
Assignment Number : MCA(1)/L017/Assign/2014-15
Maximum Marks : 100
Weightage : 25%
Write a program in assembly language for converting lower case to upper case in a given string of characters.
DATA SEGMENT
MSG1 DB 10,13,’ENTER ANY STRING :- $’
MSG2 DB 10,13,’CONVERTED STRING IS : $’
P1 LABEL BYTE
M1 DB 0FFH
L1 DB ?
P11 DB 0FFH DUP (‘$’)
DATA ENDS
DISPLAY MACRO MSG
MOV AH,9
LEA DX,MSG
INT 21H
ENDM
CODE SEGMENT
ASSUME CS:CODE,DS:DATA
START:
MOV AX,DATA
MOV DS,AX
DISPLAY MSG1
LEA DX,P1
MOV AH,0AH
INT 21H
DISPLAY MSG2
LEA SI,P11
MOV CL,L1
MOV CH,0
CHECK:
CMP [SI],61H
JB DONE
CMP [SI],5BH
UPR: SUB [SI],20H
DONE: INC SI
LOOP CHECK
DISPLAY P11
MOV AH,4CH
INT 21H
CODE ENDS
END START
program code :
[codesyntax lang=”asm” lines=”normal”]
DATA SEGMENT
MSG1 DB 10,13,’ENTER ANY STRING :- $’
MSG2 DB 10,13,’CONVERTED STRING IS : $’
P1 LABEL BYTE
M1 DB 0FFH
L1 DB ?
P11 DB 0FFH DUP (‘$’)
DATA ENDS
DISPLAY MACRO MSG
MOV AH,9
LEA DX,MSG
INT 21H
ENDM
CODE SEGMENT
ASSUME CS:CODE,DS:DATA
START:
MOV AX,DATA
MOV DS,AX
DISPLAY MSG1
LEA DX,P1
MOV AH,0AH
INT 21H
DISPLAY MSG2
LEA SI,P11
MOV CL,L1
MOV CH,0
CHECK:
CMP [SI],61H
JB DONE
CMP [SI],5BH
UPR: SUB [SI],20H
DONE: INC SI
LOOP CHECK
DISPLAY P11
MOV AH,4CH
INT 21H
CODE ENDS
END START
[/codesyntax]
Screen shots :-
After Execution :-
