Programs for Assembly Language Programming

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1 ;Program to print lower case alphabets.stack 100 mov dl, 'a' mov cl, 26 print: mov ah, 02h inc dl loop print mov ah, 4ch Programs for Assembly Language Programming

2 ;Program to printf upper case alphabets.stack 100 mov dl, 'A' mov cl, 26 print: mov ah, 02h inc dl loop print mov ah, 4ch

3 ;Progrsm to add the numbers in an array blk1 db 01,02,03,04,05,06,07,08,09,0Ah count dw 0ah mov ax,0 mov si,offset blk1 mov cx,count cld l1: add al,[si] inc si dec count jnz l1 mov ch,02h mov cl,04h mov bl,al l2: rol bl,cl mov dl,bl and dl,0fh cmp dl,09 jbe l4 add dl,07 l4:add dl,30h mov ah,02 dec ch jnz l2

4 ;Program to find the average in an array.stack 100h blk1 db 01,02,03,04,05,06,07,08,09,0ah count dw 000ah mov ax,0 mov si,offset blk1 mov cx,count cld l1: add al,[si] inc si dec count jnz l1 mov ah,00 mov bl,0ah div bl mov ch,02h mov cl,04h mov bl,al l2: rol bl,cl mov dl,bl and dl,0fh cmp dl,09 jbe l4 add dl,07 l4:add dl,30h mov ah,02 dec ch jnz l2

5 ;Program to find maximum in an array.stack 100h array db 61h,05h,42h,05h,12h,15h,09h,14h,56h,38h max db 0 xor di,di mov cl,10 lea bx,array mov al,max back: cmp al,[bx+di] jnc skip mov dl,[bx+di] mov al,dl skip: inc di dec cl jnz back mov max,al mov ch,02h mov cl,04h mov bh,al again: rol bh,cl mov dl,bh and dl,0fh cmp dl,09 jbe smaller add dl,07 smaller: add dl,30h mov ah,02 dec ch jnz again

6 ;Program to print the digits.stack 100 mov dl, '0' mov cl, 10 print: mov ah, 02h inc dl loop print mov ah, 4ch

7 ;Program to print the fibonacci series count dw 0ch res db 10 dup(?) mov cx,count mov si,offset res mov al,00h mov bl,01h mov [si],al inc si mov [si],bl inc si up: mov al,[si-2] mov bl,[si-1] add al,bl mov [si],al inc si loop up mov si,offset res mov bp,15 up1: mov bl,[si] mov ch,02h mov cl,04h l2: rol bl,cl mov dl,bl and dl,0fh cmp dl,09 jbe l4 add dl,07 l4: add dl,30h mov ah,02 dec ch jnz l2 mov ah,02h mov dl,'' inc si dec bp jne up1

8 ;Program to display a string msg db 10,'Hello Ankit',10,'$' mov ah,09h lea dx,msg

9 ;Program to input a character and print it msg db 'Enter a character$' msg1 db '$' msg2 db 'Entered character is:$' mov ah,09h lea dx,msg mov ah,01h mov bl,al mov ah,09h lea dx,msg1 mov ah,09h lea dx,msg2 mov ah,02h mov dl,bl

10 ;Program to add two matrices.stack 100h mat1 db 10h,11h,12h,10h,11h,12h,10h,11h,12h mat2 db 02h,02h,02h,02h,02h,02h,02h,02h,02h res3 dw 9 dup(?) mov mov cx,09h mov di, offset mat1 mov bx,offset mat2 mov si,offset res3 back: mov ah,0 mov al,[di] add al,[bx] adc ah,00 mov [si],ax inc di inc bx inc si inc si loop back mov si,offset res3 mov dh,9 l10 : mov ch,04h mov cl,04h mov bx,[si] l2:rol bx,cl mov dl,bl and dl,0fh cmp dl,09 jbe l4 add dl,07 l4: add dl,30h mov ah,02 dec ch jnz l2 mov dl,'' inc si inc si dec dh jnz l10

11 ;Program to subtract two matrices.stack 100h mat1 db 10h,11h,12h,10h,11h,12h,10h,11h,12h mat2 db 02h,02h,02h,02h,02h,02h,02h,02h,02h res3 dw 9 dup(?) mov mov cx,09h mov di, offset mat1 mov bx,offset mat2 mov si,offset res3 back: mov ah,0 mov al,[di] sub al,[bx] sbb ah,00 mov [si],ax inc di inc bx inc si inc si loop back mov si,offset res3 mov dh,9 l10 : mov ch,04h mov cl,04h mov bx,[si] l2:rol bx,cl mov dl,bl and dl,0fh cmp dl,09 jbe l4 add dl,07 l4: add dl,30h mov ah,02 dec ch jnz l2 mov dl,'' inc si inc si dec dh jnz l10

12 ;Program to add two numbers (8-Bit) a db 08h b db 04h mov dl,a add dl,b add dl,30h mov ah,02h

13 ;Program to add two numbers(16-bit) a db 64h b db 64h mov al,a mov bl,b add al,bl mov ch,02h mov cl,04h mov bh,al again:rol bh,cl mov dl,bh and dl,0fh cmp dl,09 jbe smaller add dl,07 smaller:add dl,30h mov ah,02 dec ch jnz again end

14 ;Program to find the factorial (8-Bit) a db 05h mov al,a mov bl,al dec bl again1:mul bl dec bl cmp bl,01 jae again1 mov ch,02h mov cl,04h mov bh,al again:rol bh,cl mov dl,bh and dl,0fh cmp dl,09 jbe smaller add dl,07 smaller:add dl,30h mov ah,02 dec ch jnz again end

15 ;Program to find the factorial (16-Bit) a dw 09h mov ah,0 mov cx,a inc cx mov ax,1 mov bx,1 up:mul bx inc bx cmp bx,cx jne up mov di,ax mov bp,2 mov bx,dx up1:mov ch,04h mov cl,04h l2:rol bx,cl mov dl,bl and dl,0fh cmp dl,09 jbe l4 add dl,07 l4:add dl,30h mov ah,02 dec ch jnz l2 mov bx,di dec bp cmp bp,00 jnz up1

16 ;Program to find the factorial (Recursion).stack 100h num dw 08h mov ax,01 mov bx,num call fact mov di,ax mov bp,2 mov ax,dx up1:mov ch,04h mov cl,04h l2: rol bx,cl mov dl,bl and dl,0fh cmp dl,09 jbe l4 add dl,07 l4: add dl,30h mov ah,02 dec ch jnz l2 mov bx,di dec bp cmp bp,00 jnz up1 fact proc near cmp bx,01 jz l11 l12:mul bx dec bx cmp bx,01 jne l12 ret l11: mov ax,01 ret fact endp

17 ;Program to multiply two numbers (8-Bit) a db 02h b db 04h mov al,a mul b mov ah,02h add al,30h mov dl,al

18 ;Program to multiply two numbers (16-Bit) a db 12h b db 0fh mov al,a mov bl,b mul bl mov ch,02h mov cl,04h mov bh,al a12:rol bh,cl mov dl,bh and dl,0fh cmp dl,09 jbe b14 add dl,07 b14:add dl,30h mov ah,02h dec ch jnz a12 end

19 ;Program to find the square of a number (8-Bit) a db 03h mov al,a mul a mov ah,02h add al,30h mov dl,al

20 ;Program to find the square of a number (16-Bit) no db 13 mov cl,no mov al,no mul cl mov bx,00 p1:cmp al,64h jc p2 sub al,64h inc bl jmp p1 p2:cmp al,0ah jc p3 sub al,0ah inc bh jmp p2 p3: mov ah,02h add bl,30h mov dl,bl mov ah,02h add bh,30h mov dl,bh add cl,30h mov dl,al

21 ;Program to subtract two numbers (8-Bit) a db 06h b db 04h mov dl,a sub dl,b mov ah,02h add dl,30h

22 ;Program to subtract two numbers (16-Bit) a db 0dh b db 0ch mov al,a mov bl,b sub al,bl mov ch,02h mov cl,04h mov bh,al a12:rol bh,cl mov dl,bh and dl,0fh cmp dl,09 jbe b14 add dl,07 b14:add dl,30h mov ah,02 dec ch jnz a12 end

23 ;Program to verify the password.stack 100h pass db 'xyz' msg1 db 10,13,'Enter three char password$' msg2 db 10,13,'Welcome to programming$' msg3 db 10,13,'Invalid Password$' mov mov ah,09h lea dx,msg1 mov cl,00 mov dl,00h xor di,di up: cmp cl,3 je down mov ah,07h lea bx,pass mov ah,[bx+di] cmp al,ah jne l4 add dl,01 inc di l4:inc cl mov ah,02h mov dl,'*' jmp up down: cmp di,3 jne l2 mov ah,09h lea dx,msg2 jmp endd l2: mov ah,09h lea dx,msg3 endd:

24 ;Program to compare two strings PRINT MACRO MES MOV AH, 09H LEA DX, MES INT 21H ENDM.MODEL SMALL.DATA MS1 DB 10,13, "ENTER FIRST STRING:$" MS2 DB 10,13, "ENTER SECOND STRING:$" MS3 DB 10,13, "EQUAL STRINGS$" MS4 DB 10,13, "UNEQUAL STRINGS$" MS5 DB 10,13, "$" BUFF DB 25,?, 25 DUP('$') BUFF1 DB 25,?, 25 DUP('$').CODE mov mov es,ax print ms1 mov ah,0ah lea dx,buff lea si,buff print ms2 mov ah,0ah lea dx,buff1 mov cl,buff+1 mov ch,buff1+1 cmp ch,cl jnz para mov ch,00 mov cl,buff+1 lea di,buff1 cld repe cmpsb jnz para print ms3 jmp quit para: print ms4 quit:

25 ;String operations mess macro msg mov ah,09h lea dx,msg endm.stack 100h str1 db 25,?, 25 dup('$') str3 db 25,?, 25 dup('$') msg1 db 0ah,0dh,'menu $' msg21 db 0ah,0dh,'1.accept $' msg22 db 0ah,0dh,'2.length $' msg3 db 0ah,0dh,'enter your choice: $' msg4 db 0ah,0dh,'wrong choice $' msg5 db 0ah,0dh,'enter the string: $' msg6 db 0ah,0dh,'srting is: $' msg7 db 0ah,0dh,'length is: $' mov mov es,ax ak: mess msg1 mess msg21 mess msg22 mess msg3 mov ah,01h mov bl,al cmp bl,31h je acc cmp bl,32h je len cmp bl,33h je endd mess msg4 jmp ak acc: call accept jmp ak len: call lent endd: accept proc near mess msg5 mov ah,0ah lea dx,str1 ret accept endp lent proc near mess msg7 mov dl,str1+1 or dl,30h mov ah,02h

26 ret lent endp

27 ;String operations title string operations mess macro msg mov ah,09h lea dx,msg endm.stack 100h str1 db 25,?, 25 dup('$') str3 db 25,?, 25 dup('$') msg1 db 0ah,0dh,'menu $' msg21 db 0ah,0dh,'1.accept $' msg22 db 0ah,0dh,'2.length $' msg23 db 0ah,0dh,'3.reverse $' msg24 db 0ah,0dh,'4.palindrome $' msg25 db 0ah,0dh,'5.exit $' msg3 db 0ah,0dh,'enter your choice: $' msg4 db 0ah,0dh,'wrong choice $' msg5 db 0ah,0dh,'enter the string: $' msg6 db 0ah,0dh,'srting is: $' msg7 db 0ah,0dh,'length is: $' msg8 db 0ah,0dh,'the string is a palindrome $' msg9 db 0ah,0dh,'the string is not a palindrome $' mov mov es,ax ak: mess msg1 mess msg21 mess msg22 mess msg23 mess msg24 mess msg25 mess msg3 mov ah,01h mov bl,al cmp bl,31h je acc cmp bl,32h je len cmp bl,33h je rev cmp bl,34h je pal cmp bl,35h je endd mess msg4 jmp ak acc: call accept jmp ak len: call lent jmp ak

28 rev: call reverse jmp ak pal: call pall jmp ak endd: accept proc near mess msg5 mov ah,0ah lea dx,str1 ret accept endp lent proc near mess msg7 mov dl,str1+1 or dl,30h mov ah,02h ret lent endp reverse proc near mess msg6 mov ch,00h mov cl,str1+1 sub cl,01h lea si,str1+2 lea di,str1+2 repz movsb mov cl,str1+1 lea di,str3+2 loop1: mov dx,[si] mov ah,02h mov [di],dx dec si inc di dec cl cmp cl,00h jne loop1 ret reverse endp pall proc near mess msg6 mov ah,09h lea dx,str1+2 call reverse lea di,str3+2 mov ah,00h mov dh,00h lea si,str1+2 mov cl,str1+1 loop2: mov al,byte ptr[si] mov bl,byte ptr[di] dec cl cmp cl,00h

29 je loopa cmp al,bl je loop3 loopa: cmp cl,00h je loop4 mess msg9 jmp loop5 loop4: mess msg8 loop5: ret loop3: inc si inc di jmp loop2 pall endp Ankit Gupta

CONTENTS. 1. Display a Message Display a one Digit Number Accept a Character from keyboard and display the character 4

CONTENTS. 1. Display a Message Display a one Digit Number Accept a Character from keyboard and display the character 4 University of Kashmir, North Campus Course Code Course Name Course Instructor MCA-104-DCE Assembly Language Programming Bilal Ahmad Dar CONTENTS 1. Display a Message 2 2. Display a one Digit Number 3 3.