15 |
16 | ## 🛠 Setup DOSBox and MASM
17 |
18 | 1. Download and Install [DOSBox](https://www.dosbox.com/download.php?main=1)
19 | 2. Download and extract [MASM](http://www.mediafire.com/download/x13v7gqqmw1pom7/8086_Assembler(TechzClub_joyjophin).zip)
20 | 3. Open DOSBox and Run following commands
21 |
22 |
23 |
24 | ```bash
25 | mount c
26 | c:
27 | ```
28 |
29 |
30 | ### Example
31 |
32 | ```bash
33 | mount c c:/users/aromal/downloads/masm
34 | c:
35 | ```
36 |
37 |
38 | ## 💻 Run
39 |
40 | To run any of these programs in your computer.
41 |
42 | 1. Download and Copy the program you want to run to the MASM folder
43 | 2. Open DOSBox and Run following commands
44 |
45 |
46 |
47 | ```bash
48 | mount c
49 | c:
50 |
51 | masm
52 | link
53 |
54 | ```
55 |
56 |
57 | ### Example
58 |
59 | ```bash
60 | mount c c:/users/aromal/downloads/masm
61 | c:
62 |
63 | masm pattern.asm
64 | link pattern.obj
65 | pattern.exe
66 | ```
67 |
68 |
69 | ## ✍ Author
70 |
71 | [Aromal Anil](https://aromalanil.in)
72 |
73 |
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/add_two_16_bit_numbers.asm:
--------------------------------------------------------------------------------
1 | data segment
2 | msg1 db 0ah,0dh, "Enter first number : $"
3 | msg2 db 0ah,0dh, "Enter second number : $"
4 | msg3 db 0ah,0dh, "Result is : $"
5 | n1 db 07h dup(?)
6 | n2 db 07h dup(?)
7 | data ends
8 |
9 | code segment
10 | assume cs:code,ds:data
11 | start: mov ax,data
12 | mov ds,ax
13 |
14 | ;Getting offset of arrays
15 | mov si,offset n1
16 | mov di,offset n2
17 |
18 | ;Printing "Enter first number"
19 | lea dx,msg1
20 | mov ah,09h
21 | int 21h
22 |
23 | ;Setting Count to 4
24 | mov cl,04h
25 |
26 | ;Getting First Number
27 | first:mov ah,01h
28 | int 21h
29 | sub al,30h
30 | mov [si],al
31 | inc si
32 | dec cl
33 | jnz first
34 |
35 | ;Printing "Enter second number"
36 | lea dx,msg2
37 | mov ah,09h
38 | int 21h
39 |
40 | ;Setting count to 4
41 | mov cl,04h
42 |
43 | ;Getting second Number
44 | second:mov ah,01h
45 | int 21h
46 | sub al,30h
47 | mov [di],al
48 | inc di
49 | dec cl
50 | jnz second
51 |
52 | ;Clearing carry
53 | clc
54 |
55 | ;Setting count to 4
56 | mov cl,04h
57 |
58 | ;Performing Addition
59 | addition:dec di
60 | dec si
61 | mov al,[si]
62 | mov bl,[di]
63 |
64 | adc al,bl
65 | mov ah,00h
66 | aaa
67 |
68 | ;Storing result to di array
69 | mov [di],al
70 |
71 | dec cl
72 | jnz addition
73 |
74 | ;Printing "Result is"
75 | lea dx,msg3
76 | mov ah,09h
77 | int 21h
78 |
79 | ;Printing Result
80 | mov bh,00h
81 | mov dl,30h
82 | adc dl,bh
83 | cmp dl,30h
84 | je skip
85 |
86 | ;Printing Carry
87 | mov ah,02h
88 | int 21h
89 |
90 | skip:
91 | ;Setting Count to 4
92 | mov cl,04h
93 |
94 | ;Printing array content
95 | print:mov dl,[di]
96 | add dl,30h
97 |
98 | mov ah,02h
99 | int 21h
100 |
101 | inc di
102 | dec cl
103 | jnz print
104 |
105 | mov ah,4ch
106 | int 21h
107 | code ends
108 | end start
109 |
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/add_two_4_bit_numbers.asm:
--------------------------------------------------------------------------------
1 | DATA SEGMENT
2 | num1 DB ?
3 | num2 DB ?
4 | msg1 DB 0ah,0bh,"Enter first Number : $"
5 | msg2 DB 0ah,0bh,"Enter second Number : $"
6 | msg3 DB 0ah,0bh,"result is $"
7 | DATA ENDS
8 |
9 | CODE SEGMENT
10 | ASSUME DS:DATA,CS:CODE
11 |
12 | START : MOV AX,DATA
13 | MOV DS,AX
14 | LEA DX,msg1
15 | MOV AH,09H
16 | INT 21H
17 | MOV AH,01H
18 | INT 21H
19 | SUB AL,30H
20 | MOV num1,AL
21 |
22 | LEA DX,msg2
23 | MOV AH,09H
24 | INT 21H
25 | MOV AH,01H
26 | INT 21H
27 | SUB AL,30H
28 | MOV num2,AL
29 |
30 |
31 | LEA DX,msg3
32 | MOV AH,09H
33 | INT 21H
34 |
35 | ADD AL,num1
36 |
37 | MOV AH,00H
38 | AAA
39 | MOV BX,AX
40 | ADD BX,3030H
41 | MOV DL,BH
42 | MOV AH,02H
43 | INT 21H
44 | MOV DL,BL
45 | MOV AH,02H
46 | INT 21H
47 | MOV AH,4CH
48 | INT 21H
49 |
50 |
51 | CODE ENDS
52 | END START
53 |
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/add_two_8_bit_numbers.asm:
--------------------------------------------------------------------------------
1 | DATA SEGMENT
2 |
3 | MSG1 DB "Enter first number : $"
4 | MSG2 DB "Enter second number : $"
5 | MSG3 DB "Result is : $"
6 |
7 | DATA ENDS
8 |
9 |
10 | CODE SEGMENT
11 |
12 | ASSUME DS:DATA, CS:CODE
13 |
14 | START: MOV AX,DATA
15 | MOV DS,AX
16 |
17 | ;Print first message
18 | LEA DX,MSG1
19 | MOV AH,09H
20 | INT 21H
21 |
22 | ;Read first digit of number 1
23 | MOV AH,01H
24 | INT 21H
25 | SUB AL,30H
26 | MOV BH,AL
27 |
28 | ;Read second digit of number 1
29 | MOV AH,01H
30 | INT 21H
31 | SUB AL,30H
32 | MOV BL,AL
33 |
34 | ;Print second Message
35 | LEA DX,MSG2
36 | MOV AH,09H
37 | INT 21H
38 |
39 | ;Read first digit of number 2
40 | MOV AH,01H
41 | INT 21H
42 | SUB AL,30H
43 | MOV CH,AL
44 |
45 | ;Read second digit of number 2
46 | MOV AH,01H
47 | INT 21H
48 | SUB AL,30H
49 | MOV CL,AL
50 |
51 | ;Performing AL=BL+CL
52 | ADD BL,CL
53 | MOV AL,BL
54 |
55 | ;Splitting AL into AH & AL
56 | MOV AH,00H
57 | AAA
58 |
59 | ;Saving result of first addition to BL(temperory)
60 | MOV BL,AL
61 |
62 | ;Performing AL=BH+CH+AH
63 | MOV AL,AH
64 | ADD AL,BH
65 | ADD AL,CH
66 |
67 | ;Splitting result into AH & AL
68 | MOV AH,00H
69 | AAA
70 |
71 | ;CH=AH,CL=AL
72 | MOV CH,AH
73 | MOV CL,AL
74 |
75 | ;Print last message
76 | LEA DX,MSG3
77 | MOV AH,09H
78 | INT 21H
79 |
80 | ;Converting result to ascii
81 | ADD CH,30H
82 | ADD CL,30H
83 | ADD BL,30H
84 |
85 |
86 | ;Printing Result
87 |
88 | ;If first digit is zero skip it
89 | CMP CH,30H
90 | JE LB
91 |
92 | MOV DL,CH
93 | MOV AH,02H
94 | INT 21H
95 |
96 | LB:
97 | MOV DL,CL
98 | MOV AH,02H
99 | INT 21H
100 |
101 | MOV DL,BL
102 | MOV AH,02H
103 | INT 21H
104 |
105 | ;Closing
106 | MOV AH,4CH
107 | INT 21H
108 |
109 |
110 | CODE ENDS
111 | END START
112 |
--------------------------------------------------------------------------------
/asending_sort.asm:
--------------------------------------------------------------------------------
1 | data segment
2 |
3 | msg1 db 0ah,0dh,"Enter the no of elements : $"
4 | msg2 db 0ah,0dh,"Enter the numers : $"
5 | msg3 db 0ah,0dh,"Sorted array is : $"
6 | n db ?
7 | n1 db 09h dup(?)
8 |
9 | data ends
10 | code segment
11 | assume cs:code,ds:data
12 | start: mov ax,data
13 | mov ds,ax
14 |
15 | ;Printing "Enter the limit"
16 | lea dx,msg1
17 | mov ah,09h
18 | int 21h
19 |
20 | mov ah,01h
21 | int 21h
22 | sub al,30h
23 | mov n,al
24 |
25 | mov cl,n
26 |
27 | ;Printing "Enter the numbers"
28 | lea dx,msg2
29 | mov ah,09h
30 | int 21h
31 |
32 | mov si,offset n1
33 |
34 | read:mov ah,01h
35 | int 21h
36 | sub al,30h
37 | mov [si],al
38 | inc si
39 | dec cl
40 | jnz read
41 |
42 | mov cl,n
43 | loop1:
44 | mov ch,n
45 | mov si,offset n1
46 | loop2:
47 | mov dl,[si]
48 | cmp dl,[si+1]
49 | jnc swap
50 | jmp swapped
51 |
52 | swap:mov dl,[si]
53 | xchg dl,[si+1]
54 | mov [si],dl
55 |
56 | swapped:inc si
57 | dec ch
58 | jnz loop2
59 |
60 | dec cl
61 | jnz loop1
62 |
63 | ;Printing "Sorted Array is"
64 | lea dx,msg3
65 | mov ah,09h
66 | int 21h
67 |
68 |
69 | ;printing Array
70 | mov si,offset n1
71 | mov cl,n
72 | inc si
73 |
74 | print:
75 | mov dl,[si]
76 | add dl,30h
77 | mov ah,02h
78 | int 21h
79 |
80 | inc si
81 | dec cl
82 | jnz print
83 |
84 | mov ah,4ch
85 | int 21h
86 |
87 | code ends
88 | end start
89 |
90 |
91 |
--------------------------------------------------------------------------------
/desending_sort.asm:
--------------------------------------------------------------------------------
1 | data segment
2 |
3 | msg1 db 0ah,0dh,"Enter the no of elements : $"
4 | msg2 db 0ah,0dh,"Enter the numers : $"
5 | msg3 db 0ah,0dh,"Sorted array is : $"
6 | n db ?
7 | n1 db 09h dup(?)
8 |
9 | data ends
10 | code segment
11 | assume cs:code,ds:data
12 | start: mov ax,data
13 | mov ds,ax
14 |
15 | ;Printing "Enter the limit"
16 | lea dx,msg1
17 | mov ah,09h
18 | int 21h
19 |
20 | mov ah,01h
21 | int 21h
22 | sub al,30h
23 | mov n,al
24 |
25 | mov cl,n
26 |
27 | ;Printing "Enter the numbers"
28 | lea dx,msg2
29 | mov ah,09h
30 | int 21h
31 |
32 | mov si,offset n1
33 |
34 | read:mov ah,01h
35 | int 21h
36 | sub al,30h
37 | mov [si],al
38 | inc si
39 | dec cl
40 | jnz read
41 |
42 | mov cl,n
43 | loop1:
44 | mov ch,n
45 | mov si,offset n1
46 | loop2:
47 | mov dl,[si]
48 | cmp dl,[si+1]
49 | jc swap
50 | jmp swapped
51 |
52 | swap:mov dl,[si]
53 | xchg dl,[si+1]
54 | mov [si],dl
55 |
56 | swapped:inc si
57 | dec ch
58 | jnz loop2
59 |
60 | dec cl
61 | jnz loop1
62 |
63 | ;Printing "Sorted Array is"
64 | lea dx,msg3
65 | mov ah,09h
66 | int 21h
67 |
68 |
69 | ;printing Array
70 | mov si,offset n1
71 | mov cl,n
72 | print:
73 | mov dl,[si]
74 | add dl,30h
75 | mov ah,02h
76 | int 21h
77 |
78 | inc si
79 | dec cl
80 | jnz print
81 |
82 | mov ah,4ch
83 | int 21h
84 |
85 | code ends
86 | end start
87 |
88 |
89 |
--------------------------------------------------------------------------------
/linear_search.asm:
--------------------------------------------------------------------------------
1 | data segment
2 | msg1 db 0ah,0dh,"Enter the string : $"
3 | msg2 db 0ah,0dh,"Enter the key : $"
4 | msg3 db 0ah,0dh,"Key found$"
5 | msg4 db 0ah,0dh,"Key not found$"
6 | n db 09h dup(?)
7 | data ends
8 |
9 | code segment
10 | assume cs:code,ds:data
11 | start: mov ax,data
12 | mov ds,ax
13 |
14 | ;Getting offset of array
15 | mov si,offset n
16 |
17 | ;Printing message1
18 | lea dx,msg1
19 | mov ah,09h
20 | int 21h
21 |
22 | mov cl,00h
23 |
24 | ;Reading string
25 | scan:mov ah,01h
26 | int 21h
27 |
28 | cmp al,0dh
29 | jz ended
30 | mov [si],al
31 | inc cl
32 | inc si
33 | jmp scan
34 |
35 | ended:
36 | ;printing msg2
37 | lea dx,msg2
38 | mov ah,09h
39 | int 21h
40 |
41 |
42 | ;Reading key
43 | mov ah,01h
44 | int 21h
45 | mov bl,al
46 |
47 | mov ch,00h
48 | check:dec si
49 |
50 | cmp bl,[si]
51 | jz found
52 | dec cl
53 | jnz check
54 |
55 | jmp notfound
56 |
57 | found:
58 | ;Printing message1
59 | lea dx,msg3
60 | mov ah,09h
61 | int 21h
62 | jmp finish
63 |
64 | notfound:
65 | ;Printing message1
66 | lea dx,msg4
67 | mov ah,09h
68 | int 21h
69 |
70 |
71 | finish:
72 | mov ah,4ch
73 | int 21h
74 |
75 | code ends
76 | end start
77 |
--------------------------------------------------------------------------------
/pallindrome.asm:
--------------------------------------------------------------------------------
1 | data segment
2 | msg1 db 0ah,0dh,"Enter the string : $"
3 | msg2 db 0ah,0dh,"Is a pallindrome $"
4 | msg3 db 0ah,0dh,"Is not a pallindrome $"
5 | n db 09h dup(?)
6 | data ends
7 | code segment
8 | assume cs:code,ds:data
9 | start: mov ax,data
10 | mov ds,ax
11 |
12 | ;Getting offset of array
13 | mov si,offset n
14 | mov di,offset n
15 |
16 | ;Printing message1
17 | lea dx,msg1
18 | mov ah,09h
19 | int 21h
20 |
21 | mov cl,00h
22 | ;Reading string
23 | scan:mov ah,01h
24 | int 21h
25 |
26 | cmp al,0dh
27 | jz ended
28 | mov [si],al
29 | inc cl
30 | inc si
31 | jmp scan
32 |
33 | ended:
34 | dec si
35 | mov bl,[si]
36 | cmp [di],bl
37 | jnz notpal
38 | inc di
39 | dec cl
40 | jnz ended
41 |
42 |
43 | pal:
44 | ;Printing pallindrom
45 | lea dx,msg2
46 | mov ah,09h
47 | int 21h
48 | jmp stoped
49 |
50 | notpal: ;Printing not pallindrom
51 | lea dx,msg3
52 | mov ah,09h
53 | int 21h
54 |
55 | stoped:
56 | mov ah,4ch
57 | int 21h
58 |
59 |
60 | code ends
61 | end start
62 |
--------------------------------------------------------------------------------
/pattern.asm:
--------------------------------------------------------------------------------
1 | ; An assembly program which prints the pattern
2 | ; 1
3 | ; 1 2
4 | ; 1 2 3
5 | ; 1 2 3 4
6 |
7 | data segment
8 |
9 | nxtline db 0ah,0dh,"$"
10 | space db " $"
11 | n db 00h
12 | m db 00h
13 |
14 | data ends
15 | code segment
16 | assume cs:code,ds:data
17 | start: mov ax,data
18 | mov ds,ax
19 |
20 | loop1:
21 | inc n
22 | mov m,00h
23 |
24 | loop2:
25 | inc m
26 |
27 | ;Printing m
28 | mov dl,m
29 | add dl,30h
30 | mov ah,02h
31 | int 21h
32 |
33 | ;Print space
34 | lea dx,space
35 | mov ah,09h
36 | int 21h
37 |
38 | ;If m!=n go to loop2
39 | mov bl,m
40 | cmp n,bl
41 | jne loop2
42 |
43 | ;If n=4 go to loopend
44 | cmp n,04h
45 | je loopend
46 |
47 | ;Print nextline
48 | lea dx,nxtline
49 | mov ah,09h
50 | int 21h
51 |
52 | ;Goto loop1
53 | jmp loop1
54 |
55 | loopend: mov ah,4ch
56 | int 21h
57 |
58 | code ends
59 | end start
--------------------------------------------------------------------------------
/prime.asm:
--------------------------------------------------------------------------------
1 | ;Assembly program to find whether an 8-bit number is prime or not
2 |
3 | data segment
4 | A db 1,2,3,5,7
5 | msg1 db 0ah,0dh,"Enter the number : $"
6 | isprime db 0ah,0dh,"The number is Prime$"
7 | notprime db 0ah,0dh,"The number is not Prime$"
8 | data ends
9 |
10 | code segment
11 | assume cs:code,ds:data
12 | start: mov ax,data
13 | mov ds,ax
14 |
15 | ;Print "Enter the number : "
16 | lea dx,msg1
17 | mov ah,09h
18 | int 21h
19 |
20 | ;Getting the number at bx
21 | mov ah,01h
22 | int 21h
23 | mov bh,al
24 | mov ah,01h
25 | int 21h
26 | mov bl,al
27 | sub bx,3030h
28 |
29 | mov dl,05h
30 | mov si,offset A
31 | mov ch,[si]
32 | mov cl,00h
33 |
34 | loop1:mov ax,bx
35 | aad
36 | div ch
37 | cmp ah,00h
38 | jne loop2
39 | inc cl
40 |
41 | loop2:inc si
42 | mov ch,[si]
43 | dec dl
44 | jne loop1
45 | cmp cl,01h
46 | je jmpprime
47 |
48 | ;Printing "The number is not Prime"
49 | lea dx,notprime
50 | mov ah,09h
51 | int 21h
52 |
53 | jmp finish
54 |
55 | ;Printing "The number is Prime"
56 | jmpprime:lea dx,isprime
57 | mov ah,09h
58 | int 21h
59 |
60 | finish:mov ah,4ch
61 | int 21h
62 | code ends
63 | end start
64 |
65 |
--------------------------------------------------------------------------------
/print_hello_world.asm:
--------------------------------------------------------------------------------
1 | DATA SEGMENT
2 | msg DB "Hello World$"
3 | DATA ENDS
4 | CODE SEGMENT
5 | ASSUME CS:CODE,DS:DATA
6 | START: MOV AX,DATA
7 | MOV DS,AX
8 | LEA DX,msg
9 | MOV AH,09H
10 | INT 21H
11 | MOV AH,4CH
12 | INT 21H
13 | CODE ENDS
14 | END START
15 |
--------------------------------------------------------------------------------
/string_reversal.asm:
--------------------------------------------------------------------------------
1 | data segment
2 | msg1 db 0ah,0dh,"Enter the string : $"
3 | msg2 db 0ah,0dh,"Reverse is : $"
4 | n db 09h dup(?)
5 | data ends
6 |
7 | code segment
8 | assume cs:code,ds:data
9 | start: mov ax,data
10 | mov ds,ax
11 |
12 | ;Getting offset of array
13 | mov si,offset n
14 |
15 | ;Printing message1
16 | lea dx,msg1
17 | mov ah,09h
18 | int 21h
19 |
20 | mov cl,00h
21 | ;Reading string
22 | scan:mov ah,01h
23 | int 21h
24 |
25 | cmp al,0dh
26 | jz ended
27 | mov [si],al
28 | inc cl
29 | inc si
30 | jmp scan
31 |
32 | ended:
33 | ;printing msg2
34 | lea dx,msg2
35 | mov ah,09h
36 | int 21h
37 |
38 | print:dec si
39 |
40 | mov dl,[si]
41 | mov ah,02h
42 | int 21h
43 | dec cl
44 | jnz print
45 |
46 | mov ah,4ch
47 | int 21h
48 |
49 | code ends
50 | end start
51 |
--------------------------------------------------------------------------------