Question

Write an assembly language 32 bit program that reads in lines of text by a .txt file and read in from the user and prints them diagonally. Using good commenting.

Answer 1

1. .386
2. .model small, c
3. ;----------------------------------------------------------------
4. ; Stak segment
5. stack_seg SEGMENT stack
6. DB 100 DUP(?)
7. stack_seg ENDS
8. ;----------------------------------------------------------------
9. ; Data segment
10. data_seg SEGMENT USE16 'DATA'
11. Msg1 db 0ah,0dh,0ah,0dh,"*******************Write Some Text*******************$"
12. reader db 1024 dup(?)
13. datText db 1024 dup(?)
14. filename db "dat.txt", 0h
15. data_seg ENDS
16. ;----------------------------------------------------------------
17. ; CODE segment
18. code_seg SEGMENT USE16 'CODE'
19. ASSUME cs:code_seg, ds:data_seg
20. start:
21. mov ax, data_seg
22. mov ds, ax
23. mov ax,0
24. mov cx,0
25. ;----------------------------------------------------------------
26. main PROC
27. ;Write on scrin TITLE
28. lea dx,Msg1
29. mov ah,09h
30. int 021h
31. ;New Line
32. mov ah,02h
33. mov dl,0ah
34. int 021h
35. mov ah,02h
36. mov dl,0dh
37. int 021h
38. lea si,reader
39. mov cx,0
40. Here:
41. mov ah,08h
42. int 021h
43. cmp al,0dh
44. je exit; if user press ENTER key exit
45. mov [si],al
46. inc si
47. inc cx
48. jmp Here
49. exit:
50. mov di,cx; counter
51. mov ah, 03ch
52. mov cx, 0
53. lea dx, filename
54. int 21h
55. mov ah, 03Dh
56. mov al, 01h ;
57. lea dx, filename
58. int 21h
59. mov bx, ax ; file-handle
60. mov cx,di
61. ; WRITE in .txt file
62. mov ah, 040h
63. lea dx, reader
64. int 21h
65. ; Close .txt file
66. mov ah, 03eh
67. int 21h
68. ;Open .txt file
69. mov ah,3dh
70. mov al,02h
71. lea dx,filename
72. int 021h
73. MOV CX,??????
74. mov ah,3fh
75. lea dx,datText
76. int 021h
77. lea si,datText
78. ;Here i ned to now count of chars readed from .txt file and mov that number in CX reg (in this case 11 from "Hello world") for example
79. print:
80. cmp CX,0
81. je endX
82. mov ah,02h
83. mov dl,[si]
84. int 021h
85. inc si
86. dec CX
87. jmp print
88. EndX:
89. ;Close .txt file
90. mov ah, 03eh
91. int 21h
92. mov ax, 04c00h
93. int 021h
94. ;*************************************************************************************
95. main ENDP
96. code_seg ENDS
97. END start