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1
2
3
4
5
6
7
8
9
10
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;BLACK 0x0
;BLUE 0x1
;GREEN 0x2
;CYAN 0x3
;RED 0x4
;MAGENTA 0x5
;BROWN 0x6
;GREY 0x7
;DARK_GREY 0x8
;LIGHT_BLUE 0x9
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11
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;LIGHT_GREEN 0xA
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12
13
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;LIGHT_CYAN 0xB
;LIGHT_RED 0xC
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14
15
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;LIGHT_MAGENTA 0xD
;LIGHT_BROWN 0xE
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16
17
18
19
20
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;WHITE 0xF
[BITS 16]
[org 0x7C00]
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21
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JMP short Start
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22
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23
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str: db 'THE GAME ',0x00
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24
25
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clear_screen:
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26
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PUSH ax
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27
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MOV al, 02h ; Setting the graphical mode 80x25(text)
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28
29
30
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MOV ah, 00h ; Code of the function of changing video mode
INT 10h ; Call interruption
POP ax
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31
32
33
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RETN
print_string: ; Expects null terminated message in si
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|
34
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PUSH ax
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35
36
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for_print_string_0:
MOV al,[si]
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37
38
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OR al,al
JZ end_for_print_string_0
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|
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39
40
41
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INC si
CALL print_char
JMP for_print_string_0
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42
43
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end_for_print_string_0:
POP ax
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|
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44
45
46
47
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RETN
print_sector:
PUSH ebp
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48
|
MOV ebp, esp
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49
50
51
52
|
PUSH ax
PUSH bx
PUSH cx
PUSH dx
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53
54
|
MOV al, [6 + ebp] ; num
MOV cl, [8 + ebp] ; offset
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55
|
MOV ah, 2
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56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
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XOR ch, ch
XOR dx,dx
INT 0x13
MOV di, 512
XOR ah, ah
IMUL di, ax
XOR si, si
for_print_sector_0:
CMP si, di
JZ end_for_print_sector_0
MOV al,[es:si]
OR al, al
JZ end_print_char_0
CALL print_char
end_print_char_0:
INC si
JMP for_print_sector_0
end_for_print_sector_0:
POP dx
POP cx
POP bx
POP ax
MOV esp, ebp
POP ebp
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80
81
82
83
84
85
86
87
88
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RETN
print_char:
PUSH ax
PUSH bx
MOV ah,0x0E ; Specifies that we want to write a character to the screen
MOV bl,0x02 ; Specifies output text color. Not required, but useful to know
MOV bh,0x00 ; Page number. Leave this alone.
INT 0x10 ; Signal video interrupt to BIOS
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89
90
|
POP bx
POP ax
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|
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91
92
|
RETN
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93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
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Start:
XOR ax, ax
MOV ds, ax
MOV ax, 0x1000
MOV es, ax
XOR bx, bx
CALL clear_screen
PUSH 2 ; num
PUSH 2 ; offset
CALL print_sector ; (offset, num)
ADD esp, 12
for_start_0:
MOV si,str
CALL print_string
;JMP for_start_0
JMP $
TIMES 510 - ($ - $$) db 0
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112
113
114
115
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DW 0xAA55
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