Operating-System-Assembly-16-Bit-/TextEditor.asm at master · ShahabKhalid/Operating-System-Assembly-16-Bit- · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
;------------------------------------------------------
[BITS 16]
[ORG 0x5000]
;------------------------------------------------------


mov al,0x00
call ClearScreen

mov dh,0
mov dl,1
mov bl,0xf0
mov si,_Title
call cPrintString

mov dh,24
mov dl,1
mov bl,0xf0
mov si,_cmdMSg
call cPrintString

mov dh,2
mov dl,1
mov ah,0x02
int 10h

mov bl,0x0f
mov ah,0x09
int 10h


KeyEvent:
	xor ah,ah
	int 16h

	cmp ah,1 	;Escape
	je Back

	cmp ah,14	;BackSpace
	je BackSpace

	cmp ah,28	;Enter
	je NewLine

	mov ah,0x09
	int 10h

	inc dl
	mov ah,0x02
	int 10h

	jmp KeyEvent


BackSpace:
	dec dl
	mov ah,0x02
	int 10h

	mov al,' '
	mov ah,0x09
	int 10h
	jmp KeyEvent


NewLine:
	inc dh
	mov dl,1
	mov ah,0x02
	int 10h

	jmp KeyEvent


Back:
	mov esi,0x1000
	add esi,512
	jmp esi

cli
hlt


;-----------------------INCLUDES------------------------
%include       "Modules/cPrintString.asm"
%include       "Modules/ClearScreen.asm"
;-------------------------------------------------------


;----------------------Declaring Vars----------------
_Title		db 		"Text Editor",0
_cmdMSg	    db 		"Esc - Exit | Clt + S - Save | Clt + N - New File",0
;----------------------------------------------------


times 512 - ($ - $$) db 0