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
|
!
! This program destroys the MBR and the start of the first partition of
! the hard disk. IT DOES NOT HAVE AN 'ARE YOU SURE?'
!
org $7c00
include sysboot.s
org dos_sysid
.ascii "DEATH" ! System ID
org codestart
cld
xor ax,ax
mov es,ax
mov ds,ax
mov ss,ax
mov sp,ax
mov di,#$8000
mov cx,#$0800
rep
stosw ! Zap a space.
mov dx,#$0080
mov cx,#$0001
mov bx,#$8000
mov ax,#$0308
int $13 ! Zap the MBR (and a disk manager?)
mov dx,#$0180
mov cx,#$0001
mov bx,#$8000
mov ax,#$0308
int $13 ! Zap the first partition boot and super.
!----------------------------------------------------------------
prtmsg: ! SI = pointer to error message
mov si,#boot_message
nextc:
lodsb
cmp al,#0
jz eos
mov bx,#7
mov ah,#$E ! Can't use $13 cause that's AT+ only!
int $10
jmp nextc
!----------------------------------------------------------------
eos: ! Wait for a key then reboot
reboot:
xor ax,ax
int $16
jmpi $0,$FFFF ! Wam! Try or die!
export boot_message
boot_message:
.asciz "PANIC! OS Destroyed!\r\n"
|
