cli xor ax,ax mov ds,ax mov es,ax cld mov cx,0x100 mov si,0x7c00 mov di,0x8000 rep movsw jmp 0x800:0x56 mov ax,0x201 mov bx,0x7c00 mov dx,0x80 mov cx,0x1 int 0x13 jc error jmp 0x0:0x7c00 error: int 0x19