org 0h
start:

    xor    ax, ax
       mov    ds, ax
       mov    si, 7C00h
    mov    ax, 0600h
    mov    es, ax
       xor    di, di
       push   100h
 pop    cx

       rep    movsw

    mov eax, [ds:4Ch] ; 
    mov dword [es:int_13h], eax 
    mov word [ds:4Ch], int13_hook 
  mov word [ds:4Eh], es
   pop ds 

 sti
 
    push   es
   mov    ax,next
      push   ax
   retf
next:
   push    dx
  mov     dx, 0
       mov     es, dx
      pop     dx
  mov     cx, 2
       mov     ax, 201h                ; sector 1
  mov     dl, 80h
     mov     bx, 7c00h
   int     13h
 jmp word 0x0000:0x07c00

int13_hook:

       db 0xea
int_13h: dw 0 ; offset
dw  0 ; segment    

Are you trying to run it in pMode ? By the way, I think you posted in a wrong section.

typedef wrote:

Are you trying to run it in pMode ? By the way, I think you posted in a wrong section.

Looks more like bootloader code, trying to chain to previous bootloader code.

Hi everyone

I'm copy the MBR to Second sector, then build below code to bin, cover First sector, remain origin MBR Partition table info. this can normal boot win2k8/win7,but not Winxp