Code: Select all

         .model tiny
         .code
         .386P
         org 100h
         start:
         xor eax, eax
         mov  ax, cs
         shl eax, 4
         mov gdtbase,eax
         lea edx, GDT    
         add gdtbase,edx 
         cli
         lgdt fword ptr gdtlimit   
 ; Войти в прот-моде
         mov eax, cr0  
         or   al, 1     
         mov cr0, eax 
         mov  ax, 8
         mov  es, ax
         mov  ds, ax
         mov eax, cr0
         and  al, 0FEh    
         mov cr0, eax 
 ; Превед, мы в унреале
         xor ax, ax 
         mov ds, ax; 4гиговая 0-база
 ; указатель памяти после rom-bios'a
         mov eax, 100000h
         mov ecx, -1
  @@top:
         mov edx, [eax]
         mov [eax], eax
         cmp eax, [eax]
      jne @@holeshit
        
         mov [eax], edx
         add eax, 4
      loop   @@top 
         call printhex
         ret

     @@holeshit:
         call printhex 
         ret
;------------------------------
     printhex:
         mov  dh,8 
         rol  eax,4
@@loo:   push eax 
         mov  dl,30h 
         and  al,0Fh
         or   dl,al
         cmp  dl,39h 
         jbe @@@ 
         add dl,7
@@@:     mov ah,2 
         int 21h
         pop eax 
         rol eax,4 
         dec dh 
         jnz @@loo
         mov dl,0Dh 
         mov ah,2 
         int 21h
         mov dl,0Ah 
         mov ah,2 
         int 21h
         retn
 GDT label near
  dq 0;
  dq 009F93000000FFFFh; 8-oй  
  gdtlimit        dw      2*8   ; GDT limit
  gdtbase         dd      ?     ; GDT base 
 ends
 end start