cli                     ; No more interrupts
        lgdt     [cs:GDTR]      ; Load GDT register
        mov      eax, cr0
         or      al, 0x01       ; Set protected mode bit
        mov      cr0, eax
        jmp      8:0x8060

mov   ecx, ss     ; Get stack segment
      shl   ecx, 4      ; Convert to absolute value
      add   ebp, ecx    ; BP becomes EBP
      add   esp, ecx    ; SP becomes ESP

; Initialize segments to point to data area

      mov   eax, 16
      mov    es, ax
      mov    ds, ax
      mov    ss, ax
      mov    fs, ax
      mov    gs, ax