Buffer		db	200h	DUP(?)
ReadMBR:
	push	ds
	pop	es		;   ES = DS
	mov	Ah,02h		; int 13,2 - read desk sectors
	mov	al,01h		; number of sectors to read
	lea	bx,Buffer		; es:bx point to buffer to save to.
	mov	cx,1		; sector number (   )
	xor	dh,dh		; head number (0-15) (      )
	xor	dl,dl		; drive number (     ) 
				; 80h    
	int	13h
	ret