;nasm -f bin Boo.asm -o Boo.bin
;first i reallocate my programe to 0x0600 and then 
;a far jump to  0000:0x0642 
bits	16						
org	0x7c00						
start:	jmp	main					
;print something
Print:
			lodsb				
			or	al, al			
			jz	PrintDone		
			mov	ah, 0eh			
			int	10h
			jmp	Print			
	PrintDone:
			ret				
;this is program entry			
main:
;adjust our segments
    cli						
    xor ax,ax			
    mov     ds, ax
    mov     es, ax
    mov     fs, ax
    mov     gs, ax
    sti
;display message	
mov AH,06H 
mov AL,00H 
mov BH,1FH 
mov CX,0000 
mov DX,184FH 
INT 10H 
mov si,msgLoading
call Print
;move our programe to new entry
mov si,0x7c00
xor ax,ax
push ax
pop es
mov di,0x0600
MOV CX,0100h
REPNZ
MOVSW
;far jmp to new location
JMP     0000:0x0642
nop
nop
;adjust our segment
    cli						
    xor ax,ax			
    mov     ds, ax
    mov     es, ax
    mov     fs, ax
    mov     gs, ax
;set our stack
    mov     ax, 0x0000				
    mov     ss, ax
    mov     sp, 0xFFFF
	sti
;try to load active partiotion
XOR     AX,AX
INT 0x13
XOR     AX,AX
MOV     ES,AX
MOV     SI,0x07BE
LODSB
MOV     DL,AL
LODSB
MOV DH,AL
LODSB
MOV     CL,AL
LODSB
MOV     CH,AL
MOV     BX,0x7C00	
MOV     AH,02h 
MOV     AL,01h 
INT     0x13
jmp 0000:0x7C00

jmp done
done:
hlt
jmp done
;************************************
table DB '0123456789ABCDEF'
msgLoadin  db 0x0D, 0x0A, "ok thats right!", 0x0D, 0x0A, 0x00 
msgLoading  db 0x0D, 0x0A, "Boot Loader Start Please Choose One Active Parttiotion", 0x0D,0x0A,0x00  
          TIMES 446-($-$$) DB 0