[bits 16]
[org 0x7c00]

cli
mov bx,cs
mov ds,bx
mov ss,bx
mov sp,0xfffe

mov ax,0
mov es,ax
mov ax,0x6000
mov word [es:0],0
mov [es:2],ax

mov bx,0x6000
mov es,bx
mov bx,0
sti

mov ah,2 ;service
mov al,1 ;sector count
mov ch,0 ;cylinder
mov cl,2 ;sbector#
mov dh,0 ;head
mov dl,0
int 13h

jc error

;int 0h
mov bx,0
mov es,bx
mov bx,0h
jmp far[es:bx]

error:
mov al,'E'
mov ah,0eh
mov bl,7
mov bh,0
int 10h
jmp $

k:
mov al,'F'
mov ah,0eh
mov bl,7
mov bh,0
int 10h
jmp $

times 510-($-$$) db 0
dw 0xAA55



**Sector2 :**

    [bits 16]

SECTOR2:

mov bx,cs
mov ds,bx
mov es,bx

mov ah,0eh
mov bl,7
mov bh,0
int 10h

call SECTOR3
mov si,msg2
l:
cmp byte [si],0
je exit
mov al,[si]
int 10h
inc si
jmp l
exit:
jmp $
msg2 db "Sector 2 is loaded",0
times 512-($-$$) db 0

[bits 16]

SECTOR3:

mov bx,cs
mov ds,bx
mov es,bx



     mov ah,0eh
mov bl,7
mov bh,0
int 10h
 mov si,msg1
l2:
cmp byte [si],0
je exit3
mov al,[si]
int 10h
inc si
jmp l2
exit3:
retf
; jmp $
msg1 db "Sector 3 is loaded",0
times 512-($-$$) db 0