BITS 16

mov al, 0x21
mov ah, 0x0E
int 0x10

mov ah, 0x02; need to set this to tell int 13 what to do
mov cl, 2; cl tells what sector to read from
mov al, 1; al tells number of sectors to read
mov ch, 0; ch tells cylinder number
mov dh, 0; dh tells head number

mov bx, 0x07E0
mov es, bx
mov bx, 0
int 0x13
jmp 0x07E0:0000

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

mov al, '9'
mov ah, 0x0E
int 0x10