OSDev

section .text

_start:
mov ah, 42h
mov dl, 80h
mov si, dap
int 13h
jc _error

mov ah, 0x0E
mov al, 0x29
int 0x10

_exit: jmp _exit

global _start

_error:

mov al, 0x28
call _kputchar
jmp _exit

_kputchar:
pusha
mov ah, 0x0E
int 0x10
popa
ret

section .data

msg_error db "Error!"

dap:
packet_size db 10h
reserved db 00h
N_SEC dw 01h
buff_seg dw 00h
buff_off dw buff
X_SEC dd 0
dd 0

section .bss

buff resb 512