minimultiboot.asm

minimal multi boot source code in assembly . very simple and important.

;
; A micro multiboot compliant core
; Copyright (C) 2001, Dave Poirier
; Distributed under BSD license.
;

%define MBOOT_MAGIC 0x1badb002
%define MBOOT_FLAGS 0x00010002

bits 32
org 0x100000

__entry_point:
   mov edi, 0xB8000
   mov esi, string
   mov ah, 0x0F
   .displaying:
   lodsb
   stosw
   or al, al
   jnz .displaying
   jmp short $

align 4, db 0
header:
   dd MBOOT_MAGIC
   dd MBOOT_FLAGS
   dd 0 - MBOOT_MAGIC - MBOOT_FLAGS
   dd header
   dd __entry_point
   dd end_of_file
   dd end_of_file
   dd __entry_point

string: db "my own test", 0

align 4, db 0
end_of_file: