diff --git a/src/boot.s b/src/boot.s
new file mode 100644
index 0000000..5c4381c
--- /dev/null
+++ b/src/boot.s
@@ -0,0 +1,37 @@
+;;; GRUB Multiboot header, calls main() in main.c
+
+MBOOT_PAGE_ALIGN    equ 1<<0
+MBOOT_MEM_INFO      equ 1<<1
+MBOOT_HEADER_MAGIC  equ 0x1BADB002
+
+MBOOT_HEADER_FLAGS  equ MBOOT_PAGE_ALIGN | MBOOT_MEM_INFO
+MBOOT_CHECKSUM      equ -(MBOOT_HEADER_MAGIC + MBOOT_HEADER_FLAGS)
+
+
+	[bits 32]
+
+	[global mboot]
+	[extern code]
+	[extern bss]
+	[extern end]
+
+mboot:
+	dd  MBOOT_HEADER_MAGIC ; This tells GRUB to start executing here:
+	dd  MBOOT_HEADER_FLAGS
+	dd  MBOOT_CHECKSUM
+   
+	dd  mboot                   ; Current location
+	dd  code                    ; .text section
+	dd  bss                     ; End of .data
+	dd  end                     ; End of kernel
+	dd  start
+
+	[global start]
+	[extern main]				; C code
+
+start:
+	push ebx					; Holds multiboot header location
+
+	cli
+	call main
+	jmp $