first example

1/boot.asm

@@ -0,0 +1,41 @@
+[BITS 16]
+[ORG 0x7c00]
+
+start:
+    xor ax,ax   
+    mov ds,ax
+    mov es,ax  
+    mov ss,ax
+    mov sp,0x7c00
+
+PrintMessage:
+    mov ah,0x13
+    mov al,1
+    mov bx,0xa
+    xor dx,dx
+    mov bp,Message
+    mov cx,MessageLen 
+    int 0x10
+
+End:
+    hlt    
+    jmp End
+     
+Message:    db "Hello"
+MessageLen: equ $-Message
+
+times (0x1be-($-$$)) db 0
+
+    db 80h
+    db 0,2,0
+    db 0f0h
+    db 0ffh,0ffh,0ffh
+    dd 1
+    dd (20*16*63-1)
+	
+    times (16*3) db 0
+
+    db 0x55
+    db 0xaa
+
+	

1/build.sh

@@ -0,0 +1,2 @@
+nasm -f bin -o boot.bin boot.asm
+dd if=boot.bin of=boot.img bs=512 count=1 conv=notrunc