Tool we used:
    NASM(download @ nasm.us)
    VFD(virtual floopy drive, download @ vfd.sourceforge.net)
    Bochs(download @ bochs.sourceforge.net)

Reference
    https://www.youtube.com/watch?v=5ktTFuFBqzU
	http://en.wikipedia.org/wiki/BIOS_interrupt_call#Interrupt_table
    http://www.nasm.us/xdoc/2.11.08/html/nasmdoc3.html#section-3.4.3

Workflow
    coding in asm  -->  compile it --> make a bootable --> run it

Guide

After you writing out the *.asm files, you need an assembler to compile it to a binary file.

Open Command Prompt, cd to this directory. Type following command

    nasm -f bin <asm file name> -o <output file name with extension>

For example,

    nasm -f bin Boot2.asm -o Boot.bin

if you need a .img file, type as follows

    nasm -f bin Boot2.asm -o Boot.img


To makt it bootable, you need a tool mkbt.exe (included in this directory).
Then typing in command line,

    mkbt Boot.bin a:

Note: before the above command, you need to format the floopy drive `a:`

Now, start the file **bochs.bxrc**