Our task should be creating a very small executable (in this case is a .COM file) in x86 assembly that should print "Hello World!" on the screen.
We will be using DEBUG.EXE that was released after DOS 2.0, it's mainly used to debug 16-bits applications.
You possibly have it on Windows System folder if your running Windows OS.
In Windows XP, it can be found in C:\WINDOWS\SYSTEM32\DEBUG.EXE
Enter in command-lines (I hope you know how to do this... if not, maybe this tutorial isn't good for you), first step should be calling DEBUG.EXE, since C:\WINDOWS\SYTEM32 is included in "PATH" enviroment, you can call it any path or drive:
You can type "?" then press ENTER to see the help.
(Again) A nice description about DEBUG.EXE can be found in...http://mirror.href.com/thestarman/asm/debug/debug.htm