Hi, Yes Int 2A is needed for the novel client server to work correctly. I added it to FreeDOS, here are some examples,
http://sourceforge.net/p/freedos/svn/HEAD/tree/kernel/trunk/kernel/entry.asm... http://sourceforge.net/p/freedos/svn/HEAD/tree/kernel/trunk/kernel/kernel.as...
LOL yeah just bragging now, http://sourceforge.net/p/freedos/svn/HEAD/tree/kernel/trunk/kernel/dosidle.a...