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#l399
http://sourceforge.net/p/freedos/svn/HEAD/tree/kernel/trunk/kernel/kernel.asm#l746

LOL yeah just bragging now,
http://sourceforge.net/p/freedos/svn/HEAD/tree/kernel/trunk/kernel/dosidle.asm