You can add the el-cheapo Onn Optical Mouse from Wal-Mart to the list of non-working mice on Plan9. It works fine with Linux and RISC OS, though.

You WILL NOT get DOSBox working in a console. Ever. Well, not ever unless you hack the source yourself. It's linked against SDL, so therefore it's designed to work in an X environment.

If you want to emulate DOS in a console, then use dosemu.