Get any computer that is running Linux and has a working parallel port. :) I'm using a 386DX with 4MB RAM 40MB HD. You will need gcc to compile the program. If you want to use telnet or SSH, you will also need telnetd or sshd. You can write your own program by using ioperm and outb. If you would like to use my program, you will need g++.
Click the following link to download my program. You will need g++ to compile it. http://edc.sourceforge.net/paralle.tar.gz.