I;'m not sure if I ever posted this here, but I found someone who makes cables, instructions and has the software to connect a Bridgeport Series 1 CNC. He has the instructions on how to convert the system to RS232 nd where to wire the cable. Instructions were so good, I was able to have my students (17 year olds) do it on their own.
Search eBay for "Bridgeport RS232" and you should get this link:
http://cgi.ebay.com/ws/eBayISAPI.dll...sPageName=WD1V
Cost is about $65-80