Thanks for all of your replies. I have spent the week replacing our water heater and all hot water plumbing in our house so no time for anything else. So glad to get rid of all the uninsulated galvanized pipe for insulated PEX, oh what a difference it makes.
I called Yaskawa to see what I could get out of them and they sent me 3 technical documents that are not on the web, anywhere. Two of them look like they apply to my needs. One is Large Capacity Memory Function, Technical Information No. 00028, dealing with the expanded memory and the other is FTP Client Data Input/Output Functions, Technical Information No. 98002. Beyond this the tech didn't know anything. They make the stuff but it is up to the MTB to implement it and support what they did with it, and Kitamura has NO information on this, bummer.
What I do know is that I have the correct hardware for both the expanded memory and ethernet. The ethernet board port is cabled to a D-sub 15pin AUI port on the side of the door. I always wondered what the port was for and now I know. I will have to make a cable to go from this port to the ethernet port on my computer. Once I do this the PC OS and Software needed is Windows NT 4.0, 95 OSR2, or 95, and for the FTP Server Microsoft Peer Web Server or Personal Web Server.
When I make my cable should I just start with a Cat5 patch cable and cut one end off to attach the D-sub 15pin connector? Or maybe I should replace the cable between the control module and the door? That way I could just use a standard Cat5 patch cable. I have the connectors needed to do this and some serial cable if it will work, or do I need Cat5 or Cat6 data cable? Yeah, I really don't know what I am doing.
I have to call Yaskawa back to get the pinout on their board level connector to figure out what wires go where.
I still have an old XP computer if I need it.