Hi Stuart, There's plenty of Serial Port RS-232 PCI cards available on eBay.Co.UK
Connect with a null modem RS-232 cable to another machine's com port. I've got a rack of 8 machines, 1 of which has an 8 port Moxa PCI card & octopus cable. Easy! There are also 4 com port Moxa PCI cards. Cheers, Craig.
