you'll need a dongle board which fits inside the back of a windows 98 machine and outputs to rs485 cable, the computer will need to have an 8 bit ISA type slot, and if you want a dongle board..you'll have to approach emco.. theres one in the uk www.Emco.co.uk theres also one your side of the pond.. www.emcomaier-usa.com and also a private guy that deals alot in emco in the usa whom might help.. www.manus.biz.

wincam is the software your hunting, it works on windows Xp BUT.. the dongle board wont run on a modern machine.. so your resricted to a 98 mahcine for running, its no biggy, and a great machine to use if you can find a board.

can you take a picture of the board you have in the PC for the lathe? it may well be the same as the mill board