From the looks of the 100 pin connector, there must be a Galil controller in the computer. You should open the computer case and check the markings of the board connected to the other end of that connecting cable. Please look for markings on the board such as Galil and 17?? or 18?? etc. Please get back to us with that information, or take the board out and place it on a copy machine and send the images from both sides of the board. Then maybe we can help.
KCC