I'm not entirly sure but about yours but my ecu (motec datsun) just takes the input from the rs232 conection on the back. It's the small guy with about 6 pins I believe. If you need to you can build an adapter to fit any other port as well.
Also Dan, I would like to burn a chip for my civic but I need a pm6 ecu..
Anyone out there have one of those guys lying around?
I have a pg7 from 87 teg if interested. or cashola
or other stuff