I have several third-party serial cards; I can't make heads or tails out of them. They are: Serial Grappler Printer Interface (Orange Micro) Dumpling-GX (Microtek) Apple Dumpling (Microtek) Each has dip switches; can anyone tell me the settings on any of them? The Grappler has TWO connectors on it; what's the difference? I didn't get connecting cables; would flat ribbon connectors work?