                 digitalWriteFast(C64_DSR, LOW);
             }
             break;
-        }
-        
+        }        
+    }
+    else
+    {
+        pinModeFast(C64_DSR, INPUT);    // Set as input to make sure it doesn't interfere with UP9600.
+                                        // Some computers have issues with 100 ohm resistor pack
     }
 }
 

        C64Serial.print(F("OK"));
        C64Serial.println();
    }

    Modem_Loop();    
}




;  // Keep this here to pacify the Arduino pre-processor

#define VERSION "0.12b3"

unsigned int BAUD_RATE=2400;
unsigned int WiFly_BAUD_RATE=2400;
