I have looked for similar question but found null. So here I am asking.
I have Win7, a RobotC fo RCX and Mindstorms for RCX (both are old version, but available free). I borrowed an old LEGO kit (9794 Team Challenge) which lacked some parts. It has RCX 1.0 as controller. I borrowed a USB IR Tower from my friend.
After a well installation, I tried RobotC and was asked to download firmware to RCX brick. But RobotC cannot communicate with it because it cannot find the port which I plugged the IR tower to. Inside the preference, there are two available USB port recognized.
I swithced between them but RobotC still cannot find the tower. I have been googling this around for almost a month now.
Thanks for any enlightement.