I am reporting back on my problem. I got the new serial driver chip (MAX238CNG) for my CP3 and installed it. The lower serial port seems to work ok, as I can find it at COM4 and connects (remember I am trying to avoid this one since I get many reliability issues). However I still cannot fins the upper serial port at COMS 1-20 ! If I cannot solve this I will not update the ROM on the CP3.
