> LPT1=0x3bc > LPT2=0x378 > LPT3=0x278 > Katsuyuki Ishii (JR4ISF & N8QDB) The correct address for LPT1 is 0378H. LPT2 is 0278H. I would change the .ini file to correspond to this information. Windows and DOS have about 65000+ ports available. Some do not take kindly to being interogated, much less an attempt to write to it. (Unless you have a passion for re formatting your HD ) 73 Ed