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> [...] suggest where to turn or what to do to > make the serial port function? I don't have my Thinkpad handy to check but there is more than one place in the various set-up routines (various means Windows has some options and then in the Thinkpad Set-Up there are some more and maybe elsewhere too) - if you methodically go through everything you should be ok, this is what worked for me in a similar situation. Be sure nothing else is on the same interrupt or using the same address, etc. Billy Y..