Just an update....
The new DosBox does not have a config file, but this one (.72) does so you can configure any com port, I put it on my site here if anyone needs it
www.plctrainer.net/DOSBOX.zip
Also you can use any USB's port just need to know what the port address is and put that number in the file
Hope this helps....
Does this mean I will not have to have a "REAL" serial port to use PCIS and communicate with an SLC 150 thru a USB adapter? My old SLC 150 dedicated Win 98 laptop just died, and all I have left are XP SP3 and 7 machines to work with. Wait--I do have one Thinkpad running XP, and that does have a real serial port. I prefer the USB, but would that Thinkpad be better?
Thanks, Tom