Thanks much for your advice. I now have DOSBox Com2 working and the CompuSail program working as well. I apologize for my tardy response as I had shelved the project till this week. Now that my sailing season is past for the year I returned to the project. By the way, my system is Win7,64 bit.

Looking forward to some assistance in getting the serial ports working in DOSBox. I have set up the DOSBox config for serial ports as instructed with the following. serial1=directserial: realport:COM1 serial2=directserial: realport:COM2 Yet, I get the following message upon running DOSBOX for both …