Updates: the holiday week gave me an opportunity to work on this issue a bit more and I discovered that the following entry resolved most of my serial issues (still getting Serial overrun errors scrolling in the terminal where I opened Dosbox though) but at least my home control program runs and can be configured. Correct config file entry serial1=directserial realport:ttyUSB0 Note that I had to remove the realport:COM1 entry as it caused a serial port error and would not open the program. This is...
Dosbox serial support broken from Ubuntu 16.04 to 18.04