I have written a description of the heat problems you get if you run
DOS or FreeDOS in VirtualBox.
It can be found at: http://lazybrowndog.net/freedos/virtualbox/heat
Thanks again to Marcos for his suggestions.
regards
Ulrich
I have updated the networked FreeDOS image for VirtualBox to FreeDOS
1.1Beta.
http://http://lazybrowndog.net/freedos/virtualbox/
For my changes to the original FreeDOS installation see the CHANGELOG
at the end of the webpage.
I hope this helps everyone who wants to try DOS networking.
regards