Well I was playing some more with my MS-DOS setup, and the annoying thing is that it doesn’t idle worth anything.
And of course running old DOS doesn’t help that most everything needs MS-DOS 5.0 or higher.
The only pain is that running MS-DOS applications kills the CPU (again). Which means that the DOS programs themselves need to idle. And yes I did check the ‘detect idle’ but it seems that it doesn’t do what I’d hope.
Maybe it’s just the software, I should try some more and see what I get.