I am fully aware of Centroid and am a
machine tool integrator. I will not use Centroid as they have several
problems which I do not wish fo deal with. Home made drives being one
of them. Poor quality mmi is another.

My question is how to save a very good control that is running dos. I
need to upgrade the system to support USB and the current SBC will not
do that.

I might be stuck with doing a hard wire connection to load large programs.