Hi Folks,
I wrote a small tool that can control a CPU Divider of Vortex86 in realtime. No restart needed, no BIOS configuration needed.
It's based on the example code from Vortex86 Software Programming Reference.

USAGE: VTX_CPUD.EXE N, where N=1-8 CPU Divider value. If run without parameters it shows the current value and doesn't make any changes.

I found it helpful to script old software that requires lower CPU speed.
Tested on Vortex86DX and Vortex86MX systems.
Source code attached as well. Feel free to modify to your needs and post changes in this thread.