Denford Software & Machines

To help you dignose which top Baldor control card you currently have:

This is the Denstep top card which used to run with later DOS machines, and earlier Version 2 VR Milling machines.
Only has RS232 connection to maximum of 19200 Baud

This is the newer (current) NextMoveST control card - green seven segment LED.
USB port was added to later versions.
Older software eg, Version 2 milling will have a machine name suffix NS
eg: MicroRouter NS