Short list of flavors
- RDB Generic: to be interfaced with generic unknown development board, for reprap purpose.
- RDB Specific or Targeted: meant to be paired with a specific board, or at least some range of development boards.
- RDB Feature: accessory functions, non essential such as lcd+keypad, sd card, etc.
- RDB Stepper Drivers: these are usual standard stepper driver(s), with step/dir/en interface.