- Provide two concurrent odometers - a 'trip' odometer, and an 'incremental' odometer.
- Provide a reasonably accurate (drift 1 second or less per day) clock.
- Provide an average speed display.
- Provide most configuration options through a run-time menu system, rather than only at compile-time.
- Maintain user configuration between power cycles.
- Run off a car's electrical system, with a backup battery as well.
- Be built entirely with dedicated parts - not everyone wants to have a game console controller to interact with their rally computer.
My initial version won't have all the features that some more advanced rally computers have - but it should do well enough for casual Time-Speed-Distance (TSD) rallying as well as Stage rally.
