I can't find the list with specs any more. The only thing sure, it was about one of the Start models.
TomTom Tutorials & FAQ and for For an excellent tutorial clean install read LemonFish his post
TomTom GO 910 - Navcore 9.510 Bootloader 5.5128 Hitachi HDD replaced by SDHC 32GB Class 10
TomTom Rider v2 - Navcore 9.500 v5 Menu Bootloader 5.5128 32MB available 5.1MB BeNeLux
TomTom One N14644 Canada 310 - Navcore 9.510 Bootloader 5.5011
TomTom on PDA iPAQ 2210 - HAiCOM HI-305III GPS Receiver PCMCIA - Navcore 7.450 Still running some latest maps.
TomTom on iPhone 4 Google Maps