the frame/rate on my tomtom is very good and the navigation is fluid... see the n70 tomtom navi on youtube too.

and the frame rate of 3d nav on n800 jerk.

navicore doesn't use all capacity of n800 or n800 isn't so good for gps navigation ?

Well, if it's a TT GO then it's got a 320x240 display, which is way easier to drive than the N800's 800x480 display.. there are 5 times as many pixels in the latter. But it could also be a question of how good/optimized the navicore software is. This is the 770 version I assume. (In any case one must realize that TT is possibly the top contender to compare with, it _is_ very smooth. Runs like hot butter on my 480x320 Palm T3. I checked out a built-in expensive-looking navigation system in a fancy car, and it was crude and jerky compared with TT.)

In any case it's also true that most GPS (at least the NMEA ones) updates just once per second, as was said already by jpj.

and there is no info of a navicore for n800

and no possibility to send any question to the navicore developper ..

how does the screen size is in millimeter ?

http://thoughtfix.blogspot.com/2007/...it-update.html

Size of N800 screen (I believe the 770 is the same): I measure it as 91x55 mm.

we can stand for the n800 navicore update and see if it's work fine , i think ThoughFix must test it

Total WAG (wild-assed guess) here: Frame rates in excess of the GPS packet rate could be simply a matter of interpolating the intermediate frames in the rendering system. But I don't own an all-in-one GPS unit so this is only speculation.

i'm confuse, i think i don't explain clearly the question

on N70 for example with tomtom
http://www.youtube.com/watch?v=LyGsHnro4Yg

there is no lack of image, gps nav is fluid and rapid

but on n800 from thoughtfix it 's slow

is it normal ?

any new video demonstration ?

I wrote to Navicore about N800 availability, it is due out early April now.