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Ok, I have news about this. I managed to get the SDG-810 to work properly on Tomtom 6.
As I mentioned before, the main problem with Tomtom was the painfully low access speed to the maps. When driving, my car´s position in the screen would always lag behind my real position (even though the voice directions were right), and the picture would advance in "bumps".
I found out 3 sollutions that complement each other:
1. I formated the SD card in FAT32 (it was in FAT16);
2. Then, I increased the size of the MicroSD card cache. I mean, the OS reads the data in the card in 16kbytes chunks by default, and I increased it to 256kbytes. I used Memaid to do so (menu "jump to"+"Tweaks"+"System tweaks"+"SD/MMC Transfer". I´m sure there are other methods to do it, but I used this one.
After these two operations Tomtom started to act normally! I used it in a 1400km trip and It worked pretty fine.
3. A few days ago, I discovered something new, which confirmed that the bottleneck was, in fact, not the SDG-810 itself, but the microSD card it is bundled with. I know this because I just bought a new 2gb Sandisk MicroSD card, and this one works much faster (reading and writing data) than the other one.
There is only one detail within Tomtom software where I feel things could still be a little faster, which is when I choose a destination by entering the address´s name in the keyboard. It is still a bit slow to go through the database, but even so it is much faster than it was before.
Bottom line: with a decent microSD card, SDG-810 works fine with Tomtom.
I have no news about other GPS software because I can´t afford to buy them all, of course, but your opinions are always welcome.
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