I could not answer short, so a spoiler: scratch_one-s_head:
SryMyBad Once I wrote "To alter in the programmer 538," it is logical to assume that the programmer is needed for this: D soldering skills too need, and no elementary chip soldering iron is not removed, you need a hair dryer for soldering / disassembly, and specials. an adapter for mounting it into the programmer (and such adapters terribly expensive) or thin hairs makeshift to solder it to socket. How much will it cost you to say I can not, all depends on the greed of some is such that their "service" is almost meaningless financially. It is necessary to refer to the sane spice.
I do not buy any Mio, nor any other regi, I have them repaired. In terms of reliability Mio is no better and no worse than others of the same class, all done in the same factories in China for different customers (brands), which are more or less involved in the design, some even only purchase, asking stick them titles and make special package. Problems with the batteries, and as a consequence of failure SD-card and software faults are the same for all regov batteries, with some nuances. Somehow, these batteries Mio though seemingly more impressive than most anonymous acc. without the name of the manufacturer, but bring them to repair entirely of dead acc. with corresponding consequences.
About "what happened", without going into the jungle, about the same as would happen if all the time to turn off PC just pulling the plug out of the socket - you're lucky a couple of times, and then still lose files on the screw. In regah acc. needed in the first place to switch off the ignition when the car, registration had to shut down cleanly, receiving power from the ACC. No normal acc. - will fail and the video files and settings, and software in the flash memory. She SD-Card - also in fact a microcomputer with its software, which can also run off, after which the card can not be restored. Plus life flash in them is not very big and they quickly "wear out".
Leon cars It is difficult to explain to the layman what is the difference and especially to repair regov Ambarelle compared with others, but can you believe it just seems to the user that there is time for Ambarell software for programming via USB, it is easier to them. In fact, in addition to this there is still a lot of problems, which decided to do considerably more complex than others, and as a rule simply is not profitable, so if zashilsya via USB - good, and if not, you can throw away. Working with the programmer - it is for you dancing with a tambourine, and a routine for repairers, and many times more efficient than using someone else's software, because no depending on whether the computer sees this registration via USB or not, you will find a suitable network elf, kindly provided by the manufacturer or not, etc. etc .. With the programmer, I always know that if there is a firmware update, if merged others, I can fill it without question.
A self-made modifications to the firmware and dopilivaniyami - a single song, it's for those who do nothing, with all due respect for their hard work. Well, there was a pair of enterprising programmers, well, they did something for something which models, and so what? From this Ambarella it has become more user-friendly? What it was once excavated and made long ago overgrown with moss and its regi already worked and it sat happily, and those enthusiastic fervor has dried up. On the other hand, in principle, with any other regami on any other mechanism Protsakh picking about the same - firmware thought, well, sit disassembles, vayay improvements))
Modification of firmware from the manufacturer - is also in no way depends on the processor, but only from the manufacturer. Just Historically, the leading developers regov primarily used the most advanced processors and their choice in the beginning was quite miserable and the leader was always Ambarella. Therefore, it turned out that all developers regov dopilivat dopilivat and software, often releasing the next version, and in particular this applies to the more expensive regov Ambarelle. Now and processors become dark, and the constant downward trend in prices due to strong competition and the desire faster to produce more and more new models lead to the fact that "licking" software to engage in no time, and if someone is releasing the next version of the software , more often just because of critical errors. And essno it does not depend on the type of processor, because the developers is absolutely no difference, they are equally well may change the software for any processor, in what would have made no reg.
Do not pretend to be an unconditional right, this is my IMHO :)