Well, that's it. I can't do it. I measured resistance between pins of Rockchip and eKT8100. I started from ModeSel_L and I haven't found 0 resistance at any of rockchip pins. Then I did the same with ModeSel_H and it was the same. I only got half-resistant pins but there was at least 10 of them on the whole Rockchip and this is not what we are looking for.
Despite those 2 pins which I havent been able to localize, the lower pins you marked on your pic are almost inaccessible physically. You can see it on the picture I posted. The chip is size of 0.5cm X 0.5cm and pins are 5 times smaller than cable of my multimeter, which makes it even harder.
I have to give up, it's just impossible to figure this out without breaking anything in my player. Sorry I've wasted your time. Thanks for your effort anyway.
It's a shame that stupid keyboard stopped me from making my own firmware. Firmware with one working key is pointless.
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