[szczepan2]

This not works - you have a video tutorial?
Ok,I trying to get rockusb mode.
Greetings

And you have firmwares for my players?Or mp4 models looks like my mp4?
Images in the first post.

@EDIT
Rockusb works on Apacer,not D-Wave (D-Wave is a Rockchip player).Rockusb not works ond D-Wave!I trying other buttons well...
And how to backup firmware on Apacer?And you have the new firmware for my player?
Greetings

And you writing a Doom?O.o!You writing a rockbox or other aplications?I waiting for my new mp4,this is my surprise - I wanna to test .rpk games on this mp4.I can become a tester for more aplications and games.You are writing a linux and emulators?Mp4 is a new mini console xD.
Greetings
@EDIT2
You booted a rockchip original firmware (SDK)?Can I install this on Apacer?

@EDIT3
What is SDK?This is compiler?Can I write the new firmware for my player?What language you use to write games (C,C++,Delphi,Pascal...)?
MP4 compatibility with the C?My friend is programmer.I'm learning C language to write a programs to PsP and write Tibia to MP4.
Greetings