Most of the players have an Actions ATJ2085 CPU chip
http://www.actions.com.cn/en/product.aspx?id=10 and can indeed play OGG
files (though their website doesn't say this)
I'd say that this CPU/microcontroller is the most limiting factor to
get Rockbox on these players: Rockbox is only built for and running
on 32 bit cpu cores, so this Z80 8/16?
Yes. 8data; 16address; Port mapped IO
Is there even a gcc-fork or other free and good compiler for it?
No, but the z88dk.org guys offered to make any changes required to
their devkit to support the device.
Also, the limited amount of RAM might be a bit tricky to deal with.
20K if the s1mp3 discoveries are accurate
Does it really play/decode the music with this CPU?
No, it has a DSP in the all-in-one chip ...the chip also contains
USB, Keyboard (via GPIO lines) and LCD.
Do you happen to know at what speed it runs?
20MHz if memory serves me correctly
So, it will require a few dedicated and skilled hackers with this
hardware to make a Rockbox port reality.
"wiRe" would be a good person to work with: s1mp3.de
These are just my opinions of course.
They're pretty much spot-on.
BC
