Cowon M2

[LibertyX]

Hi agan. A few days ago I posting this question, but today my topic was deleted or what? cant find/
SO where or how I can find, Is EXIST or will be develop Rockbox for Cowon M2?

I soon get M2, an really want to know. Coz really like Rockbox on my Sansa Clip Zip.

Any body here?

[btshftr]

Bump

Would love to see rockbox on the M2. It turned my D2 into ultimate win...

[saratoga]

A quick search suggests that you two are the second and third people to ever mention this player on the site, so I think you two know as much as anyone else does about it. 

[ds79]

When will be RockBox for Cowon M2?
only people hesitate to ask RokBoks at Cowon M2 is very necessary!

[Rockboxxxer]

love to see it rockboxed ! I am going to buy it as soon as i found some good review

[LibertyX]

So how are you? Soon will be a year when im using Cowon M2 without Rock Box, its very sad. Why you dont make some donation for your work, and give to us Rock box.... for our devices.

[[Saint]]

So how are you? Soon will be a year when im using Cowon M2 without Rock Box, its very sad. Why you dont make some donation for your work, and give to us Rock box.... for our devices.

You seem confused.

If you want this to happen, you need to be prepared to do it yourself. Every Rockbox port that exists, exists because someone who actually owns the device and is interested in it actually did the work and made it happen. Ports aren't created simply because one or more users want it to happen. It doesn't work like that at all.

If you want Rockbox for this device, do what the others in the past have done, and do the work necessary to make it happen. If this is too much work for you, or you perceive it as being too hard, then perhaps try thinking about what right you have to expect anyone else to do something you're not prepared to do yourself.

If you're not willing or capable of making this a reality, assume that no one else will, and move on.


[Saint]

[n158]

Some one named "emad" posted https://www.head-fi.org/threads/cowon-m2.729947/page-4 this circuit image for M2: . You can see that device DAC is WM8960G.

[pamaury]

Looking at the board, nothing looks like a CPU:

• toshiba: NAND or eMMC (haven't checked)
• PCF50633: power supply
• WM8960: audio codec
• 4708: FM tuner

Can you take a picture of the other side of the board by any chance?

[pamaury]

I had a look at the firmware upgrade available on Cowon's website. The FW firmware uses the standard "dual-CRC" telechips format (see https://www.rockbox.org/wiki/TelechipsInfo#A_34Dual_CRCs_34_firmware_format). Based on the string inside, it most likely is a TCC79x, in other words extremely similar to the D2. My wild guess is that the D2 port could rather easily be modified to handle the M2.

[n158]

Found image of other side on 4pda.ru. It appears that M2 CPU is Telechips TCC7901. Another chip is 512Mb (4M×4Bank×32) Mobile Synchronous DRAM EOREX EM48AM3284LBB -6FE.


The CPU specification might be this: TCC79xx_DataSheet_V1.03-090123.pdf, but not sure.

Some info about Toshiba NAND chip:
Part Number: THGBR2G8D4JBA01
Capacity: 32 GByte
DQ Interface: Legacy(SDR)
Page Size (Byte): 16K
CE Signal & Ready/Busy Signal: 2 & 2
Power Supply:
VCC(V): 2.7 to 3.6
VCCQ(V): 2.7 to 3.6, 1.7 to 1.95

While dealing with NAND, document NandDesignGuide.pdf might be useful.

[pamaury]

We usually don't support raw NAND because it requires FTL and no one wants to spend hundreds of hours doing so, but as long as there is a microsd slot it's okay (like the Cowon D2). However someone with the device needs to do the port and as far as I know, no developer of the project has the M2 or an interest in it.