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Rockchip 2818


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#1 sytzew

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Posted 14 December 2010 - 01:22 PM

Just ordered a tablet with the 'Rockchip 2818' chip, my question;

Any custom ROM development going on for this processor?

Rock 2818 ARM 11 600Mhz is what my ordered tablet features, running Android 2.1, possibility to upgrade/root to 2.2?

Thanks in advance!

#2 xaueious

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Posted 16 December 2010 - 10:46 AM

Do not flash the RK2808 ROMs.


RK2818 is not just a RK2808 with more RAM

#3 sytzew

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Posted 16 December 2010 - 11:47 AM

I didn't think it was a good idea either, their certainly not the same, know of anyone developing rom's for 2818?

#4 xaueious

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Posted 16 December 2010 - 12:33 PM

Not yet. Maybe you can start.

First figure our how the changed how system is packed.

Maybe they just reinforced the CRC check. naobsd/fun was the guy who got it all working way back then. He works on TCC8902 now though.

#5 fun_

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Posted 17 December 2010 - 08:21 PM

I'll get ONN Opad-N2 :(
then, I'll do something for it.

#6 MapleLeaf Tablets

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Posted 17 December 2010 - 09:20 PM

Anyone try it on a RK2818 with 256MB Ram unit ?

#7 sytzew

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Posted 18 December 2010 - 06:46 AM

I tried it off Applanet, didn't work for me, only showed a blue/white screen.

#8 xaueious

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Posted 18 December 2010 - 06:58 AM

Found a screenshot
Posted Image

620MHz ARM9 (ARM9 typically is Bogomips x2)
Not sure about the GPU yet
Free RAM at 200MB, so there is some sort of GPU/HDMI buffer? RK2808 showed the full 128MB.

From here: http://res.21cn.com/...html?from=gd_dg

#9 sytzew

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Posted 18 December 2010 - 07:07 AM

My device shows with 201mb of memory, no idea what it could be used for.

#10 xaueious

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Posted 18 December 2010 - 08:53 AM

I rounded.

The RAM available is why this thing seems so responsive.

#11 MapleLeaf Tablets

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Posted 18 December 2010 - 09:55 AM

sad about Angry Birds...

but thats AMAZING for the Available Ram !  Thanks X

#12 sytzew

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Posted 18 December 2010 - 01:11 PM

Who knows, maybe it's only my device; always worth trying to see if 'Angry Birds' will work for you :(

EDIT"

Anyone seen anything bout this tablet? It's called 'Point of view Mobii 7" tablet Gen II'?
Would it be a possibility to copy the ROM off this device and then access it through a unix system to unpack and change stuff? if so, how would I do it?

#13 fun_

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Posted 20 December 2010 - 01:33 AM

I verified CRC algorithm is not changed from RK2808. rkcrc is still usable for us:)

decrypted system.img should be able to dumped from live device.
I think update.img which contains dumped decrypted system.img can be flashed by official flash tool.

I don't have my RK2818 yet. anyone can confirm it?

#14 sytzew

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Posted 20 December 2010 - 04:51 AM

If you tell me how to do it, i wouldnt mind trying it on my tablet.

#15 fun_

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Posted 20 December 2010 - 05:10 AM

If you tell me how to do it, i wouldnt mind trying it on my tablet.


do you have official update image/tool for your tablet?
if "no", I don't recommend to do it... it may brick your tablet.

if "yes", then next question.
can you get root rights via adb shell? (no need to install superuser.apk. root shell is enough)
if "no", you need to modify boot partition (boot.img) or get root by temproot method to dump system partition.

#16 sytzew

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Posted 20 December 2010 - 05:41 AM

Isn't it possible to copy/backup the image off the device itself?

Z4root can temp root it, but that's as far as it'll go for now.

#17 fun_

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Posted 20 December 2010 - 06:09 AM

Isn't it possible to copy/backup the image off the device itself?


"dumping system.img from live device" is some kind of "making backup".
I'm happy if you answer my 1st question... or you said "no" above?

Z4root can temp root it, but that's as far as it'll go for now.


as I said, root shell is enough even if it is temporary. you can dump mtd partitions on it.

#18 sytzew

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Posted 20 December 2010 - 06:19 AM

Well then its a no, I dont have the official update image for the device, it's not provided on their website either.

#19 fun_

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Posted 20 December 2010 - 06:45 AM

Well then its a no, I dont have the official update image for the device, it's not provided on their website either.


you can make backup of all mtd partition via root shell. you can get flash tool from another RK2818 firmware.
but you can't make backup of RK28xxLoader(L).bin from device. I do NOT think RK28xxLoader(L).bin for another device will work on your device.

I want to know update.img with decrypted system.img can (or can not) be flashed by official tool.

--
I think you can try to make/flash custom ROM without official ROM/tool.

dump boot and system partition, modify them, reflash them via root shell or old flash tool for RK2808 which can flash specific mtd partition. but it may brick your device.

can you agree to brick your device?

#20 sytzew

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Posted 20 December 2010 - 07:21 AM


Well then its a no, I dont have the official update image for the device, it's not provided on their website either.


you can make backup of all mtd partition via root shell. you can get flash tool from another RK2818 firmware.
but you can't make backup of RK28xxLoader(L).bin from device. I do NOT think RK28xxLoader(L).bin for another device will work on your device.

I want to know update.img with decrypted system.img can (or can not) be flashed by official tool.

--
I think you can try to make/flash custom ROM without official ROM/tool.

dump boot and system partition, modify them, reflash them via root shell or old flash tool for RK2808 which can flash specific mtd partition. but it may brick your device.

can you agree to brick your device?


Once it's bricked i wont be able to reset it or anything to get it working again?