random notes. these are not specific to CM7.
* boot.img/system.img format
my images are already packed/converted to proper format. boot.img is cpio+gz archive with Rockchip header and trailing CRC(like as pre-SDK2 ROM). system.img is ext3 fs image(like as SDK2 ROM).
if you want to make old format kernel.img/boot.img from SDK2 boot.img(kernel+ramdisk), please use "unpackbootimg -i" and "rkcrc -k" commands.
you can use old format kernel.img/boot.img with SDK2 bootloader/kernel.
if you want to make ext3 system.img, please make empty ext3 image, mount it, then extract cramfs/yaffs2/something system.img on it. you need to preserve permission, owner, group info.
you can use ext3 system.img on pre-SDK2 ROM with necessary modification to init.rc.
it just contain command for recovery. normally it's "wipe all" command. if you flashed it into misc partition, next boot will go into recovery, and "wipe all" will start automatically.
(it's not "must" thing for wipe. there is another way to wipe)
* very first logo on boot.
I think first logo is in kernel. it's same as tux(penguin) logo on Linux.
(I'm not sure on RK2918. but it's true on RK28x8)
* MTD partition layout
there are 2 info, one for kernel, one for flash tool. both need to be synced.
for kernel, there is CMDLINE: ... mtdparts=... in parameter file. you can change it with text editor.
for flash tool, there is offset/size info in header of update.img. it should be generated by AFPTool.exe with definitions in HWDEF file. there is no HWDEF for RK2918 ROM, but this way works for RK2818 ROM.
or, my rkafpack tool can set these values without HWDEF file. I confirmed it works for RK2918 ROM.
or, RKAndroidTool.exe can be used.
anyway, when you try complete new ROM (e.g. my CM7) first time, you should not change anything. please confirm procedure with working image at first, then verify what works, or not works. then you'll know what need to be modified/added for your tablet.
Edited by fun_, 29 November 2011 - 12:13 AM.