Originally Posted by yifanlu
Uboot is on the mmc along with the kernel, serial/Mac address, and root partition. They can all be flashed from within Uboot and USB download mode.
I don't have a KTouch or KindleNonTouch which might be different, but in this old Kindle3 post https://www.mobileread.com/forums/sho...7&postcount=10
You can see that the first partition on my Kindle3 starts at block 7688 of the mmc.
Inspecting the blocks prior to the first partition with a hex editor also showed interesting pieces of information, including what appears to be the bootloader.
00012F20 U-BOOT 1.3.0-rc3-lab126 [Boot Loader Id]
00040C00 B0A8XXXXXXXXXXXX [Serial Number]
00040C58 28EF01XXXXXX [MAC Address]
00040C64 A0036XXXXXXXX [PCB ID]
00040C80 OH40TWXXXXXXXXXXXXXX [Manufacturer Code]
00041040 Linux-2.6.26-rt-lab126 [Kernel Id]