Here I will try to explain firmware stucture (in example I using EMTEC Movie Cube Q800 fw)
In package with official fw downloaded from Emtec homepage we can find these files:
arial.ttf
crc32.txt
install.flash.img
install_a
logo_pal.bmp
video_firmware.bin
arial.ttf
Truetype font used probably only in installation process.
crc32.txt
Simple - crc32 control sum for three files:
12f7d278 install.flash.img
129acb84 video_firmware.bin
8974c663 arial.ttf
install.flash.img
File install.flash.img contain 3 parts:
Header
Offset: 0x00
Length: 0x80
No useful information i found in this part (probably here are the offsets and sizes of other parts)
LZMA compressed kernel image which will be burned in /dev/mtdblock/0
Offset: 0x80
Length: variable
At the beginning of this part you can find 0x5D000080 LZMA signature
Squashfs filesystem of ROOT directory
Offset: variable
Length: variable
To find beginning of this part you need to find bytecode "hsqs" (0x68737173) which is little endian squashfs signature
install_a
ELF executable designed to burn firmware into box
logo_pal.bmp
Boot logo. More about changing boot logo you can find here
video_firmware.bin
Unknown for now (for me?)
Question ?
Hi How I unpack install.flash.img
to try build a CustomFirmware
http://minimodding.com/tiki-index.php?page=CustomFirmware
and build img again
