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CodeZombie/gist:db01684d349159f1391edb7bc37720fb

Created September 28, 2026 02:13
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GA36-MB extract FEX
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gistfile1.md

How to extract the .fex file from the SD card dump of a GA36-MB firmware.

  1. Install bin2fex via sunxi-tools: https://linux-sunxi.org/Sunxi-tools
  2. Find the offset of script.bin: grep -obUaP "product\x00" sdcard.img | awk -F: '$1>20000000 && $1<20400000'
  3. That will give you some offsets. Try them in reverse order, subtracting 16.
  4. dd if=sdcard.img of=script.bin bs=1 skip=<the offset you just found - 16> count=131072 status=progress
  5. Attempt to convert it: bin2fex script.bin > hardware.fex
  6. If it gives you an error, try the other offset(s) you found.

NOTE: script.bin will exist in the first 128mb of the sdcard, so you can cut that out first before step 2 if you want to save time.

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