recently our friend mathieulh has released a video with a retail PS3 he QA flagged.

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of course, he won't share how to do it

but... its pretty easy :p

requirements:
grafs kernel, ps3dm-utils and linux_hv_scripts

to patch your DM you have to run dmpatch.sh (skip if you're on gitbrew fw)

read QA flag:

    

ps3dm_um /dev/ps3dmproxy read_eprom 0x48C0A

it should return 0xFF on retail ps3.
just set it to 0x00

write QA flag: <- on your own risk!

    

ps3dm_um /dev/ps3dmproxy write_eprom 0x48C0A 0x00



OR



ps3dm_um /dev/ps3dmproxy write_eprom 0x48C0A 0xFF

its a very mighty tool. you can also enable product mode and other things.
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thanks to user from psx-scene



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