Article: 4.21 DEX firmware available

**KiiDPoLo98** · 09-02-2012,09:15 AM

Hey I wanna ask you something. Although my ps2 cannot be modded it scph-90001 date code 1D. Um I wanted to ask you do you know how to get codebreaker to work on my ps2 and can you tell me what i need. I have lots of memorex dvd+r cds so i wanna burn the code breakerv10 to it please help me !

**Porfas** · 09-02-2012,09:31 AM

Hey guys,
i have a big question [a noob one to be honest]...
I have a PS3 with OFW 4.21 installed, can i install 4.21DEX and then downgrade to 3.55 OFW?! After that can i install CFW 3.55 ?! I saw with DEX you can downgrade but i didnt understand how far you can downgrade, or if it only lets you downgrade to DEX FW's... Thanks!

**Ramosxtreme1976** · 09-02-2012,09:37 AM

Just wondering whats going to come out of this. With all the fixed games out now and everyone is raging how great it is!!! (ME To!!!) Will anyone try to make a CFW out of this if possible. Hummmmm... I wonder.... Would it be even worth it????

**BahumatLord** · 09-02-2012,10:58 AM

Originally Posted by Porfas

Hey guys,
i have a big question [a noob one to be honest]...
I have a PS3 with OFW 4.21 installed, can i install 4.21DEX and then downgrade to 3.55 OFW?! After that can i install CFW 3.55 ?! I saw with DEX you can downgrade but i didnt understand how far you can downgrade, or if it only lets you downgrade to DEX FW's... Thanks!

First you would have to downgrade to 3.55 with a hardware flasher, then do the conversion to DEX. After you convert you can install the 4.21 DEX firmware. Only after you've done that can you downgrade at will and convert back and forth from CEX to DEX and back again

**WarBlade** · 09-02-2012,05:48 PM

Hello all
Just finished converting cex to dex. Using 4.21fw. Now I'm playing an original game, and it askes to download the update..I do and I get an error. I can play the game without the update. Do I have to convert the updates for dex?

**JOshISPoser** · 09-02-2012,07:38 PM

i think so. i'm pretty sure they've converted a lot of updates

**l_oliveira** · 09-03-2012,09:25 AM

DEX consoles don't necessarily need to play CEX disks. So instead of removing the downgrade capability, they can instead remove CEX public keys (keys needed to read and process eboots for booting contents) from the firmware, effectively killing any interest pirates might have in DEX consoles.

**evilOvum** · 09-03-2012,11:10 AM

is there any solution to downgrading from ofw 4.21 to 3.55 that isnt hardware related?ANY??

**BahumatLord** · 09-03-2012,11:20 AM

no

**BIade** · 09-03-2012,01:52 PM

DEX4.21
->Enable core-dump
->Start Game via Target Manager or USB-BD-EMU
->Create an intentional Crash
->Grab decrypted EBOOT from dump
->Encrypt, sign & package for 3.55
->profit?

Cheers
Blade

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