Update: It seems that some of the members here mistook my excitement as a prelude to a downgrader announcement which would happen in the future. Just so that none of the readers get a wrong idea, I will clear a few things out:
This does not mean that there will be a software downgrader for the TA-082 PSPs anytime soon, or even if there will be one ever. Until now, all of us thought that the downgrading failure was something to do with the 1.50 IPL; that it had been blocked on the newer TA-082 motherboards. However, reading a lot of good material from the accomplished hardware hackers has put me in doubt. Rather than trying to translate it into 'noob'-speak, and mis-translating it in the process, I'll first quote some an important observation by 0okm in a thread in the PS2DEV forums.
"i use Hardware Downgrader make it to FW1.00
and try use FW1.50 EBOOT.PBP to update it but not success
the error same as software Downgrader :P
1007 with FW1.00 or FW2.00+1.00index.dat can't run 1.50 update EBOOT.PBP !!
so the problem is NOT on the IPL !!"
Now, in simpler words, it means that he downgraded a TA-082 PSP to firmware 1.0; using his hardware downgrader of course. Then, trying to run the 1.50 update gave him the same error which you would get when trying the 2.0 -> 1.5 MPH downgrader. This simply proves the fact that it isn't JUST the IPL which is blocking/getting blocked here.
Normally, flashing 1.0 firmware onto your PSP would also flash the 1.0 IPL, which should theoretically allow you to update to 1.5. But here, that is not the case. This does prove the fact that Sony have done a lot of hard work in trying to block firmware 1.5 on the newer motherboards. Obviously, the part about using a 1.0 update doesn't come into the picture because we don't even have a 1.0 update eboot.
It has been verified by 0okm that the new motherboards can support all firmwares including and upwards of 1.51, which leaves out 1.0 and 1.5. Although you might wonder why they still support FW 1.51 and others, you should know that the first TA-082s were sighted in Asia (Hong Kong and Singapore to be specific) and were using FW 1.51 and above.
Nonetheless, this doesn't undermine the importance of this accomplishment. Even though we've covered 0okm's Multi Firmware Module before, I'll do a quick recap here. I can safely assume that this hack was done by 0okm primarily to let himself run any firmware on any PSP, without being restricted by the limits of software.
For a few months now, we've heard news about this hack. And it wouldn't be wrong to call it a modchip. The main advantage here again is the ability to manually flash any PSP with external hardware, and onto a separate storage chip. Now compare this with the Undiluted Platinum chip which is currently being sold commercially and you can see the similarities. I haven't been able to talk personally with 0okm to clear a few doubts, so I can't speak on anything apart from what I've read in the public forums.
But it's known that the TA-082 chip uses different voltages when compared to the earlier motherboards. The fact that 0okm has been able to apply his Multi Firmware hack on this newer model means that he has a few things already sorted out. Obviously, this doesn't prove that you will be able to downgrade your TA-082 PSPs to 1.5 any time soon. It's still a grey area as to how the chip is actually blocking the 1.50 update, and until someone can solve that problem, we can't hope for a downgrader, whether hardware-based or software-based.
What we can surely hope for, is that 0okm can continue his research on these 'cursed' motherboards, so that their owners can join us soon. Now onto my original post.
Parece que por ahora de downgrader nada
. Aunque no perdamos la esperanza, este tío está currando bastante con estas placas.