Un tal Mr A en maxconsole escribió:Talking Point: Non Existant PSP Downgrader... ?
The highly respected MaxConsole user known as 'Mr A' has let us know his thoughts on the rumoured WAB PSP downgrader and what it will take to actually make a firmware downgrader for the PSP . The editorial contains a few minor insults but most importantly 'Mr A' backs himself up with technical information as we have all come to expect from him. Let's just get straight that this is HIS view and not written by MaxConsole staff!
Recently we have all been exposed to a large amount of hype and rumors relating to attempts to downgrade PSP's firmware for the purpose of using homebrew software. Two groups in particular, WAB and PSP-DEV have been claiming that they have a downgrader working but as yet all we have seen from either of these groups are a bunch of faked videos - no actual information or anything else which might suggest that they actually do have something working.
I have quite a bit of experience with reverse engineering etc and have personally examined the PSP firmware upgrade procedure by decrypting the updater executable and accompanying data file so I know how it all works. If either WAB or PSP-DEV had the skills to do this then they would probably never have claimed that they could downgrade the firmware since they would know exactly what is involved and that its not possible through software alone. I will try to explain how this all works without getting too technical..
As you know, the PSP upgrades come in the form of EBOOT.PBP archive files. The archives contain the encrypted upgrade executable (DATA.PSP), the encrypted data file (DATA.PSAR) and some other information such as the firmware version which is contained in the PARAM.SFO file. The PARAM.SFO file has been the focus of many downgrade attempts, but all these attempts have been in vain. While the PSP OS does indeed use this file to get the firmware version which will be upgraded to, even if you can bypass this first check and actually get a updater running (say 1.50 updater on 1.52 system) you will still not be able to downgrade.
This is because there is yet another check inside the update executable. The version information for the firmware which will be updated to is stored alongwith the rest of the upgrade data in the DATA.PSAR file. Once you start the upgrade the version information from the DATA.PSAR file is compared with the version of the firmware your PSP is currently running. If your PSP is running a more recent version than is contained in the DATA.PSAR file then you will receive an error.
Currently it is not possible for us to encrypt our own DATA.PSAR files or executable files. So we cannot simply edit the version information in the PSAR and we cannot simply patch out the check in the updater executable. I bet now some of you are thinking why dont you just change the firmware on your PSP so its reported as 1.00, then the upgrade will work!. In order to change the firmware version you will need to be able to execute unsigned code, if this was possible then a downgrade might not even be needed at all.
I dont see a working downgrade method appearing any time soon, especially with everybody going about it the wrong way! WAB dont seem to know what they are doing and they probably think that since you guys dont know either they can feed you crap. I just hope after reading this you are a bit more educated on the subject and now the lies they feed wont stick or continue giving people false hope for something which will most probably never come (at least not from these kids ala WAB).
jarponero escribió:Wenas a todos, este es mi primer post, aunque llevo ya un tiempo leyendo.
Igual soy un poco paranoico... pero a mi todo esto me huele a estrategia magistral de Sony...
1. Saca las consolas facilmente pirateables, nos ponen el carametilo en la boca, y todos a comprar consolas como churros...
2. Actualizan el Firmware y ala... pirateria a tomar por culo, pero seguimos comprando consolas con la ilusión de que pronto se volverá a hackear...
3. Mientras tanto, todos los que tenemos PSP, enga a comprar originales, para olvidar las penas...
Yo creo que el tema del pirateo es un poco tira y afloja... a Sony le interesa que haya, porque eso hace que venda mas aparatos, pero tampoco puede abrir el grifo del todo porque no venderia juegos...
Así que paciencia, que tarde o temprano caerá como todas han caido.
Saludos!
javi_xavi escribió:Por cierto ahora que recuerdo el dia 15 sale el winning 9 entonces si los del 1.50 pueden jugar aun nos daran mas envidia....entonces si que ya
javi_xavi escribió:Por cierto ahora que recuerdo el dia 15 sale el winning 9 entonces si los del 1.50 pueden jugar aun nos daran mas envidia....entonces si que ya
javi_xavi escribió:Por cierto ahora que recuerdo el dia 15 sale el winning 9 entonces si los del 1.50 pueden jugar aun nos daran mas envidia....entonces si que ya
pecheta escribió:Yoshi responde a Mr-A
En verdad k kiere decir?pk los k no tenemos mucha idea de ingles no entendemos ni papa. Eso es k estan cerca o k no? Decidme alg pronto k me desesperooo!
cambios escribió:No se por que me da que lo de la actulizacion sigue estando crudo.
Teniente Dan escribió:cual es el fake de la noche???
Gremio escribió:Que yo soy en realidad Christina Aguilera.
Gremio escribió:
Que yo soy en realidad Christina Aguilera.
Teniente Dan escribió:cual es el fake de la noche???
Pikoro escribió: Written by Pikoro
Tuesday, 13 September 2005
Well well well.
Just got a link in my email this morning.
File I received contained the following:
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|| Official WAB and PSP DEV Downgrader v0.9 for v1.5x & v2.00 ||
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|| (requires 1 MS) ||
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|| Take the file EBOOT.PBP hacked and put it in your ||
|| PSP->GAME->UPDATE folder. ||
|| Click X & the update will start. ||
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|| Yoshihiro & PSP DEV ||
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|| PS : When you use the source code from another dev add the name ||
|| in you nfo it's free .because now the psp scene sucks the credit ||
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|| GREETINGS ||
|| ========= ||
|| ||
|| - NHD for PVNC and Wi-Fi code ||
|| - AloneTrio, PaWsTick, CybBlade for support ||
|| - ps2 dev for great SDK ||
|| - And all PSP scene ||
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As soon as I try it out, I'll update this article.
Link will come if I don't brick my PSP.
Cheers
OJAZOS escribió:Tienes exactamente las mismas preguntas q yo sexus6. Yo ya no tengo paciencia y me he pillado la psp 1.5 japonesa. No veo q a corto plazo vaya a salir el downgrade. Un saludo