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Brand new slim downgrade

Discussion in 'Sony PSP - Mod and firmware discussion' started by dansage, Feb 10, 2008.

  1. dansage

    dansage Regular member

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    Hi all,

    Am going to buy a new slim psp today, and before I do I just wanted to confirm that you can install custom firmware on these.

    I know i need to use the pandora method and i have another psp running custom firmware to use for this.

    The question really is are there any problems with downgrading these slim psp's? and can any firmware be downgraded?

    Thanks
     
  2. acidy

    acidy Regular member

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    You cannot downgrade a PSP slim to 1.50 >_<

    But you can directly install a custom firmware on it using the universal unbricker hack and well, there aren't any problems if you do it correctly ^_^
    *3.60m33 is the lowest custom firmware you can go on a PSP slim* ^_^
     
    Last edited: Feb 10, 2008
  3. dansage

    dansage Regular member

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    Thanks for the reply,

    this is where i am confused. Do i use the universal unbricker, or the pandora method?

    I understand you cant downgrade to 1.5, but do the custom firmwares (3.6+) have exactly the same content as the older psp's custom firmwares?

    ta
     
  4. bu22ard

    bu22ard Regular member

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    the universal unbricker is effectively a re-coded pandora to work on slims and fats - this is what you need

    each firmware release from sony (and hence cfw) has the features of previous fw but usually with more added

    3.90m33 is the latest cfw
     
  5. dansage

    dansage Regular member

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    Superb thanks,

    I am struggling to find the correct guide. There are so many! any help?

    Does the fat psp fit into a slim? i ask because i have 2 spares for the old style psp.
     
  6. dansage

    dansage Regular member

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  7. bu22ard

    bu22ard Regular member

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    yes, the fat battery will fit in the slim for the purpose of using Pandora
     
  8. dansage

    dansage Regular member

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    thanks for that,

    if this guide is correct, it will install 3.71 m33-2, to upgrade to the newest (3.90 i think) do i need to install all the others inbetween, or can i just load up 3.90 m33?

    thanks again for all your help
     
  9. bu22ard

    bu22ard Regular member

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    as long as you are at 3.52 m33-3 or above you should be able to avoid the incremental updates

    README from 3.90m33:
    ____________________________________
    3.90 M33
    --------

    Requeriments:

    - Installation requires a PSP with 3.52 M33-3 or higher.
     
  10. dansage

    dansage Regular member

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    superb, thanks for that.

    Am now off to buy a shiney new slim, I will try all this later, (am downloading files now) I will keep you posted.

    Just checking, but can someone confirm the link i posted above is the correct guide to use.

    thanks
     
  11. PSPgamen

    PSPgamen Regular member

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    Hmmm... Btter for you is this one

    because this will install cfw to your psp with a psp homebrew enabled at the pandora battery part.
     
  12. dansage

    dansage Regular member

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    i thought this guide was for slim psp's already with custom fware installed? mine hasnt. its official sony.
     
  13. dansage

    dansage Regular member

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    Ok, so i have created the mem card and the battery from my other cfw fat psp.

    Anybody know what to do now? i have turned the slim psp on with the ac cord in only, then put the card and batt in, but i cannot run them33 3.71 update ver 1.50.

    what am i doing wrong?

    thanks
     
  14. acidy

    acidy Regular member

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    You must put the "Magic memory stick" and the battery without the AC adapter inserted in the PSP :)

    EDIT : First, put the "Magic memory stick" and then put the "Pandora battery" :)
     
    Last edited: Feb 10, 2008
  15. dansage

    dansage Regular member

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    the green light comes on but nothing else happens
     
  16. acidy

    acidy Regular member

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    Well, which means you've made the "Pandora battery" properly but not the "Magic memory stick" >_<

    Try using THIS guide to make your magic memory stick :)
     
  17. dansage

    dansage Regular member

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    ill try it. I downloaded the 2 files from the guide (about 90m each) and it took a while to load onto the card. Do i load it onto the card in the slim or fat psp? or does it make no difference?

    Thanks
     
  18. PSPgamen

    PSPgamen Regular member

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    You need to write the necessary files to the Mem Stick wich you want to hack your PSP. Preferable beetween 256 Mb-2 giga bytes. The others ms may not work.
     
  19. dansage

    dansage Regular member

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    ah ok. I only have a 4gb stick. Will this be ok?
     
  20. PSPgamen

    PSPgamen Regular member

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    You need to run from your PSP only despertar del cementerio as it is said there.You don't need to copy the files and the folders there.
     

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