Downgrade a PSP-1000 to 1.50​

Why this guide?
Because going so low from modern CFW is far from obvious: version.txt spoofing to 1.00 then "updating" won't work due to incompatibilities; Hellcat's Recovery Flasher also fails to extract and flash it, despite having a dedicated feature; the original Pandora PC tools, if you can find them anymore at all, don't really work on Windows 7 and newer...

Why 1.50?
Because It's Possible, maybe you want to relive the "good old days", or to scalp it on ebay: "ignorant collector's tax"!

Needed things

• PSP 01g (1000 series, phat) with CFW, LCFW, or HEN
• 4 GB or under memory stick (microSD converters OK)
• Rain's PSP Tool: https://gbatemp.net/download/psp-tool-1-00.36089/
• 1.50 updater: https://darthsternie.net/index.php/psp-firmwares/

What to do?
Well, if you are sufficiently familiar with operating a PSP, once you have those files it's mostly intuitive... except maybe for the first step

1. Insert a formatted Memory Stick, equal or lower to 4 GB
2. Copy the firmware to the root of the Memory Stick, renamed to UPDATE.PBP
3. Copy the homebrew to /PSP/GAME/PSP Tool/EBOOT.PBP
4. Run PSP Tool, select "Memory Stick Tools", "Create Magic Memory Stick", "1.50 update flasher (Original Pandora)"
5. Press the back button to close the credits, wait for the files to extract, install the Time Machine CIPL to the memory stick and assign it to the button of your choice, and flash your battery's serial number to FFFFFFFF (known as Pandora or Jigkick)
6. Remove all power sources, hold the button(s) you configured, insert the battery, and follow the highly complicated instructions
7. Factory reset your console from Settings>System
8. That's it!

Yes, you can flash directly any newer firmware - including 6.61 - from 1.50[/URL]![/LIST]

 

[Reploid]

wow so retro much nostalgia, not much sense

 

[CallmeBerto]

1.00 and 1.50 now that takes me back. I remember when 3.70 was the GOLDEN boy.

 

[emmanu888]

Holy crap Pandora Battery, this just bought back so many memories of me installing CFW's on my friend's PSP's

 

[Thirty3Three]

2006 called.


That's it. they just called

 

[timmy30274]

i have my psp3001 OFW660 then got the cfw 660 files placed in the UPDATE folder on my memory stick.

but if i do this, what will i gain? i just play games on my psp.

i dont know anything about taking machines apart and tinkering with the insides, so, all i do is download files, then place into the correct folder on my memory card then run it.

 

[Ryccardo]

i have my psp3001 [...] but if i do this, what will i gain?

Nothing since, as the title clearly says, this is for PSP-1000s

(If you could actually install 1.50, it would brick... but you won't be able to run the original Pandora flasher in the first place due to 3000s not supporting CIPL)

 

[subcon959]

The only problem I see is that the chances of there being many compatible batteries still in working order must be pretty low.

 

[Casey-Strange]

404 links

 

[Ryccardo]

404 links

Thanks for the report, Darthsternie moved his site to darthsternie.net - but I don't have a copy of Rain's MMS Maker 1.50 anymore...

 

[Casey-Strange]

I found one. It's kind of useless other than giving your memory stick a good format as I don't think the current firmware has the same vulnerabilities. Could be using it wrong or using the wrong versions. I ddidn't see anything in there about picking a firmware or the timemachine thing. It just came with the magic memory stick maker.

 

[martravi]

I found a copy of Rain's PSP Tool used in the tutorial and uploaded it on GBATemp, since the link above is dead.
https://gbatemp.net/download/psp-tool-1-00.36089/

 

[xX-JMO-Xx]

Wow thanks dude keep sharing

 

[Calyptor]

Man jailbreaking my psp was my first "hack"....info wasnt so readily available back then (fuck you and your old age jokes). I felt so badass when i managed to open the psp battery and make my own pandora battery ahhhh good times..... sec i need to take my detures out of the glass

 

[Dudebloke]

it says not enough reserved space for ipl on a 2gb card.

 

[raxadian]

While interesting such a low firmware is not compatible with DLC. Anyone nowadays won't pay extra for such a low firmware. There are no advantages at all of being in 1.50.

 

[UnlockerPT]

does this work with recent firmwares? the goal is to go from 6.61 to 3.52
Thanks

 

[sudeki300]

does this work with recent firmwares? the goal is to go from 6.61 to 3.52
Thanks

no firmware can block a pandora battery

 

[UnlockerPT]

no firmware can block a pandora battery

in other words: i can go to 1.50 with this tutorial and upgrade to 3.52 a 100x psp, right?
or maybe go directly to 3.52?

 

[sudeki300]

in other words: i can go to 1.50 with this tutorial and upgrade to 3.52 a 100x psp, right?
or maybe go directly to 3.52?

should be able to go up and down to any firmware version with pandora battery and magic memory stick