RS Psar Dumper
Preview Status
Discontinued Discontinued
PlayStation Portable (PSP)

RS Psar Dumper is a “derivated” from the original Psar Dumper homebrew for PSP (last version of which was released by HelldashX).
Its functions are the same of classical Psar Dumper (so to dump Firmware from an Official Update Eboot), but with extra features: this version has a user interface full of colors, more interactive and especially it has the new important function to make a dump of Firmware directly on PC, without using Memory Stick! Infact this Homebrew has a USBHostfs connection function with a PC, so the program can read an eboot directly from Hard Disk (that is a good profit because new Sony Update Eboots sizes exceed 20 MB!) and it can also dump the Firmware directly on PC, so Memory Stick is NEVER used during the process!

Note: since v3 this program does NOT violate any Sony Copyright!
If you use it under a 3.80 (or more) Firmware, the program try to get NATIVE support for decompress KL3E (to decompress reboot.bin) and the oldest 2LRZ (to decompress ⇐3.73 firmwares). KL4E in this case is decrypted using an import exported by UtilsForKernel function.

Procedure WITHOUT using USBHOSTFS:

  • Insert eboot.pbp to decompress in the root of Memory Stick.
  • Insert homebrew folder RSPsarDumper in the PSP directory: /PSP/GAME37x
  • Insert folder called RS in the root of MemroY Stick
  • Make sure from Recovery mode that kernel is 3.xx
  • Start the homebrew from PSP under the menù Game → Memory Stick


  • Insert eboot.pbp to decompress in the same folder where Usbhostfs.exe is
  • Insert homebrew folder RSPsarDumper in the PSP directory: /PSP/GAME37x
  • Insert folder called RS in the root of MemroY Stick
  • Make sure from Recovery mode that kernel is 3.xx
  • Start the homebrew from PSP under the menù Game → Memory Stick

In both the cases will be created a folder called DUMP in the same directory where the Eboot (to decompress) is.
When process will end, in DUMP folder you will can find Firmware files extracted from the Offical Updater Eboot chosen.

What is the effective profit?

  1. Well, first of all this homebrew does not require free space on Memory Stick (that can be full too!)
  2. You spare time because you do not need to copy files between PC and Memory Stick!
  3. Extracting and dumping process require a very smaller time!

An example? Look to this my little “experiment”:


  • 3.71 firmware dumping from the Official Update Eboot

Technical data:

  • Eboot of 22,5MB (biggest released from Sony!).
  • Memory Stick used: original Sony Memory Stick Pro Duo 2GB (that one released with the PSP D1 pack!).
  • Process used: the most “onerous”, so PSAR loading with extraction e decompression of the Firmware (SQUARE key in the homebrew)


  • “Classical” process executed on Memory Stick: about 90 seconds of waiting…
  • “New” process executed on PC Hard Disk through USBHOSTFS: about 25 seconds of waiting…

Conclusions: Using the new USBHOSTFS function you can gain more than one minute! And also I did not calculate the time needed to copy eboot file from PC to Memory Stick, time that with USBHOSTFS is void!

  • Added support for 4.05 Official Firmware
  • Fixed usbhostfs.prx that did not work in CF 4.01M33
  • My last public update for this homebrew.
  • Added the support for the 3.93 Firmware (thanks to Blaky!)
  • Now program will be English in every PSP, so italian.prx is been deleted.
  • Fixed a critical bug in the previous version of pspdecrypt.prx.
    In previous version if you signcheck a encrypted file you obtained a corrupted prx.
  • Added the support for complete KL4E/KL3E decryption (Thanks Robert Metz!)
  • Increased the 3.90 Firmware support, now it's complete at 100%!
  • Program will tell you what sort of decryption support you have.
  • Now RSPsar Dumper is ready to use, NO other file is required!
  • No copyright or licenses violation.
  • Increased the available buffer to allow the CORRECT extraction of the 3.90 Firmware from Official Updater Eboot.
  • Now the 3.90F Firmware can be extracted perfectly
  • Only X and O functions will work without problems, the SQUARE function (extract and decrypt of ALL files) works fine but ends with and error when search for reboot.bin!
  • Fixed all license violation of the release
  • Added source code to respect GPL license
  • Deleted HelldashX prxs that violated Sony Copyrights
  • Possibility to extract and decrypt files from the 3.80 Officiale Updater Eboot.
  • Added an exe file to make easier installing the homebrew on PSP with CF 3.80M33
  • Same features of classical PsarDumper (extraction of Firmware files from an Official Updater EbooT)
  • Menù full of colors and more interactive
  • Add a new function to exit from the homebrew without forcedly do something (using SELECT key).
  • Add a function to activate/disactivate USBHOSTFS connection.
  • If USBHOSTFS connection is acctivated, program will show an advise in the case where PSP is not connected to PC or Usbhostfs.exe is not running on PC.
  • If eboot is not found, PSP will show an error (and NOT will crash!).
  • Program has 2 language files: if PSP language is set on Italian, homebrew will load Italian interface, otherwise it will load English one.
  • Homebrew will read the nickname set in PSP.
  • If RS folder is not found, program will end without crash.
  • Add a usefull Windows Program to install easier the Homebrew on PSP.
  • To PspPet, C+D, Dark_Alex, M33 and all past PSAR Dumper programmers.
  • To Team M33 (and so Dark_Alex) to have released Psar Dumper source code.
  • To HelldashX for 3.80 Psar Dumper.
  • To Robert Metz for 3.80/3.90 Decryption.
  • To Blaky for 3.93 support and decryption.
  • To my girlfriend for her patience.