Fatmsmod

From PSPWiki

Someone please extend

Fatmsmod.prx is the memory stick driver of the firmware. But Sony keeps changing it. Since 3.80, Sony has heavily optimized the fatmsmod.prx file. Due to this, slow-downs with memory sticks and their Sony NP9660 has been reported. However, this patch flashes the same file from 3.71, where no problems have been reported. The best one was the one in firmware 3.71, becuase after that, Sony changed it so that ISO/CSO's worked very slowly. So Dark_AleX created a patch for some M33 Firmware including 3.80 and 3.90 and 5.00 to install this fatmsmod for that firmware which makes everything fast. But, when using 3.71 fatmsmod, newer sticks (for example 32 GB sticks-not released yet) may not be supported. It's reported that 16 GB memory sticks work fine with the patch.

Installing 3.71 Fatmsmod

Requirements

• Phat/Slim PSP
• Version 3.80 M33/3.90 M33/5.00 M33
• M33 PSARDumper; Download: [1]
• 3.71 Fatmsmod Patch: For 3.80/3.90 V2, For 5.00
• 3.71 Update file: Download: [2]

Installation

• Since 3.80, Sony has heavily optimized the fatmsmod.prx file. Due to this, slow-downs with memory sticks and their Sony NP9660 has been reported. However, this patch flashes the same file from 3.71, where no problems have been reported. First, download the 3.71 Fatmsmod Patch files.
• Download the 3.71 Update file and rename it to EBOOT.PBP, (if not already named so) and place it in the root of your MS.
• Download M33 PSARDumper.
• Put both the Fatmsmod Patcher and M33 PSARDumper in PSP/GAME.
• Run M33 PSARdumper on the XMB. Press [] to fully decrypt and dump the 3.71 files.
• Afterwards, access the 'F0' folder at the root of your MS. Navigate to the 'kd' folder within the 'F0' folder, and locate the file 'fatmsmod.prx'. Move that file to the root of your MS.
• Run 3.71 Fatmsmod Patcher on the XMB, press X.
• If done successfully, the patch will be installed, and you should see improvements with your MS.

Note: Version 2 has the release already in it so don't worry. Note: If you cannot access your photo, music, or videos from the XMB, re-apply the patch with version 2. Warning: Ensure that the file you dump is either fully decrypted or encrypted with no signchecks. If you use a signchecked version with this patch, you will semi-brick your PSP. If you are not sure, follow the steps above.