BDEMU.BIN is a "payload" (an active program in memory) based on the original PSGroove payload to allow access to the PS3 Syscall36.
The System_Call_36 is used to redirect /app_home/ to launch a mounted games without a disc in the drive, and redirect /dev_bdvd/ path to mount DVD/BDMV folders to emulate a Blu-ray drive. The PS3 think the new path is a Blu-ray reader.
There is no more payload included in multiMAN since v1.16.00, because:
- Allowing the reading of Blu-ray movies not using the actual BD-disc can be considered as "DRM protection circumvention device" in some countries, the decision to use this feature is left to the final user.
- Depending on your jailbreak method (Dongle, or Custom Firmware), you may already have a Payload and BDEMU is not needed.
If your jailbreak method doesn't include a payload, you can enable the Blu-ray emulation and paths redirection by either installing BDEMU.bin back in multiMAN, or patching the PS3 in memory using a homebrew (Lv2 Patcher, by Kmeaw) after booting your console. Remember to launch Lv2 patcher before using multiMAN, as the console memory is cleared when the PS3 is switched off.
BDEMU is provided in two different installation packages: One for custom firmwares accepting unsigned packages like Kmeaw cfw, and a signed one for custom firmwares requiring installation of signed packages like Wutangrza cfw.
Alternatively, advanced users can also install it manually by using the FTP or the file manager: Browse to multiMAN /dev_hdd0/game/BLES80608/USRDIR/ and copy BDEMU.BIN into that folder.
On the May 12th 2011, a version 2 of BDEMU has been released with added support for Hermes Syscall8.
The unsigned package is now named BDEMU-341.pkg (use it for "Modified firmware" created with MFW Maker, with Kmeaw custom firmware or any firmware accepting installation of unsigned packages)
The signed package is now named BDEMU-355.pkg (use this one if you are using a firmware requiring signed packages, like GeoHot or Wutangrza cfw, or with any other firmware 3.55 accepting signed packages like Kmeaw cfw)
List of Custom Firmware without a native payload:
Kmeaw Custom Firmware 3.55
Wutangrza Custom Firmware 3.55
GeoHot Custom Firmware 3.55
Modified Firmware 3.41 (mfw, Not to confound with 3.41 jailbreak dongles or Hermes cfw3.41)
For these firmwares, you will need either BDEMU or Lv2 patcher to access the PS3's Blu-ray emulation functions.