Basic Usage:

MAME romset 0.78 is required for best
performance.
At first screen of MAME agreement when ask
to type OK, Move Left Stick - Left to Right to
signal "OK"
R3 will access the RetroArch Main Menu
R2 will access the MAME Menu options.
Select in game will add credits to the game.

Notes:

Core is based on v0.9.8 of RetroArch. (not
the current 0.9.9)
This is an Experimental Core for the PS3
from Libretro Code Re-depository. ( link)
This is an Unofficial release Please DO NOT
BUG official RetroArch developer of any
problems.
Custom RetroArch Main Menu Wood
Background Added in place of default
RetroArch menu.

Known Bugs:

When accessing MAME settings (R2 button)
settings will not save for next boot
Save / Load States will not work on a few
titles. (mainly Midway titles)

Credits:

RetroArch Developers: Squarepusher ,
Maister
Libretro Contributors: View the list of many
contributors here .
RetroXMB Developer: doobz
Artwork: Sandungas (PIC1) & STLcardsWS
(Custom Wood Main Menu)

Changelog:

The list of changes is too
exhaustive to be summarized, so
just a couple of highlights:
VBA Next performance
improvements - all games should
now play at fullspeed more or less
(even games like Final Fantasy
5/6)
Revised menu - should now
have the same functionality as all
other RetroArch versions
New 'Detect Core' function -
you no longer have to switch a
core and then select a ROM - with
this mode you can select a ROM
and RetroArch will look at the file
extension and start the core
associated to it. If there are
multiple cores that support this
file extension, then it will give you
a list of supported cores and you
can select which one you want to
use.
Much improved OpenGL driver -
the PS3 version of RetroArch
should now have the
lowest input/video latency out
of all RetroArch versions (with the
exception of maybe KMS/libdrm
on Linux).
Comes with MAME 2003 now.
Mortal Kombat 1/2/3/Ultimate
should all play at fullspeed with
the DCS Hack enabled.
Many more changes...

Cores currently supported:

Genesis Plus GX
SNES9x Next
VBA Next
NEStopia
FCEUmm
Mednafen PCE Fast
Mednafen NGP
Mednafen VB
Mednafen Wonderswan
MAME 2003 NEW!
Prboom
QuickNES
NX Engine (Cave Story)
Tyrquake
FInal Burn Alpha
Gambatte

Changelog:

- Added core info files – forgot to
add them in v1.0.0.0 which made
the Detect Core functionality not
show up

- Overlays should work now –
these will play a big role in future
versions

- Menu controls now honor the ‘O
Button Behavior’ from your PS3′S
System Settings

- (CURRENTLY BROKEN) – Analog
to D-pad mapping