A homebrew enabled PlayStation 3 console. As of now that mostly means having a custom firmware installed. Obtaining and installing such a software is out of the scope of this document. Sorry, but you're on your own for that one.
At least one ScummVM supported game. The list of compatible games can be seen here: http://www.scummvm.org/compatibility/ The page http://wiki.scummvm.org/index.php/Where ... _the_games references some places where those games can be bought. Demonstration versions for most of the supported games are downloadable on http://scummvm.org/demos/
An USB drive.
From a computer, download the installable package of the PS3 port from ScummVM's main site. It should be a .pkg file. Copy it to an USB drive. After having plugged the USB drive to you PS3, the installation package should appear in the XMB under the "Games > Install Package" menu. Installing it copies ScummVM and its dependencies to your PS3's hard drive. It also adds the "Games > PlayStation 3 > ScummVM" XMB entry which is to be used to launch ScummVM.
Configuring and playing games
The user manual describes how to add games to ScummVM and launch them : http://wiki.scummvm.org/index.php/User_Manual
PlayStation 3 Specifics
Games can be launched either from an USB drive or from the internal hard drive. The internal hard drive has better performance though. Savegames are wrote in the /hdd0/game/SCUM12000/saves folder.
Joypad button mapping
Left stick => Mouse
Cross => Left mouse button
Circle => Right mouse button
Triangle => Game menu (F5)
Square => Escape
Start => ScummVM's in global game menu
Select => Toggle virtual keyboard
L1 => AGI predictive input dialog
Unauthorized distribution of an installable package with non freeware games included is a violation of the copyright law and is as such forbidden.
Building from source
This port of ScummVM to the PS3 is based on SDL. It uses the open source SDK PSL1GHT.
The dependencies needed to build it are :
The toolchain from https://github.com/ps3dev/ps3toolchain
SDL from https://github.com/zeldin/SDL_PSL1GHT
ScummVM from https://github.com/scummvm/scummvm
Once all the dependencies are correctly setup, an installable package can be obtained from source by issuing the following command :
./configure --host=ps3 && make ps3pkg