DeSmuME Manual for the Linux GTK+ port
NOTE: This refers to the 0.9.2 revision of desmume, and may or may not accurately reflect the current revision.
Quick Getting Started Guide
Due to the numerous different distributions and hardware platforms Linux runs on, desmume for Linux is only offered in source code form. This means you have to rely on packages available from your distribution or build it yourself. If you do not know how to do this, please refer to Installing DeSmuME from source on Linux.
Once you have desmume installed, you will have 3 different Linux ports to choose from: gtk+, glade, and a command line port. This manual is about the GTK+ port. You can start it by typing 'desmume' on the command line.
When you start the emulator for the first time, you probably just want to play a certain game. You can do this by going to 'File' in the menu, and selecting 'Open'. This will open up a file chooser, within which you can browse to the rom (nds file) that you wish to play. Once the game has finished loading (and this should only take a few seconds at most), you need to start the game. You can do so by choosing 'Emulation|Run' from the menu, or by clicking on the 'Run' button.
The rest of this manual will be spend on explaining all the other options in the menu.
File | Open
This option lets you browse to and selct a rom file to open in the emulator.
File | Save state to
Imagine you have gotten to a certian point in a game, and you need to do something else. The emulator let's you save the current state of the game, so that you can continue the game later at precisely the same point somewhere in the future. This option lets you choose a random name for your savestate file.
Please note that the use of SAVESTATES is discouraged, as these are likely to break between emulator versions. Instead use SAVE FILES. These are likely to survive between emulator versions. This means that you will have to use save points within the game. SAVE FILES are stored in .sav files.
File | Load state from
Once you have saved a game's position, or 'state', you can load it again with this option. This option works in tandem with 'Save state to', and lets you select any randomly named savestate file.
File | Save state
This option works fairly similair to the 'Save state to' option, altough it let's you save numbers instead of specifying a chosen name. Also, all the states saved via this option end up with a pre-determined name of 'game (rom) name'.dsx. So if the game is called MyGame, the first savefile will be called MyGame.ds0, the second one MyGame.ds1, etc.
File | Load state
This option let's you load the states that you saved via the 'File | Save state' option
File | Record movie to
This option lets you record the gameplay in TAS format, see http://tasvideos.org for details on TAS (tool-assisted speedruns).
File | Play movie from
This option lets you playback a pre-recorded TAS movie.
File | Stop movie
This options lets you stop recording a TAS movie.
File | Take a screenshot
This option lets you take a quick screenshot of the current display in the emulator windows. The image is in PNG format and is saved in current directory. Hotkey is Ctrl+S.
File | Quit
Selecting this option terminates the emulator.
Emulation | Run
After you have opened a rom file, you need to start (run) it. This menu option does that. Alternatively, you can press the 'Run' button.
Emulation | Pause
Choosing this option causes the emulation to 'freeze', or pause.
Emulation | Reset
Selecting this option resets the rom file you opened, and makes it start at the very beginning just as if you just opened and ran the rom.
Emulation | Enable Audio
This option lets you choose, by placing a checkmark, if you want to hear audio or not.
Emulation | Fake mic noise
This option lets you play a dummy or fake mic noise, even if there is no microphone attached.
Emulation | Frameskip
This option lets you select how many frames should not be displayed, in order to gain speed improvements. If you have speed problems, you could decide to skip (not display) one or more frames in order to improve the speed.
Emulation | Layers
This option lets you view the Layers one by one.
Emulation | Cheat
This option pulls down a drop-down menu, and presents the options list and search. Be aware though, that cheats are sort of half baked right now. If you are not having luck, wait for some news on an improved cheat system. Also, it is impossible yet to use "commercial" codes, such as Action Replay and Codebreaker, so what you'll have to do is manually search for, and alter the memory positions to your advantage. They are called 'raw' or 'internal' cheats. There's an excellent article in the wiki on Using Cheats in DeSmuMe . In post-0.9.2 development builds, there is also the support for Action Replay cheat codes.
Emulation | Cheat | Search
Choosing 'search' will let you search for cheats. Please refer to the article Using Cheats in DeSmuMe for further details on how to use the cheat mechanism in desmume.
Emulation | Cheat | List
Choosing 'list' will list all the currently known cheats. Please refer to the article Using Cheats in DeSmuMe for further details on how to use the cheat mechanism in desmume.
Config | Saves
This option lets you specify the save type of a particular game. The default is 'autodetect'. However, this is not fail-safe in all cases, so you might need to manually select one of the other savetypes.
Config | Rotation
This option lets you rotate the screens by a pre-determined value.
Config | Interpolation
This lets you set the interpolation to either 'Nearest' or 'Bilinear'.
Config | Gap
This option lets you select whether you want a 'gap' between the upper and lower screens.
Config | Edit Controls
This option lets you configure keyboard keys.
Here are the default key mappings (they may be subject to change):
Up arrow - Up Left arrow - Left Down arrow - Down Right arrow - Right x - A button z - B button s - X button a - Y button q - Left Trigger w - Right Trigger Enter - Start button Right Shift - Select button Backspace - Lid fold/unfold n - Frame advance Space - Pause/Unpause p - Load current state 1,2,3,4,5,6,7,8,9,0 - Select current state F1-F10 - Load relevant state Shift+F1-F10 - Save relevant state
Tools | IO Regs view
This option lets you view some of the the ARM7 and ARM9 I/O registers.
Help | About
This option displays the version you are using.