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Rosalie's Mupen GUI (RMG) is a Nintendo 64 Emulator.

GitHub: https://github.com/Rosalie241/RMG

This page is for Rosalie's Mupen GUI, a standalone N64 emulator. This page is not for the Mupen64Plus-Next RetroArch core. For more information on RetroArch and the Mupen64Plus-Next RetroArch core, visit the RetroArch Page.

RMG Table of Contents

  1. Getting Started with RMG

  2. RMG Tips and Tricks

Getting Started with RMG

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RMG is a fairly straight-forward emulator to set up. If you are strictly playing Nintendo 64 ROMs, place your ROMs in Emulation/roms/n64. No additional setup is required. Read the Configuration section to learn more about RMG and its folder locations.

To launch your ROMs in game mode, use Steam ROM Manager and use one of the following parsers to play your N64 ROMs:

  • EmulationStation-DE
  • Nintendo 64 - RMG
  • Emulators

RMG Configuration

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  • Type of Emulator: Flatpak
  • Config Location: /home/deck/.var/app/com.github.Rosalie241.RMG
  • Nintendo 64 ROM Location: Emulation/roms/n64
    • No BIOS are required to play Nintendo 64 games
  • Nintendo 64DD ROM Location: Emulation/roms/n64dd
  • Nintendo 64DD BIOS Location: Emulation/bios
    • Nintendo 64DD BIOS:
      • 64DD_IPL_US.n64
      • 64DD_IPL_JP.n64
      • 64DD_IPL_DEV.n64
      • Note: These BIOS are only required if you are playing Nintendo 64DD games. These BIOS are not required for base Nintendo 64 games
  • Saves: Emulation/saves/RMG/saves
  • Save States: Emulation/saves/RMG/states
  • Storage Location: Emulation/storage/RMG

Note: ~/.var is an invisible folder by default. In Dolphin (file manager), click the hamburger menu in the top right, click Show Hidden Files to see these folders.

Works With

  • Steam ROM Manager
  • EmulationStation-DE

RMG Folder Locations

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These file locations apply regardless of where you chose to install EmuDeck (to your internal SSD, to your SD Card, or elsewhere). Some emulator configuration files will be located on the internal SSD as listed below.

$HOME refers to your home folder. If you are on a Steam Deck, this folder will be named /home/deck (you will likely not see deck in the file path when navigating using the file manager).

Paths beginning with Emulation/.. correspond to your EmuDeck install location. If you installed on an SD Card, your path may be /run/media/mmcblk0p1/Emulation/roms/... If you installed on your internal SSD, your path may be /home/deck/Emulation/roms/..

Note: Folders with a . (.var, .local, .config, etc.) at the beginning are hidden by default. In Dolphin (file manager), click the hamburger menu in the top right, click Show Hidden Files to see these folders.

$HOME/.var/app/com.github.Rosalie241.RMG

com.github.Rosalie241.RMG
├── cache
├── config
│   ├── kdeglobals
│   ├── pulse
│   │   └── cookie
│   ├── QtProject.conf
│   ├── RMG
│   │   ├── GLideN64.ini
│   │   ├── GLideN64.ini.bak
│   │   ├── mupen64plus.cfg
│   │   └── mupen64plus.cfg.bak
│   └── user-dirs.dirs
└── data
    └── RMG
        ├── Cheats-User
        └── Save
            ├── Game
            └── State

Emulation/storage/RMG

RMG
├── cache
├── HiResTextures
└── screenshots

How to Update RMG

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How to Update RMG

  • Update through Discover (Shopping bag icon)
  • Through the Update your Emulators & Tools section on the Manage Emulators page in the EmuDeck application

How to Launch RMG in Desktop Mode

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How to Launch RMG in Desktop Mode

  • Launch Rosalie's Mupen GUI from the Applications Launcher (Steam Deck icon in the bottom left of the taskbar)
  • Launch the script from Emulation/tools/launchers, rosaliesmupengui.sh
  • Launch the emulator from Steam after adding it via the Emulators parser in Steam ROM Manager

RMG File Formats

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  • .bin
  • .n64
  • .ndd
  • .u1
  • .v64
  • .z64
  • .zip

RMG Hotkeys

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Hotkey RMG
Quick Menu Select + R3
Save State Select + R1
Load State Select + L1
Next Save State Slot Start + R1
Previous Save State Slot Start + L1
1x Speed/Regular Speed Select + L2
2x Speed/Fast Forward Select + R2
Pause/Play Select + A
Screenshot Select + B
Reset Emulation Select + L3
Stop Emulation Select + Start
Switch to Memory Pak Start + DPad Up
Remove Pak Start + Dpad Down
Limit FPS Start + DPad Left
Switch to Rumble Pak Start + DPad Right

Note:

RMG Tips and Tricks

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How to Configure Multiplayer

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EmuDeck configures multiplayer out of the box. You do not need to configure the controls. To set up multiplayer, you simply need to enable the additional ports.

Tutorial

  1. Open Rosalie's Mupen GUI
  2. Open the Input settings
  3. For each controller you are using for Player 2, 3, and 4, click the respective tab
    • You do not need to adjust any settings for Player 1
  4. Under Input Device
    • Player 2: Steam Virtual Gamepad 1
    • Player 3: Steam Virtual Gamepad 2
    • Player 4: Steam Virtual Gamepad 3
  5. Under Profile
    • Player 2: steamdeck2
    • Player 3: steamdeck3
    • Player 4: steamdeck4
  6. After you are finished enabling any additional players, click OK and you may open your game either directly as a shortcut in Steam or through EmulationStation-DE
  7. (Optional) You may need to re-arrange the controller order in Game Mode for your controllers to function as expected. See How to Re-Arrange the Controller Order to learn how

How to Install Custom Textures

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Preface

HTS & HTC are cache formats. PNG is the 'source' of the texture packs before it's converted to a cache file.

Before installing a texture pack, you will need to determine if it is HTC, HTS, or PNG. This can usually be confirmed by checking the file extension or reading the attached documentation. Follow the respective section below for installing texture packs.

Keep in Mind

  • This section specifically requires the GLideN64 plugin. GLideN64 is the default graphics plugin if you are using EmuDeck settings
  • Texture packs are placed in the various subfolders within Emulation/storage/RMG
    • This folder contains the following sub-folders:
      • cache
        • cache is for HTC and HTS texture packs
      • HiResTextures
        • HiResTextures is for PNG texture packs

Texture Pack Sources

This list is not exhaustive

How to Install Custom Textures

HTC
  1. Open the Emulation/storage/RMG/cache folder
  2. Place your texture pack file directly into this folder
  3. Open RMG
  4. Click Settings at the top, select Graphics
  5. Click the Texture enhancement tab
  6. Make sure Use file storage instead of memory cache is unchecked
    • This setting is unchecked by default
HTS
  1. Open the Emulation/storage/RMG/cache folder
  2. Place your texture pack file directly into this folder
  3. Open RMG
  4. Click Settings at the top, select Graphics
  5. Click the Texture enhancement tab
  6. Check Use file storage instead of memory cache
    • Note: To save this setting on a per game basis, you can open the graphics settings while in-game and it will save to the per-game profile
PNG

This section goes over enabling file storage instead of memory cache in RMG's settings. This is optional, but recommended.

  1. Open the Emulation/storage/RMG/HiResTextures folder
  2. Place your texture pack folder directly into this folder
  3. Open RMG
  4. Click Settings at the top, select Graphics
  5. Click the Texture enhancement tab
  6. Check Use file storage instead of memory cache
    • Note: To save this setting on a per game basis, you can open the graphics settings while in-game and it will save to the per-game profile

How to Configure VRU

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The VRU (Voice Recognition Unit) was a peripheral for the Nintendo 64 that allowed you to use a microphone in "Hey You, Pikachu!" and "Densha de Go! 64".

Since the Steam Deck comes with an internal built in microphone, you can use the Steam Deck's microphone to utilize VRU in Rosalie's Mupen GUI.

Note: Make sure Rosalie's Mupen GUI is up to date. VRU support was added in v0.4.2, on July 7th, 2023.

How to Set up VRU

  1. Open RMG
  2. Open the Input settings under the Settings tab at the top
  3. Click on Player 4
  4. Change the Input Device to Voice Recognition Unit
    • RMG VRU
  5. Click OK in the bottom right
  6. VRU is now enabled

How to Configure N64DD

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The Nintendo 64DD was a floppy disk drive peripheral for the Nintendo 64.

See https://en.wikipedia.org/wiki/64DD#Games for a full list of Nintendo 64DD games.

Nintendo 64DD requires region specific BIOS. Place the respective BIOS from the list below directly in Emulation/bios matching the region of your Nintendo 64DD game.

  • 64DD_IPL_US.n64
  • 64DD_IPL_JP.n64
  • 64DD_IPL_DEV.n64

Note:

  • The BIOS must be named exactly as above. BIOS with any deviations from the above will not work. Make sure you have the proper casing, characters, and spelling.
  • BIOS must be placed in Emulation/bios. If you create a sub-folder, the BIOS will not be picked up and Nintendo 64DD games will not work.

For the following games, place the Nintendo 64DD ROM in Emulation/roms/n64 or Emulation/roms/n64dd, no additional set-up is required. These games are plug and play.

To play your games directly through Rosalie's Mupen GUI, your ROMs must be placed in Emulation/roms/n64. To use Steam ROM Manager or EmulationStation-DE, your ROMs may be either in Emulation/roms/n64 or Emulation/roms/n64dd.

Either parse your Nintendo 64DD games through the Nintendo 64 - RMG parser in Steam ROM Manager or play them directly through EmulationStation-DE.

  • Mario Artist: Paint Studio
  • Doshin the Giant
  • Mario Artist: Talent Studio
  • SimCity 64
  • Japan Pro Golf Tour 64
  • Doshin the Giant: Tinkling Toddler Liberation Front! Assemble!
  • Mario Artist: Communication Kit
  • Mario Artist: Polygon Studio

Note: Mario Artist will boot but the mouse peripheral is not supported at this time.

For the F-Zero X Expansion Kit, follow the below steps

  1. Place your base Nintendo 64 F-Zero X ROM in Emulation/roms/n64 and the F-Zero X Expansion Kit N64DD ROM in Emulation/roms/n64dd
    • The regions for the base ROM and the expansion kit need to match. If you are using the Japanese F-Zero X Expansion Kit ROM, you need a Japanese F-Zero X ROM
  2. Right click F-Zero X, click Edit Game Settings
  3. Click the Core tab under the Game tab
  4. Check Override Core Settings
  5. Change the CPU Emulator to Cached Interpreter, close out of the settings menu
  6. Right click the base F-Zero X ROM, click Play Game With Disk and select the F-Zero X Expansion Kit N64DD ROM in Emulation/roms/n64dd

Optional: How to Add F-Zero X Expansion Kit directly to Steam

  1. Place your base Nintendo 64 F-Zero X ROM in Emulation/roms/n64 and the F-Zero X Expansion Kit N64DD ROM in Emulation/roms/n64dd
  2. Parse your base F-Zero X ROM through the Nintendo 64 - RMG parser in Steam ROM Manager
  3. In Desktop Mode, open Steam, select the F-Zero X ROM, click the Gear icon, click Properties
    • F-Zero X Expansion Kit 1
  4. Scroll to the end of the Launch Options box and add --disk "/path/to/F-Zero X Expansion Kit" (write the path with the quotes)
    • F-Zero X Expansion Kit 2

How to Use Cheats

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Mid-Game

  1. While in game, use the left Trackpad and select the Cheats icon
    • Steam Input profiles for Nintendo 64 ROMs and EmulationStation-DE are enabled by default. However, if you do not see the Trackpad menu, see How to Select a Steam Input Profile
  2. Select which cheats you would like to use

Emulator

  1. Open Rosalie's Mupen GUI
  2. Right click a game
  3. Click Edit cheats
    • If you would like to add new cheats, it is recommended you do so in Desktop Mode

How to Roll Back RMG to an Older Version

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If you do not have access to a mouse and keyboard for the below section, use L2 to right click and R2 to left click. Alternatively, remote into your Steam Deck using one of the methods found in the FAQ, How do I remotely control my Steam Deck?.

  1. In Desktop Mode, open Konsole
  2. To see a list of prior versions of the emulator, type:
    • flatpak remote-info --log flathub com.github.Rosalie241.RMG
  3. If Konsole prompts you to select system or user, enter 2 to select user
  4. Konsole will list a list of previous versions for the flatpak. The important line for each version is the Commit: line. The Commit: line will have a long accompanying alphanumeric string (the “commit” code). Copy the string for the version you want to downgrade to.
    • Using Citra as an example:
      • How to Roll Back Flatpaks: 1
  5. To downgrade to the version you want:
    • flatpak update --commit=put_commit_code_here com.github.Rosalie241.RMG
    • Replace put_commit_code_here with the actual code you located in Step 2.
      • Using Citra as an example:
        • How to Roll Back Flatpaks: 2

If the above steps did not work and you are getting an error message along the lines of Flatpak not installed, your Flatpak is likely installed at the system level instead. Select one of the below solutions:

Solution 1: Open the EmuDeck application, click the Manage Emulators page, select the emulator in question, and click Reinstall / Update.

Solution 2: Add sudo in front of the commands written in Step 2 and Step 5. In Step 2, write sudo flatpak remote-info --log flathub com.github.Rosalie241.RMG and in Step 5, write sudo flatpak update --commit=put_commit_code_here com.github.Rosalie241.RMG.

How to Configure Language Settings

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In-Game

Some games may not have language options. For a full list of which games have language options, click one of the below links.

  1. Launch a game that supports your preferred language
  2. Depending on the game:
    • Select your preferred language on the initial launch of the game
    • In the main menu of the game, open the Options menu and select your preferred language