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FujiNet Go

FujiNet Go Desktop

RCA Studio II

RCA's first home console, with FujiNet on the cartridge slot.

FujiNet Go Studio II v0.4.0 Released November 2, 2026 RCA, 1977

Download and install Source code

Screenshots

GNOME

The FujiNet CONFIG client running on the console
The debugger's FujiNet tab: FujiBus traffic and the cartridge's mailbox
Both keypads, the console keys and gamepad mapping

KDE

The FujiNet CONFIG client running on the console
The debugger's FujiNet tab: FujiBus traffic and the cartridge's mailbox
Both keypads, the console keys and gamepad mapping

Windows

FujiNet CONFIG on the Studio II, on Windows
The debugger's FujiNet tab: FujiBus traffic and the cartridge's mailbox
Both keypads, with mapping and gamepads

Features

  • .st2 and .bin cartridges
  • Keypad window showing both keypads, remappable to keyboard and gamepad
  • Debugger with Prompt, CPU, Disassembly, Video, Sound & I/O, Breakpoints, Cart and FujiNet tabs
  • FujiNet CONFIG runs on a built-in stand-in BIOS, so nothing is needed to start
  • FujiNet web UI in your browser, or switch to an external FujiNet

BIOS ROMs

Optional

CONFIG and FujiNet apps run on a built-in 92-byte stand-in. Commercial games need the real BIOS.

FileWhat it isCRC32Needed
studio2.bin Full 2K BIOS (2 KB) A494B339 Optional
studio2-system.bin 1K system ROM (1 KB) D3DE048C Optional
84932.ic11, 84933.ic12, 85456.ic13, 85457.ic14 MAME studio2 set Optional

How to add them: Machine ▸ Import BIOS… takes either the single 2K image, the 1K system image, or MAME's four chips.

Download and install

FujiNet Go Studio II 0.4.0, released November 2, 2026. Release notes

Linux

Desktop
Package

Install with Flatpak (any distribution)

  1. Install Flatpak with your distribution's package manager if you don't have it yet.
  2. Add Flathub, which supplies the runtime, and the FujiNet Go repository: 
    flatpak remote-add --user --if-not-exists flathub \
    https://dl.flathub.org/repo/flathub.flatpakrepo
flatpak remote-add --user --if-not-exists fujinet-go \
    https://fujinetwifi.github.io/fujinet-go-desktop-flatpaks/fujinet-go.flatpakrepo
  3. Install the GNOME edition (or swap gnome for kde): 
    flatpak install --user fujinet-go online.fujinet.go.studio2.gnome

Windows

Installer Recommended

Windows 10 or 11, 64-bit. Installs for your user only and needs no administrator rights.

Download fujinet-go-studio2-0.4.0-windows-setup.exe

6.2 MB

  1. Run the downloaded file.
  2. If Windows SmartScreen says it protected your PC, choose More info, then Run anyway. The app isn't code-signed yet.
  3. Start FujiNet Go Studio II from the Start menu.

Portable zip

Nothing to install. Good for a USB stick or a locked-down PC.

Download fujinet-go-studio2-0.4.0-windows.zip

7.8 MB

  1. Right-click the zip, choose Extract All…, and pick a folder.
  2. Open the folder and run the .exe inside.

macOS

macOS app

macOS 13.3 or later. Pick the build for your Mac's chip.

Apple silicon fujinet-go-studio2-0.4.0-macos-arm64.zip · 5.7 MB Intel fujinet-go-studio2-0.4.0-macos-x86_64.zip · 5.7 MB
  1. Open the downloaded zip and drag FujiNet Go Studio II into Applications.
  2. The first time, Control-click the app and choose Open, then Open again. (On macOS 15 and later: try to open it, then go to System Settings ▸ Privacy & Security and choose Open Anyway.)
  3. Or clear the download quarantine in Terminal: 
    xattr -dr com.apple.quarantine "/Applications/FujiNet Go Studio II.app"
Every file in this release, with SHA-256 checksums
FileForSizeSHA-256
online.fujinet.go.studio2.gnome.flatpak Linux · GNOME · Flatpak bundle 5.0 MB cc4b4b16f6d424e20fc654231ec2621de151b184fd6d72a9e5156b286872e337
online.fujinet.go.studio2.kde.flatpak Linux · KDE · Flatpak bundle 4.8 MB 0712d5804bfe81d23af4ecf54e2cdcc14f34404f0d46b32f2c40ada9ce3539c5
fujinet-go-studio2-gnome-0.4.0-Linux.deb Linux · GNOME · .deb 5.1 MB 15c0760c6d2344d02b00eb6b7533baea215cd30f430215dac0a6cd926fe18c61
fujinet-go-studio2-kde-0.4.0-Linux.deb Linux · KDE · .deb 5.2 MB 6a68480f4fac071bc826decda6574d6258f31bc01acec282d26a00d982198865
fujinet-go-studio2-gnome-0.4.0-Linux.rpm Linux · GNOME · .rpm 4.4 MB fadb084a1e4c1af9947d3a703f6002ab0c19dc7da9e384f3edef28380306ad2f
fujinet-go-studio2-kde-0.4.0-Linux.rpm Linux · KDE · .rpm 4.4 MB 56e36fda66fd6af0e706b5e6b6466fc8ad72b54c35b5c4cf613b6a7e89f70913
fujinet-go-studio2-gnome-0.4.0-Linux.tar.gz Linux · GNOME · .tar.gz 5.1 MB f61b4b900e8d6f9b66ec28ff9b681a92efb893d996865253adf07b02810ee29a
fujinet-go-studio2-kde-0.4.0-Linux.tar.gz Linux · KDE · .tar.gz 5.2 MB 4eefcbef6d4a8e7f3cd360af1e5148fa4f992e1e96a1d8ad09499e1f27034e61
fujinet-go-studio2-0.4.0-windows-setup.exe Windows installer 6.2 MB 5b4c3f8dec9aa41ad85aca9ecbcbd38c9a93db195beb4259c20b225692dd4d34
fujinet-go-studio2-0.4.0-windows.zip Windows portable zip 7.8 MB 215909e9a96e14dbca60ac18d16db67f0ec9165b0fd8d497e9fdd87232378e60
fujinet-go-studio2-0.4.0-macos-arm64.zip macOS · Apple silicon 5.7 MB 2493b3821a4ac3f5f878a3146886db08680e4a83265b00304149d11ef70af96c
fujinet-go-studio2-0.4.0-macos-x86_64.zip macOS · Intel 5.7 MB d05eaa65b82f6989f948e528485f2925650269a89154ffe536c13fec5efbf038

Built on

FujiNet Go Studio II is free software (GPL-3.0). It stands on these projects:

  • MAME (studio2, cosmac, cdp1861, beep) BSD-3-Clause

    Machine, CPU, video and sound, rewritten in C. Curt Coder; Kevin Thacker; the MAME team

  • fujinet-firmware GPL-3.0-or-later

    The FujiNet itself, built into every app. Thomas Cherryhomes and the FujiNet contributors

  • Mbed TLS Apache-2.0

    TLS for FujiNet's network protocols. The Mbed TLS contributors

  • libssh, libsmb2, libnfs LGPL-2.1-or-later

    FujiNet's SSH, SMB and NFS protocols. Their respective authors

  • cJSON, expat MIT

    JSON and XML parsing in FujiNet. Dave Gamble; the Expat maintainers

  • SDL 3 Zlib

    Video, audio and gamepads. Sam Lantinga and the SDL contributors

  • GTK 4 and libadwaita LGPL-2.1-or-later

    The GNOME edition's interface. The GNOME project

  • Qt 6 LGPL-3.0-only

    The KDE edition's interface. The Qt Company and contributors

The full list of bundled code, versions and licences is in COMPLIANCE.md. Source code · All releases · Report a problem