FujiNet Go Desktop

Atari 7800

The Atari 7800 ProSystem, with FujiNet CONFIG as its power-on program.

FujiNet Go Atari 7800 v0.5.0 Released November 2, 2026 Atari, 1986

Download and install Source code

Screenshots

FujiNet CONFIG is the 7800's power-on program

The debugger's MARIA tab: display list list and palettes

Preferences: console, BIOS, display and controllers

Preferences: TV system, BIOS, picture and controllers

The debugger's FujiNet tab: FujiBus traffic and the cartridge's link

Settings: TV system, BIOS, picture and controllers

Features

No BIOS needed; CONFIG is the power-on program
Cartridges .a78 and .bin, or a .zip or .7z holding one; the cartridge's own mapper engine runs everything
XG-1 light gun on the mouse, High Score Cart, and a Controllers window
Debugger: MAME console, MARIA, I/O, the cartridge and a FujiNet tab
FujiNet web UI in your browser, or switch to an external FujiNet

BIOS ROMs

Optional

Nothing is needed. A real BIOS adds the Atari boot screen; the High Score Cart ROM adds saved scores.

File	What it is	CRC32	Needed
7800.u7	NTSC BIOS (4 KB)	5D13730C	Optional
c300558-001a.u7	NTSC BIOS with Asteroids (16 KB)	A0E10EDF	Optional
c300558-001b.u7	PAL BIOS (16 KB)	D5B61170	Optional
highscre.bin	High Score Cart (4 KB)	9BE408D3	Optional

How to add them: Machine ▸ Import BIOS… matches files by size and CRC.

Download and install

FujiNet Go Atari 7800 0.5.0, released November 2, 2026. Release notes

Desktop

Distribution

Package

Install with Flatpak (any distribution)

Install Flatpak with your distribution's package manager if you don't have it yet.

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

Install the GNOME edition (or swap gnome for kde):

flatpak install --user fujinet-go online.fujinet.go.atari7800.gnome

Installer Recommended

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

Download fujinet-go-atari7800-0.5.0-windows-setup.exe

10.1 MB

Run the downloaded file.
If Windows SmartScreen says it protected your PC, choose More info, then Run anyway. The app isn't code-signed yet.
Start FujiNet Go Atari 7800 from the Start menu.

Portable zip

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

Download fujinet-go-atari7800-0.5.0-windows.zip

14.0 MB

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

macOS app

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

Apple silicon fujinet-go-atari7800-0.5.0-macos-arm64.zip · 11.6 MB Intel fujinet-go-atari7800-0.5.0-macos-x86_64.zip · 11.9 MB

Open the downloaded zip and drag FujiNet Go Atari 7800 into Applications.
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.)

Or clear the download quarantine in Terminal:

xattr -dr com.apple.quarantine "/Applications/FujiNet Go Atari 7800.app"

Every file in this release, with SHA-256 checksums

File	For	Size	SHA-256
online.fujinet.go.atari7800.gnome.flatpak	Linux · GNOME · Flatpak bundle	8.6 MB	982b21225dc53d31e399c255f5fa5462c21cd6e063cbe15e3c5d1e78cd88638a
online.fujinet.go.atari7800.kde.flatpak	Linux · KDE · Flatpak bundle	8.4 MB	668e6e533c8f6823b2fd57f9b1769dbca9e0158a9516aa711e33f906d5f88b5d
fujinet-go-atari7800-gnome-0.5.0-Linux.deb	Linux · GNOME · .deb	10.9 MB	5cd139afdc0d3cdf3c0ff369559940e6f9aafdab25284b8c1b6062d2626f2f26
fujinet-go-atari7800-kde-0.5.0-Linux.deb	Linux · KDE · .deb	10.9 MB	3f82fa56785d88a72164a0fc5890b9e7944769a1a4dec41a0e6d3ce0be6805b5
fujinet-go-atari7800-gnome-0.5.0-Linux.rpm	Linux · GNOME · .rpm	8.3 MB	304132826a3f27ef3fab9b948a4b348a12b2fcaff412c27b948179faa7fdd92b
fujinet-go-atari7800-kde-0.5.0-Linux.rpm	Linux · KDE · .rpm	8.4 MB	05c0dfda51e8c5570369133a15e1c9951e3e69ef29344f50c737c2b3bccac184
fujinet-go-atari7800-gnome-0.5.0-Linux.tar.gz	Linux · GNOME · .tar.gz	10.9 MB	18f7e2600dd834d80a953edf90468d1593324f930167782a5f7a93a4c9eb94f6
fujinet-go-atari7800-kde-0.5.0-Linux.tar.gz	Linux · KDE · .tar.gz	10.9 MB	aa5651c02ddec8e4c312823d310d22207c358b55423a0ebe9e7c6b1af2699408
fujinet-go-atari7800-0.5.0-windows-setup.exe	Windows installer	10.1 MB	3947e88663c052e96064c4e5a47a0cd20d3ef0bea56eee55dc404f0c24ac59c1
fujinet-go-atari7800-0.5.0-windows.zip	Windows portable zip	14.0 MB	49fbbe9c1aaf1157ba14ae2944a1307ce46b2a0f01bbd426c2bbd7af47204a6e
fujinet-go-atari7800-0.5.0-macos-arm64.zip	macOS · Apple silicon	11.6 MB	eec5e4a3ec91d7e90c4acbbed5249d6c0953b6e426a4d8104e0a3fcfe7616d8b
fujinet-go-atari7800-0.5.0-macos-x86_64.zip	macOS · Intel	11.9 MB	efa7e00f4f7dc75ec57ececc3949984088f5acd9440b35555bd3789cd76f4fd2

Built on

FujiNet Go Atari 7800 is free software (GPL-3.0). It stands on these projects:

MAME (a7800) GPL-2.0-or-later (compiled files BSD-3-Clause)

Emulator core (fork github.com/tschak909/mame, fujinet-go-a7800). The MAME team
MAME's third-party libraries Zlib, BSD, public domain and others

zlib, zstd, LZMA SDK, expat, FLAC, libjpeg, utf8proc, asmjit, SoftFloat 3, ymfm, linenoise. Their respective authors
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