Toolchain for the Uxn stack machine.

41d9e08 Updated include to new syntax

7 hours ago

cfd7d46 Updated include to new syntax

~rabbits pushed to ~rabbits/dexe git

7 hours ago


An assembler and emulator for the Uxn stack-machine, written in ANSI C.

#Download binaries

Binaries are available for 64-bit x86 computers running Linux, Windows and macOS.


#Linux/OS X

To build the Uxn emulator, you must install SDL2 for your distro. If you are using a package manager:

sudo pacman -Sy sdl2             # Arch
sudo apt install libsdl2-dev     # Ubuntu
brew install sdl2                # OS X

Build the assembler and emulator by running the build.sh script. The assembler(uxnasm) and emulator(uxnemu) are created in the /bin folder.

	--debug # Add debug flags to compiler
	--format # Format source code

If you wish to build the emulator without graphics mode:

cc src/uxn.c -DNDEBUG -Os -g0 -s src/uxncli.c -o bin/uxncli

#Plan 9

To build the Uxn emulator on 9front, via npe:


If the build fails on 9front because of missing headers or functions, try again after rm -r /sys/include/npe.


Uxn can be built on Windows with MSYS2. Install by downloading from their website or with Chocolatey with choco install msys2. In the MSYS shell, type:

pacman -S git mingw-w64-x86_64-gcc mingw64/mingw-w64-x86_64-SDL2
export PATH="${PATH}:/mingw64/bin"
git clone https://git.sr.ht/~rabbits/uxn
cd uxn

#Getting Started


To launch a .rom in the emulator, point the emulator to the target rom file:

bin/uxnemu bin/piano.rom

You can also use the emulator without graphics by using uxncli. You can find additional roms here, you can find prebuilt rom files here.


The following command will create an Uxn-compatible rom from an uxntal file. Point the assembler to a .tal file, followed by and the rom name:

bin/uxnasm projects/examples/demos/life.tal bin/life.rom


You can send events from Uxn to another application, or another instance of uxn, with the Unix pipe. For a companion application that translates notes data into midi, see the shim.

uxnemu orca.rom | shim

#Emulator Options

  • -s 1, -s 2 or -s 3 set zoom (default 1)

#Emulator Controls

  • F1 toggle zoom
  • F2 toggle debug
  • F3 capture screen
  • F4 load boot.rom

#Need a hand?

Find us in #uxn, on irc.esper.net