This project is a fork of uEforth (https://github.com/flagxor/ueforth), Copyright 2021-2024 Bradley D. Nelson, licensed under the Apache License 2.0 (see LICENSE). The original copyright notices are kept in every file that comes from it.
It is not affiliated with the original author and is not endorsed by him.
Additions and modifications, Copyright 2026 Luginfo10, under the same license:
- SDL2 bindings, ABC music, soundfont and examples (ports/posix/sdl2*.fs, ports/web/sdl2*.fs, examples/)
- ansi_compat.fs: standard ANS words missing from the core
- Game Boy Advance port (ports/gba/)
- Raspberry Pi Pico (RP2040) port (ports/pico/), adapted from the pico-ice port
- Android ports: command line, WebView and native SDL2 (ports/android/), SDL console (ports/posix/sdl2_console.fs)
- words reference tools (tools/words_*.py, WORDS.md)
- text editors ed and writhdeck (ports/posix/editor.fs, writhdeck.fs, eval_copy.fs), after the author's WrithDeck
- lugforth-mini, the POSIX build without editors, SDL2 and servers (ports/posix/posix_mini_boot.fs)
- the line editor (common/lineedit.fs) and the SDL console window with colors (ports/posix/sdl2_console*.fs)
- bare-metal AArch64 port for QEMU and the Raspberry Pi 3/4 (ports/rpi/)
- UEFI port for x86-64 PCs (ports/efi/)
Files adapted from upstream carry both the original notice and a line "Modifications Copyright 2026 Luginfo10".
examples/games/2048.fs, examples/graphics/3d.fs, examples/graphics/sdl2_3d.fs, examples/utils/inference/inference.fs and examples/utils/inference/weather.fs (and their tests) derive from the 2048-game, 3Dforms and INFERENCE projects of Marc Petremann (https://github.com/MPETREMANN11/eForth-Windows), GNU General Public License. They are GPL, not Apache 2.0.
examples/graphics/sdl2_turtle.fs is written after forthtoise.fs of Eric Forgeot (https://gitlab.com/garvalf/forth-is-fun), MIT license, which itself builds on gforth-turtle (Robert Coffey) and WAForth (Remko Troncon); it keeps the names of the words, the code is new and under the Apache License 2.0 like the rest.
MIT License
Copyright (C) Eric Forgeot
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
examples/games/sdl2_raycaster.fs is written after the raycasting demo of JS-Forth (https://github.com/CCurl/JS-Forth), by Chris Curl, under the MIT license below; the new code is under the Apache License 2.0 like the rest.
MIT License
Copyright (c) 2026 Chris Curl
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
examples/games/sdl2_tetris.fs, examples/games/sdl2_snake.fs and examples/games/sdl2_minesweeper.fs are written after tetris.r3, snake.r3 and minesweeper.r3 of r3forth (https://github.com/phreda4/r3), by Pablo Hugo Reda, under the MIT license below; the new code is under the Apache License 2.0 like the rest.
MIT License
Copyright (c) 2022 Pablo Hugo Reda
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
ports/baremetal/font8x8.h is font8x8 by Daniel Hepper (https://github.com/dhepper/font8x8), after Marcel Sondaar and the IBM VGA fonts, in the public domain.