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RetroForth

RetroForth is a modern, pragmatic Forth drawing influence from many sources. It clean, elegant, tiny, easy to grasp, and adaptable to many tasks.

It's not a traditional Forth. Drawing influence from colorForth, it uses prefixes to guide the compiler. From Joy and Factor, it uses quotations (anonymous, nestable functions) and combinators (functions that operate on functions) for much of the stack and flow control. It also adds vocabularies for working with strings, arrays, and other data types. Source files are written in Unu, allowing for simple, literate sources.

The source and documentation are distributed under the ISC license.

Community

#retro on irc.libera.chat

#retro:libera.chat (Matrix)

IRC Logs

Bug Reports

Overview

RetroForth runs on Nga, a tiny virtual machine emulating a MISC style processor. Implementations of this are included in 65c816 Assembly, C, C++, C#, JavaScript, Nim, Pascal, Python, Rust, Swift, and Retro.

Download

New releases are normally done in January and July.

The current release is 2023.3

Source & Docs

Documentation

Updated from the development snapshots.

Latest Documentation (epub)

Latest Documentation (text)

Glossary (text)

Glossary [concise] (text)

Additional Documents

Development Snapshots

These are updated hourly.

Latest Source

retro.c (Amalgamation for BSD, Linux, Haiku, Windows)

Repositories

Fossil:

http://forthworks.com:8000

Git:

https://git.sr.ht/~crc_/retroforth

https://github.com/crcx/retroforth.git

Resources

Examples

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If you are interested in a related, but smaller system, take a look at Konilo.

Konilo