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BrickBot: The LEGO MindStorms RCX Hub

A collection of software, firmware, tools, and utilities for the Lego MindStorms RCX
README.md

Welcome to the LEGO MindStorms RCX Hub! 👋

This BrickBot organization contains information and projects related to the original LEGO® MindStorms set—the LEGO® MindStorms RCX!

A hacker community grew around the RCX—individuals intrigued by the capabilities and determined to push the limits of what was possible. Of a time before GitHub came to prominence as site for sharing open source projects, many of these RCX projects were scattered on various personal and univeristy websites across the Internet.

A number of these projects have otherwise disappeared from the Internet, while others languished in deprecated version control systems or could only be found by looking up the website on an Internet archive. A few were projects that had been downloaded and saved before the original web pages disappeared, but whereever and whenever possible, links to either the original website (if still active) or an Internet archive version (if available) have been included.

Despite these efforts, several projects are known to have slipped through the cracks. If anyone might still have a copy of the source code for these, the contribution of that would be most welcome.

Projects imported to this GitHub organization have been curated to varying degrees as part of the import process. Please feel free to join and contribute in whatever way you can, whether that might be cleaning up or updating documenation, converting text files to Markdown, setting up wikis, or updating code to work with the latest host platforms.

The initial ninety-plus (90+) projects gathered under this BrickBot organization on GitHub (org info) were largely collected by Matthew Sheets.

Links to archives of official LEGO® software and other files and releases related to the LEGO MindStorms RCX are available in the Archive.

This GitHub organization is not affiliated with the LEGO® Group. Please click here for the official LEGO® website.

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  1. Archive Archive Public archive

    An archive of software releases pertaining to the LEGO® MindStorms RCX. This is typically kept in read-only (archive) mode to guard against accidental changes, modifications, deletions, etc.

    1 1

  2. VisualNQC VisualNQC Public

    Perhaps the best iconic language tool to replace Lego’s RIS, it generates NQC code & facilitates handling the NQC compilation + deployment processes, too. (Project was formerly known as fUNSoftWare.)

    Java 3 1

  3. brickOS-bibo brickOS-bibo Public

    An alternative RCX operating system and firmware cloning brickOS. The kernel was written from scratch for better performance, but to the average brickOS programmer, changes should be transparent. T…

    C 14 4

  4. nqc nqc Public

    NQC (Not Quite C) is a programming language for several Lego MindStorms products, including the RCX, CyberMaster, and Scout. This BrickBot/nqc repo captures updates to the code since NQC 3.1 r6 and…

    C++ 16 9

  5. leJOS-RCX leJOS-RCX Public

    A tiny Java Virtual Machine for the Lego MindStorms RCX, containing a VM for Java bytecodes and additional software to load and run Java programs.

    Java 4 2

  6. BrickBot.github.io BrickBot.github.io Public

    A collection of software, firmware, tools, and utilities for the LEGO® MindStorms RCX

    4 1

Repositories

Showing 10 of 94 repositories
  • nqc Public

    NQC (Not Quite C) is a programming language for several Lego MindStorms products, including the RCX, CyberMaster, and Scout. This BrickBot/nqc repo captures updates to the code since NQC 3.1 r6 and is believed to be the most progressed NQC codebase.

    BrickBot/nqc’s past year of commit activity
    C++ 16 MPL-2.0 9 3 0 Updated Sep 20, 2025
  • nqc.cygport Public

    Cygwin packaging for a build of Not Quite C (NQC), which is designed for use with several products in the LEGO MindStorms family, including the RCX, CyberMaster, and Scout.

    BrickBot/nqc.cygport’s past year of commit activity
    0 GPL-3.0 0 0 0 Updated Sep 10, 2025
  • GNU-Legacy-Toolchain Public

    A legacy GNU toolchain that includes GCC 3.4.6, BinUtils 2.16.1, GPC 2.1-20070904, NewLib 1.19.0, and GDB 6.8. While primarily intended for building a cross-toolchain targeting Hitachi/Renesas H8/300 processors with the COFF (or, colloquially, HMS) format, this should work for other targets as well.

    BrickBot/GNU-Legacy-Toolchain’s past year of commit activity
    C 4 GPL-3.0 1 7 0 Updated Sep 9, 2025
  • nqc-libs Public archive

    A collection of NQC libraries and programs from various sources, plus a full NQC tutorial with accompanying code samples.

    BrickBot/nqc-libs’s past year of commit activity
    HTML 2 MPL-2.0 2 0 0 Updated Sep 4, 2025
  • h8300-hitachi-coff-toolchain.cygport Public

    Cygwin packaging for a build of the GNU Legacy Toolchain targeting h8300-hitachi-coff

    BrickBot/h8300-hitachi-coff-toolchain.cygport’s past year of commit activity
    0 GPL-3.0 0 0 0 Updated Aug 17, 2025
  • brickOS-bibo Public

    An alternative RCX operating system and firmware cloning brickOS. The kernel was written from scratch for better performance, but to the average brickOS programmer, changes should be transparent. There is a lot of code borrowed from brickOS, and numerous patches originally targeted for brickOS have been conceptually incorporated. While this proj…

    BrickBot/brickOS-bibo’s past year of commit activity
    C 14 MPL-2.0 4 13 0 Updated Jul 22, 2025
  • h8300-hitachi-elf Public

    Scripting for building a combined GNU toolchain targeting h8300-hitachi-elf

    BrickBot/h8300-hitachi-elf’s past year of commit activity
    Shell 0 GPL-3.0 0 0 0 Updated Jun 26, 2025
  • brickEmu Public

    An emulator for LEGO MindStorms RCX bricks. It emulates processor and peripherals, so it runs the original ROM code, firmware, and programs.

    BrickBot/brickEmu’s past year of commit activity
    C 3 GPL-2.0 2 5 0 Updated Jun 14, 2025
  • FOSS-RCX-ROM Public

    An open source implementation of the Lego MindStorms RCX ROM

    BrickBot/FOSS-RCX-ROM’s past year of commit activity
    Assembly 0 GPL-3.0 0 0 0 Updated May 27, 2025
  • .github Public

    Repository for the GitHub public organizational profile

    BrickBot/.github’s past year of commit activity
    1 0 0 0 Updated May 24, 2025
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