Show HN: I Wrote A BASIC Interpreter That Boots On UEFI Machines

A developer has released Thoreau BASIC, a small, self-contained BASIC interpreter that can boot directly on UEFI firmware without requiring an operating system. This project represents a technical achievement in low-level programming and retro computing, allowing users to run a classic programming environment natively on modern hardware. The developer shared the project openly on Show HN, inviting feedback and collaboration.

The project, created by an individual developer, involves a minimalistic BASIC interpreter designed to be bootable on UEFI-based systems. Unlike traditional implementations that run on Windows, Linux, or other OSes, Thoreau BASIC is built to initialize directly from UEFI firmware, similar to how small bootloaders or firmware utilities operate. The developer, who has a background in low-level programming, aimed to recreate a nostalgic programming environment, including features like line numbers, immediate mode, simple graphics, strings, and arrays, reminiscent of vintage BASIC implementations.

According to the developer, the interpreter is written in C and assembly, and it is small enough to fit into a UEFI boot partition. The project includes a custom bootloader that loads the interpreter directly into memory, bypassing the need for an OS. The release is available publicly, with instructions on how to build and deploy the system on compatible hardware. The developer emphasized that this project is primarily a proof of concept, demonstrating that it’s possible to run a full BASIC environment natively on modern firmware without relying on an operating system.

Implications for Retro Computing and Firmware Development

This project underscores the potential for running vintage programming environments directly on modern hardware, sidestepping traditional operating systems. It highlights advances in firmware development, low-level programming, and the ability to create standalone computing environments. For enthusiasts, this opens avenues for retro computing, embedded systems, and educational projects that explore how firmware can host complex applications. Additionally, it demonstrates the increasing accessibility of low-level programming, which can inspire further innovations in bare-metal software development.

Background on UEFI Booting and Retro Programming Projects

UEFI (Unified Extensible Firmware Interface) is the modern standard for firmware interfaces, replacing BIOS in most systems. It provides a flexible environment for booting and initializing hardware before an OS loads. Over recent years, hobbyists and developers have explored booting custom code directly from UEFI, often for embedded applications or experimental operating systems. However, running a full programming environment like BASIC directly from UEFI is less common. Historically, BASIC interpreters were embedded in early personal computers, but most modern systems rely on complex OSes that abstract hardware details. This project revives the idea of a standalone programming environment that operates at the firmware level, inspired by vintage computing but implemented with modern tools.

“My goal was to create a simple, vintage-style BASIC that could run directly on hardware, without needing an OS. It’s a proof of concept that shows how flexible UEFI firmware can be.”

— The developer

Limitations and Compatibility Uncertainties

It is not yet clear how broadly compatible Thoreau BASIC will be across different hardware platforms. The developer has tested it on select UEFI systems, but hardware variations, firmware implementations, and security settings could affect deployment. Additionally, the project’s stability, performance, and feature set are still under evaluation, and it remains a proof of concept rather than a fully polished product. Compatibility with legacy BIOS systems or older hardware is also uncertain, as the project relies on UEFI features.

Future Development and Potential Uses

The developer plans to refine Thoreau BASIC, improve documentation, and explore broader hardware support. Community feedback may lead to additional features, such as better graphics or extended language capabilities. There is also interest in integrating this approach into embedded systems, educational tools, or custom firmware projects. As the project matures, it could serve as a foundation for further experimentation in firmware-level computing, or inspire similar initiatives to run other vintage environments directly on hardware.

Key Questions

Can I run Thoreau BASIC on any UEFI system?

It is designed for UEFI systems that support the necessary boot procedures. Compatibility may vary depending on hardware and firmware settings. Users should follow the provided instructions and verify UEFI features before attempting deployment.

Does this require any special hardware or modifications?

Generally, a UEFI-compatible PC with an accessible firmware interface is sufficient. No special hardware is needed, but secure boot settings might need to be disabled or configured appropriately.

Is Thoreau BASIC suitable for educational or practical use?

Currently, it is a proof of concept primarily aimed at hobbyists and enthusiasts. Further development would be necessary to make it a stable environment for educational or practical programming tasks.

Will this project support graphics or advanced features?

The initial version focuses on core BASIC features like line numbers, strings, and arrays. Future updates may include basic graphics or extended language features, depending on community feedback and developer interest.

How can I try or contribute to Thoreau BASIC?

The project is available publicly, with build instructions and source code shared by the developer. Interested users can clone the repository and experiment, or contribute to development through feedback and code improvements.

Source: hn