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

A developer has publicly shared Thoreau BASIC, a lightweight BASIC interpreter that can boot directly on UEFI firmware on modern computers. This project enables running vintage-style BASIC programs without the need for emulators or legacy operating systems, marking a notable achievement in the intersection of retro computing and modern firmware development.

The developer, who goes by the handle ‘Show HN,’ described Thoreau BASIC as a small, old-fashioned BASIC interpreter featuring line numbers, immediate mode, simple graphics, strings, and arrays. The project is designed to boot directly from UEFI firmware, bypassing traditional operating systems, which is unusual for such interpreters. According to the developer, the goal was to create a minimal environment reminiscent of early personal computers, but capable of running on contemporary hardware.

Thoreau BASIC is implemented in low-level code and is capable of initializing hardware, setting up a minimal graphics mode, and interpreting BASIC code stored on a FAT partition or embedded within the firmware. The developer emphasizes that the system is lightweight and intended for educational or hobbyist use, offering a nostalgic programming environment while leveraging modern UEFI features. The project is hosted on Show HN, with the developer providing source code and instructions for building and deploying the interpreter on UEFI-compatible systems.

Potential Impact on Retro Computing and Firmware Development

This development is significant because it demonstrates that vintage programming environments can be revived and run natively on modern hardware without relying on emulators or legacy operating systems. It opens possibilities for hobbyists and educators to explore early computing concepts directly on current machines, fostering a deeper understanding of firmware and low-level programming. Additionally, it showcases the flexibility of UEFI firmware as a platform for custom, minimal environments beyond its typical use for boot management.

Furthermore, Thoreau BASIC could inspire similar projects aimed at creating minimal, self-contained environments for specialized tasks or educational purposes, blending retro aesthetics with modern hardware capabilities. The project also highlights the potential for firmware-level programming and custom boot environments, which could have implications for embedded systems and security research.

Background of UEFI Boot Environment and Retro Computing Projects

UEFI (Unified Extensible Firmware Interface) replaced traditional BIOS in most modern PCs, providing a flexible and powerful platform for firmware-level code execution. While UEFI is primarily used to initialize hardware and load operating systems, it also supports custom applications and environments through its scripting and execution capabilities. Developers have previously experimented with UEFI shell scripts and minimal boot environments, but running a full interpreter like BASIC directly from firmware is relatively rare.

The revival of vintage computing environments, such as BASIC interpreters, has been a longstanding hobby within the retro computing community. Historically, BASIC was a common language for early personal computers, and many enthusiasts have sought ways to run or emulate these environments on modern hardware. Emulators like DOSBox or virtual machines have been popular, but native UEFI solutions are uncommon. This project builds on prior efforts to create minimal, self-contained environments that run at the firmware level, blending nostalgia with modern firmware capabilities.

“I wanted a small, old-fashioned BASIC interpreter that could run directly on modern hardware without needing an OS.”

— The developer ‘Show HN’

Technical and Practical Limitations Still Unclear

It is not yet clear how widely compatible Thoreau BASIC is across different hardware configurations or whether it can handle complex BASIC programs. The project is in early stages, and detailed performance benchmarks or security implications remain untested. Additionally, the scope of hardware support—such as graphics modes and peripheral compatibility—is still being explored.

Upcoming Development and Community Engagement

The developer plans to refine Thoreau BASIC, improve hardware compatibility, and possibly add features like file I/O or expanded graphics. Community feedback and contributions are expected to shape future iterations. The project’s open-source nature invites hobbyists and developers to experiment, adapt, and extend the interpreter for various use cases. Further testing on different hardware platforms and integration with other firmware projects are likely steps moving forward.

Key Questions

Can Thoreau BASIC run on all UEFI systems?

It is designed to run on UEFI systems that support the necessary minimal firmware environment, but compatibility may vary depending on hardware and firmware implementation.

Does Thoreau BASIC support modern hardware features?

Its focus is on minimalism and vintage features; support for advanced hardware like USB peripherals or network interfaces is limited or not included.

How can I try Thoreau BASIC myself?

The project is hosted online with source code and build instructions. Users need a UEFI-compatible machine and some technical knowledge to compile and deploy the interpreter.

What are the potential uses of this project?

Primarily educational, nostalgic, or experimental. It allows users to explore early programming environments or develop custom firmware-level applications.

Are there security concerns with running a custom UEFI environment?

Any firmware-level code carries risks; users should understand that running custom code at this level can affect system stability and security.

Source: hn