Downloads

Everything you need to update, edit, and hack on your Mk I. Every release is versioned; older versions live in the GitHub repo.

Firmware

v1.0.4

The current firmware for your Mk I. Flash it in-browser through Softload — no separate installer, no drivers.

Download firmware How to install →

Softload

Web + Standalone

Softload is our browser-based companion editor. It runs fully offline in Chrome or Edge — no install required. If you prefer a standalone app instead, grab the binary for your platform below.

Launch web version

macOS Apple Silicon macOS Intel Windows x64

Source code

Open source

Firmware, Softload web app, and hardware design files are all open source under the MIT license. Fork it, mod it, port it — we just ask that derivative works credit Fourth State Electronics.

View on GitHub ↗