opensp

AN OPEN-SOURCE SP-404MKII PROJECT

OpenSP

An open set of firmware, tools, and guides for the Sp-404MKII.

Everything on this website is available on github.

Two-line rotating AntiWorkProTwerk logo from the original R3 renderer pixel trace. Stock UI and caption are omitted.
RELEASES

Custom Firmware and Utilities

The project is focused on providing an open set of utilities, community components to build your own features, as well as stock patches and fully custom firmware.

RELEASE INDEX

Downloads and verified release details will appear here.

GUIDES

Walkthroughs, Specs, and Breakdowns

Our first change on the SP.Follow the first visible firmware change in seven steps, with the original evidence, animated diagrams and an offline Python exercise.