Source of the simulation engine (ngspice-*.wasm in this folder) ngspice 47, compiled to WebAssembly with Emscripten by build.sh, with the patches in patches/. ngspice is Modified BSD and contains numparam (GNU LGPL v2 or later): see COPYING.ngspice.txt and ../licenses/THIRD_PARTY_NOTICES.md. Exact upstream source: source/ngspice-47.tar.gz (this site), also https://sourceforge.net/projects/ngspice/files/ng-spice-rework/47/ngspice-47.tar.gz/download SHA-256: 894e649651f1838a14095e5a5439e7d3aa63e87ede14d283173fda4fcdef675f Build files: build.sh, no-system.js, patches/, BUILDINFO.txt (here) and the engine/ folder of the project's repository. How to rebuild it or use your own build: README.md.