See the spec document for the details.
You can use the typst compiler to generate a pdf from the spec file.
The supporting code and reference HDL in this repository are under a GPL-3 license.
You may use the ISA on a HDL IP, emulator or similar under a different license, provided you don't use any of the reference HDL or code included in the spec, the spec itself along with it's companion data files as well as the ISA IP are provided under apache-2.0 license.