The BOOM processor can be found at (https://github.com/riscv-boom/riscv-boom).
There is also a Google group at (https://groups.google.com/forum/#!forum/riscv-boom).
Updated documentation located at https://docs.boom-core.org.
For the most up to date documentation, look at https://docs.boom-core.org. You can download a hard copy of that documentation there by clicking on the lower lefthand corner (where it says Read the Docs) and download a PDF.
To build (and then read) the latest version of this document using Latex:
$ git clone https://github.com/riscv-boom/riscv-boom-doc.git
$ cd riscv-boom-doc
$ make
$ open main.pdf
The information in this publication is subject to change without notice.
Copyright 2016 Christopher Celio
The "BOOM Design Specification" is licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit (http://creativecommons.org/licenses/by/4.0/).
Pull requests to this document are welcome!