Bitstream formats are probably the worst-kept secret in the industry. FPGAs are inherently very regular in structure, so figuring out which bit goes where is pretty trivial. Try to disclose what you find in public, however, and they&#x27;ll quickly send their lawyers after you...<p>From what I know, this is the only public effort that&#x27;s remained up so far:<p><a href="http:&#x2F;&#x2F;www.clifford.at&#x2F;icestorm&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.clifford.at&#x2F;icestorm&#x2F;</a>