Not an attorney but from what I understand in the traditional view of copyright it is often legal to reverse-engineer a proprietary system for integration with

Not an attorney but from what I understand in the traditional view of copyright it is often legal to reverse-engineer a proprietary system for integration with third-patty hardware/software if nothing copyrighted from the original product otherwise not licensed to you ends up the final third-party product. Some people make a big deal out of reverse-engineering blobs through disassembly particularly for certain discrete components (e.g DSP or GPUs) but a) writing a set of clean-room specifications not containing any copyrighted information to use as a reference is a known task and often considered legal and b) m1n1 makes it in some cases easier to understand how the hardware is being used versus manual disassembly of blobs or drivers.