From the article:
"it’s a really good idea to go and read the UEFI specification. You can do this. It’s very easy. You don’t have to pay anyone any money. [...] You can find it [right here on the official UEFI site]. You have to check a couple of boxes, but you are not signing your soul away to Satan, or anything."
Before people click on that link and start thinking the author of the article is a damn liar (the link takes one to a menacing "Access Denied" page which prompts users to login or register (which in turn involves filling out a form and possibly paying a large amount of money)), here is a link to free downloads of the specification documents (as PDF files):
But also read the blurb on the page:
"By downloading any of the UEFI Specifications, you acknowledge that no license, express or implied, is granted to you to distribute, additionally reproduce, implement or otherwise use for any purpose (other than to read only) the UEFI Specifications, and that all rights, title and interest in and to the UEFI Specifications, including all intellectual property rights of any type whatsoever, are owned by the UEFI Forum, or subject to rights granted to the UEFI Forum."
So if I download these files, I acknowledge that I may not use the spec to do anything useful with it. It might be better to derive UEFI knowledge from the Tianocore sources, since those come with no strings attached.
Before people click on that link and start thinking the author of the article is a damn liar (the link takes one to a menacing "Access Denied" page which prompts users to login or register (which in turn involves filling out a form and possibly paying a large amount of money)), here is a link to free downloads of the specification documents (as PDF files):
http://www.uefi.org/specifications
And by the way, no need to check any boxes at all, just click any of the links and the download should start right away.