BIO Unpack is a small Python tool written by By Anton Kochkov (XVilka) in late 2013. The tool unpacks *.BIO and *.CAP EFI capsule files.

Usage: bio_unpack.py bios.rom [start offset]

Hmm, WordPress doesn’t let me use an HTTPS-prefixed URL for gist.github.com-based URLs, it omits the URL entirely. I had to remove the https prefix to make the below line appear on WordPress:

gist.github.com/XVilka/8163272

PS: I didn’t know about Github’s gist snippets service until today; thanks to DC206’s Osman for the indirect pointer! 🙂