> I used to know who invented Hyper Transport [...] (which is why I mentioned AMD,
> but to the best of my knowledge, they are only a licensee).
I'm not sure who invented it, but it was introduced in 2001 by the HyperTransport Consortium
"founded in 2001 by Advanced Micro Devices, Alliance Semiconductor, Apple Computer, Broadcom Corporation, Cisco Systems, NVIDIA, PMC-Sierra, Sun Microsystems, and Transmeta
Then most likely Sun.
It was originally developed by AMD/DEC.
https://www.extremetech.com/extreme/51158-api-networks-winds-down-engineering-shifts-to-amd[ Edited by terminills 16.10.2017 - 12:23 ]