Addendum:

> Hyperion have a dual MPC7410 card from MAI Logic for Articia S based
> Teron/AmigaOne; the card was never put to test though.

Some more information on that card:

"IIRC the demo dual-CPU module had no arbitration HW and it was up to SW to stop one CPU while the other did something."
http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=34850&forum=33#645143


Edit: Hyperionmp in March 2015 pretending the card was used by Hyperion for anything meaningful:

"It seems many have forgotten that a dual CPU module existed for the original AmigaOne from Eyetech which was never commercialised but did nonetheless exist for other purposes."
http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=39959&forum=14&start=100#753297

[ Edited by Andreas_Wolf 23.10.2015 - 10:21 ]