Oh dear, I hadn't realised Bristol Uni had broken the link. That paper has some information, as well as my UG thesis: https://ia600408.us.archive.org/22/items/archive_IHGC/Thesis...

Yeah the current closed nature of OMA means there's limited information at present. I am working on publishing more over the next year. It is essential the wider community starts to get access to at least the modified RISC-V ISA, to independently validate the security claims.