Yeah, there were a few words early on that struck me as "This is a non-native English speaker" sort of translation issues, which don't bother me in technical writing like this. But when they started doing INB/OUTB examples as memory addressed instructions, vs copying into a register... I get the point being made, but also, that's not a translation error. Don't use the "This is an actual instruction" font if you're not quoting actual instructions that exist on the hardware. "inb 0x8, 0xFF" is not a valid x86 instruction, not even close.

Anyway, I'd also like to see some of their source, or hardware diagrams, but... it'll come out eventually, I suppose.

Proper IOMMU configuration and assigning anything with DMA to a disposable service VM still solves a lot, though at least these attacks require physical access. So far. I'm sure someone, at some point, will release a SD Express card with awful enough firmware that you can pivot through it for a software-only attack on this sort of system.