Alternatively...
There is a scene in the movie Casino where there are two guys collaborating and cheating at a table game. One of the internal security people dressed discretely in a suit walks up with a cattle prod.
It's a movie, that would never happen in any big casino (for one, way too many witnesses).
I will drop a message to my wider network and see if there is a section that could be interpreted to fit this situation.
Two issue would be:
1. Using a computer device to commit fraud. 2. Accessing the ROM which was digitally protected as well as not intended for general public consumption.
If you used this against a machine in the wild you're using the machine in the intended way. The access is authorised; there's no interdition to using reference sources.
It doesn't seem like a breech of UK CMA to me.
If the OP published the ROM then it's possibly copyright infringement.
Plus the claim was:
> in every jurisdiction
Nevada has some of the most strict gambling laws in the world (and showing it is illegal in Nevada hasn't even been satisfied yet).