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@MameHaze Absolutely nothing, FYI

not too surprised. Outside of the HotGen ones and some simpler use cases some key things are missing. Timer interrupts and Sound interrupts definitely need figuring out properly, but also this issue I mentioned with things like Gormiti, Wireless Hunting where no tilemap data

.. is ever populated. Even the HotGen ones aren't perfectly stable. There's just enough different with the SoC to be annoying, but in many cases I feel like I'm working with incorrect data for the video.

Lazertag (the one using the Div opcodes) is an interesting one because it's clearly yet another developer (Tiger) with a different codebase again, so it's likely doing some other things differently too.

Really they need a good sit down with the code and some extensive studying, but people such as Tahg are far better at doing that than I am. I point to Gormiti because it's one of the simpler cases being just ROM based, rather than loading into RAM, thus ruling out problem sources

Gormiti is interesting. It seems to be setting up the tmap0 tile graphics base to be 004188b7, and it also uses "RegSet" mode. Just wondering, could it be that it should be hitting the CS2 space (which contains that range) instead of going through space->read_word?

it's possible, but IIRC the main problem is that the tables in main RAM used for the tilemaps are blank, same with Wireless Hunting, Triple Header Sports, and one of the Walking Dead games at least. There's some convoluted code to set up a bunch of stuff....

... that includes a pointer to where the actual tile definitions are, but after creating that table it does nothing with it, doesn't seem to set any pointers to it, and never copies data.