MAMEWorld Forums - News - Re: @Kale's: The COP Diary #1

> > I can't say anything about challenge, but in terms of outright complexity seibu's
> > stuff has sloop beaten hands down.
> >
> > LN
>
> They probably have betting pools over at Seibu/Moss on when Mamedev finally breaks
> the protection.

It isn't protection so much as a complete game-programmable co-processor with access to a ton of obscure peripherals, complicated sprite-sprite collision, an extremely complex dma engine (and palette dma), and math acceleration (sin/cos/tan/arctan/exp/etc). The games used these features (often poorly) to speed things up and offload processing from the main cpu.
The only part I know for sure is protection is the sprite encryption, but that's actually done by the sprite controller chip; raiden2 and zeroteam and raidendx just use the co-processor to unpack the key data before uploading it to that chip. (we have not yet figured out the exact correlation between the key data and the hardcoded-in-mame keys for each game but eventually it will get worked out)

LN

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