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

So, basically, Seibu has put up as many barriers (custom hardware) as it possibly can to frustrate anyone who attempts to reverse engineer it. Saying they've done a good job in that regard is an understatement.

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