MAMEWorld Forums - News - Re: Monkey Revival

> > > That’s great news about "Typing Monkeys" project comes back, and thanks to all
> > people
> > > involved on that project for their time and work.
> > > I know that can be off topic, but I’ve read on Guru’s site that Operation Wolf
> > C-chip
> > > was decapped and the rom had been extracted by Capsoff. Is it true? There isn't
> any
> > > post about it on Caps0ff blog
> >
> > It's true.
> >
> > Haze added support for the dumps in
> > https://github.com/mamedev/mame/commit/0019c8cbd019f706456f95b82fbcf7ffee641187
> >
> > However, as he says, it's currently bad.
> >
> https://github.com/mamedev/mame/commit/d...10c2da50363a441
> >
> > This could be why they didn't post news about it.
> >
> > - Stiletto
>
> To clarify
>
> The C-Chip has 2 ROM parts, a MASK rom inside the UPD78C11 which is assumed to be the
> same for all games and an EPROM which definitely differs between games.
>
> The MASK rom was imaged and typed up, it's rather interesting. The internal checksum
> on that passes, so chances are it's a good dump.
>
> EPROMs can't be dumped using this technique as there's nothing to see, so an attempt
> was made to dump the EPROM by wiring it up directly to the decapped die but the
> Cap0ff guys couldn't get one of the address lines to work properly, so half the data
> is missing. It was very delicate work, tiniest of slips and you have to start over.
> The dumped data is interesting as you can see some of the tables the current
> operation wolf simulation uses in it, but as the dump isn't complete it wasn't
> possible to switch the emulation over to using it.
>
> The MASK rom actually contains what looks like functions that could be exploited to
> read out the EPROM, so attempts have been made to use them, however it seems Taito
> anticipated this and the one of the port writes done in the code is blocking any
> further commands or responses externally. Annoying, otherwise you would have had some
> rather juicy news already.

Annoying, but not insurmountable, right? Is there a way around that?

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