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Guru news #38847 02/27/08 03:04 PM
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http://www.mameworld.net/gurudumps/

How is it MESS related?

that bit:

Quote:
A couple of previously-undumpable Gameboy Color carts, thanks to BigFred


Bonus: some cool drama between the lines

Re: Guru news [Re: ReadOnly] #38848 02/27/08 03:17 PM
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etabeta78 Offline
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even of MESS interest the last Epoch Pocket Computer cart!

Re: Guru news [Re: etabeta78] #38858 02/27/08 04:32 PM
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ht1848 Offline
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The decapping news is certainly interesting.

Any of the MAME targets have implications for MESS?

I see a few special SNES chips that call out for decapping in LN's inventory via the wiki, but is there other targets MESS has?


Re: Guru news [Re: etabeta78] #38859 02/27/08 04:33 PM
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R. Belmont Online Content
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There's actually more possible MESS-related stuff here. This decapping company is able to pull ROMs out of MCUs by means other than just optical scanning, so all MCUs with embedded ROMs are potentially fair game instead of just a limited subset.

Re: Guru news [Re: R. Belmont] #38860 02/27/08 04:40 PM
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Duke Offline
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Maybe the Guru can add some Amiga parts - the Amiga keyboard controller MCU has an internal ROM for example.

Re: Guru news [Re: Duke] #38869 02/27/08 06:00 PM
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How about the Super FX chip? I've yet to see any documentation or other proof that it isn't some MCU running a bytecode interpreter. Even if it's not, perhaps decapping it could lead to identification of the type of chip it really is, if it's a licensed design and not just a custom fab.

Re: Guru news [Re: MooglyGuy] #38873 02/27/08 06:46 PM
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The SuperFx is probably the least interesting SNES-related chip to attack short of the SA-1. Both have extensive opcode-level documentation (and the SA-1 is a 10 Mhz 65816).

Now, if you wanted to make a crazy bsnes-level SuperFx core, that'd be interesting, but it could conceivably be done without the expense of decapping. Is simple curiosity worht that much? I'd say getting the SNES DSP-* program ROMs would be significantly more useful for the expense, Moogly.

Re: Guru news [Re: Heretical_One] #38876 02/27/08 06:58 PM
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I can provide any snes chip to Guru if requested, all expandable.
I have over 1500 carts including many dupes.

Re: Guru news [Re: ReadOnly] #38882 02/27/08 09:44 PM
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R. Belmont Online Content
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I gotta admit, the possibility that the SFX is not a real physical CPU is quite interesting given it's very strange architecture and program flow.

BTW, the reason MG's asking is because it recently turned out that the custom protection CPU on many early Alpha Denshi boards was actually a Hitachi MCU running an interpreter that read bytecode from the external data ROM and ran it. I have no idea why they did that, but it's certainly interesting :-) And it fits in with the DSP-x model of a general purpose chip running an internal program ROM that makes it pretend to be some fixed-function thing.

Last edited by R. Belmont; 02/27/08 09:45 PM.
Re: Guru news [Re: R. Belmont] #38899 02/28/08 07:03 AM
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judge Online Content
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Stuff like the bootroms from the different gameboy and wonderswan cpus may be interesting.

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