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 Post subject: Fansubbing 3DO games.
PostPosted: Sat May 10, 2008 9:17 pm 
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I remember Gir Draxa mentioning something about editing the text in 3DO games without the need to re-encrypt. I guess it's not actually encrypting, I guess it's hashing, so if you keep the file lengths the same, you might be able to dupe the system into booting a disk?

I've just UnCDROM'd Dr Hauzer, and the entire text is easily readable in Japanese, and stored neatly, it's even formatted in seperate files, on the disk. It wouldn't take much to Fansub this.

That would be quite something? Eh?

Failing that, anyone care to speculate how the the Game Guru worked for Oldergames? I'm guessing there is a simple way of getting the GameGuru bootfiles into loading anything.

but...

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PostPosted: Sat May 10, 2008 9:20 pm 
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ANyone know where I can get information on the 3DO boot sequence, what files do what, in what order?

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PostPosted: Sat May 10, 2008 11:14 pm 
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Holy crap this would be so awesome if this would work

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 Post subject: dr hauzer
PostPosted: Fri Aug 29, 2008 4:17 pm 
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this would be awsome. from what i remeber drH was like a junior version of code veronica but older. total 3d!


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 Post subject: Re: dr hauzer
PostPosted: Fri Aug 29, 2008 9:24 pm 
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bulletbob wrote:
this would be awsome. from what i remeber drH was like a junior version of code veronica but older. total 3d!


http://fz1-3do.blog.co.uk/2006/09/21/title~1146636

It's an awesome game for sure :)

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PostPosted: Fri Aug 29, 2008 10:48 pm 
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You know we'd have to do Policenauts next :D

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PostPosted: Sat Aug 30, 2008 7:51 am 
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3DO Experience wrote:
You know we'd have to do Policenauts next :D


That would be awesome wouldn't it?

Then Blue Forest Story

Then Grand Chef.

As an aside, I've been studying Japanese (with a private tutor) for a few weeks now. I am the dumbest language student on earth. It just doesn't sink in. Ug! No one really speaks Japanese I reckon. I believe they just mumble like that when the tourists are around.

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PostPosted: Sat Aug 30, 2008 11:24 am 
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fingers crossed for you! In theory it should work but hey the last thing I ever programmed was in BASIC on the VIC20! so what would I know!

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 Post subject:
PostPosted: Mon Mar 30, 2009 4:40 pm 
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Right, so, I'm perilously close to figuring this out.

Some points:

1) You can indeed edit the ISO in a Hex editor and still have it run. It's not encrypted, it's hashed.

2) Mrs 3DOkid (native Japanese reader/writer) has agreed to translate the text for me. :)

3) I found the text :) (which was a good thing given point #2)

4) the text is recorded 5 times in the ISO and I cannot figure out which one to change :( but I am close - very close :)

5) Converting Kanji to hex to ASCII (so you can search) is very painful but not impossible.


6) wish me luck :)

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 Post subject:
PostPosted: Mon Mar 30, 2009 11:00 pm 
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Good luck! You know I'll need to play this when you are done.

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 Post subject:
PostPosted: Mon Mar 30, 2009 11:10 pm 
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You will. It's awesome.

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 Post subject:
PostPosted: Tue Mar 31, 2009 12:23 am 
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3DOKid wrote:
Right, so, I'm perilously close to figuring this out.
4) the text is recorded 5 times in the ISO and I cannot figure out which one to change :( but I am close - very close :)


Change all of them. The 3DO's filesystem duplicates files across the disc to lower disc seek times. It will use different files at different times, depending on where the laser head is.

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 Post subject:
PostPosted: Tue Mar 31, 2009 7:57 am 
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Mobius wrote:
3DOKid wrote:
Right, so, I'm perilously close to figuring this out.
4) the text is recorded 5 times in the ISO and I cannot figure out which one to change :( but I am close - very close :)


Change all of them. The 3DO's filesystem duplicates files across the disc to lower disc seek times. It will use different files at different times, depending on where the laser head is.


Bingo. Thank you.

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 Post subject:
PostPosted: Sun Apr 05, 2009 8:51 am 
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This thread has gotten me thinking and tinkering again. I looked up the basics of digital signatures, and from what I gather, it works like this:

1. A hash function is run to get a hash of the source data
2. The results of the hash are encrypted
3. The encrypted hash is bundled with the data and delivered
4. The encrypted hash is decrypted at the destination
5. The hash function is run on the delivered data
6. If the calculated hash matches the decrypted hash, the signature is verified

So assuming this is the scheme the 3DO uses, there are a couple of ways to approach running homebrew. We could learn the encryption key so that we can create our own signatures, or we can create data that matches an existing signature. Depending on the complexity of the hashing algorithm, creating data to match an existing signature could be fairly straightforward.

Does anyone have more information about what changes to an ISO break a game and what changes don't? As Gir Draxa and 3DOkid have talked about, modifying data files and keeping them the same size doesn't break the game. I just did a test and verified that modifying the main executable (LaunchMe) and keeping it the same size doesn't break it, either.

Does adding a file break it? How about deleting a file? Or changing a file name? Do all files have to remain the same size, or just certain ones? Can you extract and rebuild the ISO and have it work, or do you have to directly edit the original?

I could do some more experiments to answer these questions, but if anyone knows off the top of their head, it would save me some trouble. :)

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 Post subject:
PostPosted: Sun Apr 05, 2009 8:09 pm 
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I'm cheering you on 3DOKid! :D


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 Post subject:
PostPosted: Thu Jul 01, 2010 1:55 am 
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In honor of finally being able to sign 3DO discs this thread is hereby resurrected.


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 Post subject:
PostPosted: Fri Jul 23, 2010 8:43 pm 
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3DO Kid, you could also tap ULTRA EDIT 32, it's what I used to edit CD images for the 3DO years back.

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 Post subject:
PostPosted: Tue Aug 24, 2010 11:41 am 
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It would be interesting to see a translation for Moon Cradle, one day or another.

PS Gir Draxa, great avatar! Splatterhouse forever! :)

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 Post subject:
PostPosted: Thu Aug 26, 2010 9:13 pm 
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Plissken wrote:
It would be interesting to see a translation for Moon Cradle, one day or another.

PS Gir Draxa, great avatar! Splatterhouse forever! :)



Thanks, but actually, its not from Splatterhouse. It's the final boss (version A) from EYE OF TYPHOON for 3DO. I donated some avatar pics awhile back that were taken from the game. Trev uses one of them as well.

Oh, and instead of Moon Cradle, how about we do a total translation of DEEP BLUE FLEET. lol

Drax

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 Post subject:
PostPosted: Mon Jun 11, 2012 12:44 am 
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3DOKid,

Did you make any progress on this? Sounds like you were on the right track.

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PostPosted: Tue Jul 10, 2012 1:53 pm 
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Im curious too. Any luck?

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PostPosted: Sun Sep 30, 2012 11:26 pm 
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3DOKid wrote:
I've just UnCDROM'd Dr Hauzer, and the entire text is easily readable in Japanese, and stored neatly, it's even formatted in seperate files, on the disk. It wouldn't take much to Fansub this.


Once you've got a script dump, it's much much easier to get a translator on board. I'm sure someone at ROMHacking.net would be up for participating in the first 3DO fan-translation ever!

Are there any Mac-based tools for mounting 3DO filesystems, BTW? Or, regardless of platform, what tools are folks generally using? I know there's some kind of support in Linux, and I'd love to be able to take a look inside real discs or, if necessary, disc images.


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PostPosted: Thu Jul 18, 2013 5:16 pm 
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Just posted about this on ROMHacking.net.


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PostPosted: Sun Jan 19, 2014 12:33 am 
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Six months later, still wondering about this. If the Doctor Hauzer text files can be made available, it shouldn't be too hard to find a translator, if Mrs. 3DOKid isn't interested/available anymore. (I have an original DH disc but I'm on a Mac.)


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