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World Driver Championship Debugger

 
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zoinkity
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Joined: 24 Nov 2005
Posts: 1729

 PostPosted: Tue Sep 13, 2011 9:35 am    Post subject: World Driver Championship Debugger Reply with quote Back to top

http://www.mediafire.com/file/jf4v5hgs5mric1h/NWOE-debug.zip

The zip contains a debugger patch for the north american release of World Driver Championship (NWOE). Each of those patches is identical, but figured this way if one was a problem or you prefer a certain format there's bound to be something of use.
You can only apply those patches to an unbyteswapped ROM.
To use this ROM you must have an expansion pak installed (8MB, not 4MB). Debug data will be written to this region.

Printing to screen is a bit of an issue, filling the screen with data so quickly you really can't read it at all (and occasionally locks). So, instead, made a buffer starting at 0x80400004. The word at 80400000 is the current size of the buffer, and when that's exceeded it resets the buffer back to 80400004.
Strings are all NULL-terminated and stored end-to-end with this format:
0x0 4 current COP0 Count (hex value)
0x4 var string, NULL terminated

The Count is included firstly so there's some idea of when each event occured but more importantly because you can then set a breakpoint with the Compare register on a subsequent run.

-Zoinkity
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SubDrag
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Joined: 16 Aug 2006
Posts: 6172

 PostPosted: Tue Sep 13, 2011 9:58 am    Post subject: Reply with quote Back to top

That's very cool, I wish we could get this for more games!
 
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fantsu
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Joined: 30 Apr 2007
Posts: 1003

 PostPosted: Thu Sep 15, 2011 10:13 am    Post subject: Reply with quote Back to top

WOW!
I HAVE to try this as soon I have some time.
Shocked

Nice to see some progress with this wonderful game.

btw. What is (NWOE)?
Does it differ from my ntsc version of the rom? I don't know what version I even have.
There cant be that many?
Very Happy

Playing with PJ1.5 and this video plugin is so boring Smile
http://www.mediafire.com/?f33q46k0lfp4t3h
 
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radorn
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Joined: 23 Sep 2007
Posts: 1424

 PostPosted: Thu Sep 15, 2011 11:17 am    Post subject: Reply with quote Back to top

NWOE is the internal gamecode for NTSC WDC.
N means it's a gamepak (as opposed to a 64dd disk, for example)
WO is the game's ID.
E is for English, and it's Nintendo's code for american NTSC releases (P is for PAL, for example, and it's the code most games have in Europe, there are others).
 
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fantsu
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Joined: 30 Apr 2007
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 PostPosted: Thu Sep 15, 2011 12:24 pm    Post subject: Reply with quote Back to top

Thanks radorn, so it works with my copy, nice.
Very Happy

Now I just hope I'll find something.
 
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fantsu
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Joined: 30 Apr 2007
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 PostPosted: Sun May 20, 2012 3:42 am    Post subject: Reply with quote Back to top

btw. zoinkity

did you ever find anything?

Wink
 
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