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Error in F-1 Race (1984)
http://forums.nesdev.com/viewtopic.php?f=3&t=10845
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Author:  zeroone [ Thu Dec 29, 2016 10:06 am ]
Post subject:  Re: Error in F-1 Race (1984)

Here's another one:

Minna no Taabou no Nakayoshi Daisakusen

requires [$0011] = $FF or it won't start up.

Author:  koitsu [ Thu Dec 29, 2016 11:07 am ]
Post subject:  Re: Error in F-1 Race (1984)

I've begun adding these games to the wiki, with references. I urge others to edit the details here, and add relevant entries. The more accuracy, the better. http://wiki.nesdev.com/w/index.php/Game ... RAM_values

Author:  thefox [ Mon Jan 02, 2017 7:34 am ]
Post subject:  Re: Error in F-1 Race (1984)

The Terminator 2 problem from viewtopic.php?p=180752#p180752 kind of fits the picture. The problem there was that they were calculating a checksum as a simple sum of the related bytes, making it think that a stored checksum of the data was correct when RAM was initialized to all zeros.

Author:  koitsu [ Mon Jan 02, 2017 8:39 am ]
Post subject:  Re: Error in F-1 Race (1984)

thefox wrote:
The Terminator 2 problem from viewtopic.php?p=180752#p180752 kind of fits the picture. The problem there was that they were calculating a checksum as a simple sum of the related bytes, making it think that a stored checksum of the data was correct when RAM was initialized to all zeros.

Read the post: I'd say that *definitely* qualifies. If you could add that one to the wiki, that'd be awesome. :)

Author:  zeroone [ Mon Jan 02, 2017 5:06 pm ]
Post subject:  Re: Error in F-1 Race (1984)

Here's another mystery ROM:

Thunderbolt 2.7z <Thunderbolt 2 (Ch) [!].nes>

It works in some emulators and not others. All the other mapper 115 ROMS that I can find appear to work in most emulators. I suspect initial main memory, VRAM or mapper register values may have something to do with the discrepancy. But, I haven't been able to nail it down.

Author:  zeroone [ Mon Jan 02, 2017 8:34 pm ]
Post subject:  Re: Error in F-1 Race (1984)

Multi-Game Pirate Carts.7z <45-in-1 (JY-120A) (Unl) [U][!].unf> is another ROM that appears sensitive to initial conditions. But, I can't figure out how FCEUX or Nestopia is able to run it.

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