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Mortal Kombat II/III Special (Unl) mirroring bug?
http://forums.nesdev.com/viewtopic.php?f=3&t=15332
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Author:  Zepper [ Tue Jan 03, 2017 7:11 am ]
Post subject:  Mortal Kombat II/III Special (Unl) mirroring bug?

I though my mapper 90 was perfect... until this time.
What's causing it?

Attachments:
mk3.png
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Author:  koitsu [ Tue Jan 03, 2017 1:51 pm ]
Post subject:  Re: Mortal Kombat II/III Special (Unl) mirroring bug?

Can FCEUX run this game? Filename + MD5 checksum (or CRC32 checksum)? If FCEUX can run it, then it might be possible to see what's going on through RE efforts.

NO$NES or Nintendulator are other possibilities, assuming they have support for mapper 90 (unsure).

Author:  zxbdragon [ Wed Jan 04, 2017 6:49 am ]
Post subject:  Re: Mortal Kombat II/III Special (Unl) mirroring bug?

mapper 90 Close the MIRR control by default

Author:  Zepper [ Wed Jan 04, 2017 8:55 am ]
Post subject:  Re: Mortal Kombat II/III Special (Unl) mirroring bug?

Mirroring control $D000 should always work & disable nametable control.
A few games will break if nametable control is active.

It's solved, but must be a manual setting, since I'm not discussing mapper number anyways.

Author:  zeroone [ Wed Jan 04, 2017 9:39 am ]
Post subject:  Re: Mortal Kombat II/III Special (Unl) mirroring bug?

Zepper wrote:
It's solved, but must be a manual setting, since I'm not discussing mapper number anyways.


Was it a file header issue?

Author:  Zepper [ Wed Jan 04, 2017 10:15 am ]
Post subject:  Re: Mortal Kombat II/III Special (Unl) mirroring bug?

No. I mean registers $D00x (except $D001) enable nametable control (NC). This game (MKII and variants) ignore NC, only $D001 mirroring control should work. Other games (Samurai Spirits?) break if you disable $D00x.

Author:  lidnariq [ Wed Jan 04, 2017 11:57 am ]
Post subject:  Re: Mortal Kombat II/III Special (Unl) mirroring bug?

And that's the difference between mappers 90, 209, and 211...

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