Mortal Kombat II/III Special (Unl) mirroring bug?

Discuss emulation of the Nintendo Entertainment System and Famicom.

Moderator: Moderators

Post Reply
User avatar
Zepper
Formerly Fx3
Posts: 3262
Joined: Fri Nov 12, 2004 4:59 pm
Location: Brazil
Contact:

Mortal Kombat II/III Special (Unl) mirroring bug?

Post by Zepper »

I though my mapper 90 was perfect... until this time.
What's causing it?
Attachments
mk3.png
User avatar
koitsu
Posts: 4201
Joined: Sun Sep 19, 2004 9:28 pm
Location: A world gone mad

Re: Mortal Kombat II/III Special (Unl) mirroring bug?

Post by koitsu »

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).
zxbdragon
Posts: 498
Joined: Mon Dec 12, 2011 8:15 pm

Re: Mortal Kombat II/III Special (Unl) mirroring bug?

Post by zxbdragon »

mapper 90 Close the MIRR control by default
User avatar
Zepper
Formerly Fx3
Posts: 3262
Joined: Fri Nov 12, 2004 4:59 pm
Location: Brazil
Contact:

Re: Mortal Kombat II/III Special (Unl) mirroring bug?

Post by Zepper »

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.
Last edited by Zepper on Fri Jan 13, 2017 6:50 pm, edited 2 times in total.
User avatar
zeroone
Posts: 939
Joined: Mon Dec 29, 2014 1:46 pm
Location: New York, NY
Contact:

Re: Mortal Kombat II/III Special (Unl) mirroring bug?

Post by zeroone »

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?
User avatar
Zepper
Formerly Fx3
Posts: 3262
Joined: Fri Nov 12, 2004 4:59 pm
Location: Brazil
Contact:

Re: Mortal Kombat II/III Special (Unl) mirroring bug?

Post by Zepper »

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.
lidnariq
Posts: 11429
Joined: Sun Apr 13, 2008 11:12 am

Re: Mortal Kombat II/III Special (Unl) mirroring bug?

Post by lidnariq »

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