Emulator Issues #9249

Errors when running Monster Lab

Added by kolano over 5 years ago. Updated almost 2 years ago.

% Done:


Operating system:
Issue type:
Relates to usability:
Relates to performance:
Relates to maintainability:
Regression start:
Fixed in:


Game Name?
Monster Lab

Game ID? (right click the game in the game list, properties, info tab)


MD5 Hash? (right click the game in the game list, properties, info tab, MD5 Hash: Compute)

57dd70508dd5de44ba61f8b6675e90d4 (WBFS image)

What's the problem? Describe what went wrong.
Various errors:
GFX FIFO: Unknown Opcode (0x52 @ 000000007FFF0000,
This means one of the following:
*The emulated GPU got desynced, disabling dual core can help
*Command stream currupted by some spurious memory bug
*This really is an unknown opcode (unlikely)
*Some other sort of bug

Followed by:

Illegal command 52
CPBase: 0x0087a280
CPEnd: 0x0089e260
CPHiWatermark: 0x00020000
CPLoWatermark: 0x00012000
CPReadWriteDistance: 0x000002e0
CPWritePointer: 0x0087ae80
CPReadPointer: 0x0087aba0
CPBreakpoint: 0x00000000
bFF_GPReadEnable: true
bFF_BPEnable: false
bFF_BPInt: false
bFF_Breakpoint: false
bFF_GPLinkEnable: false
bFF_HiWatermarkInt: false
bFF_LoWatermarkInt: false

What steps will reproduce the problem?
Start the title, errors occur before even showing the Wii safety warning.

Which versions of Dolphin did you test on? Does using an older version of Dolphin solve your issue? If yes, which versions of Dolphin used to work?
4.0-8524, a Wiki editor also tested on 4.0-8642. and 3.5

What are your PC specifications? (CPU, GPU, Operating System, more)
Intel 6700K, NVIDIA 970 x2, Windows 10

Is there any other relevant information? (e.g. logs, screenshots,
configuration files)

Apparently works in the ancient r5025.


#1 Updated by Helios over 5 years ago

  • Subject changed from [Short description of your bug here (~10 words)] to Errors when running Monster Lab

#2 Updated by seapancake about 5 years ago

Attempted to bisect the issue, assumed 4.0-5025 however it's a dead-end with every single build producing Unknown Opcode. Looked into the Wiki history where compatibility and it looked to be 3.5 however those builds never never reached 5025.

Disabled Dual-core, no longer get Unknown Opcode. Most builds sit at a black screen with no audio after that. Some older builds (e.g 4.0.2-4572) produce Opcode errors regardless although after the errors they render a gray screen with a couple of white pixels at the bottom so possibly trying to render a frame and dying?

#3 Updated by kolano about 5 years ago

Not clear what you mean by the revs not going that high, we were at r5384 with the release of 2.0 (note these were from before the new numbering that came with the transition to GIT). That test report is really old. I think it's referring to the 2.x era r5025 release.

#6 Updated by JMC4789 about 4 years ago

  • Status changed from New to Accepted
  • Priority changed from Normal to High

Last Wii "disc" release not to bot in Dolphin. Can we get this figured out?

#7 Updated by nwplayer123 over 3 years ago

I bought a copy off Amazon for 6 bucks to attempt to help solve it, came out with:

--File Generated by CleanRip v2.0.0--

Filename: RM7E4F
Internal Name: Monster Lab
MD5: 00CC8421583AC459E6CEEC8B5C9A4ACF
SHA-1: 1E39B90C80124C8704ABAD2D25F99B4490929012
CRC32: 0B48EED5
Version: 1.00
Verified: No
Seconds: 1617

(note: it looks like the OP has PAL version, shouldn't be many differences tho)
it's using Bink Video (.bik), but I don't know if that's the issue, I was checking logs and OSReport prints out NAND_ERROR_NOEXISTS, so I dunno if it's trying to find/open a file and can't or something else, but that's all the further I've dove

#9 Updated by Stenzek almost 2 years ago

  • Fixed in set to 5.0-10063
  • Status changed from Accepted to Fixed

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