Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
06027 Crash/Freeze Critical (emulation) Sometimes Sep 5, 2015, 11:40 Apr 16, 2023, 22:17
Tester izius View Status Public Platform MAME (Official Binary)
Assigned To Haze Resolution Fixed OS
Status [?] Resolved Driver
Version 0.165 Fixed in Version 0.239 Build
Fixed in Git Commit edc0dfb Github Pull Request # #8916
Summary 06027: bigkarnk: Game freezes under some circumstances
Description The game could freeze in some particular circumstances, with sprites unable to move and music still playing.
It may happen in level 2, inside the pyramid, if the color-changing ankh is pulled it when it's yellow or black (optional in both cases and not needed to proceed). After doing that, the game will possibly freeze when doing any of the following actions:
1) Jumping on a stairs.
2) Touching the top step of a stairs (only when going left).
3) Landing after walking off a platform*.
4) Landing after a jump, if you hit something in midair (wall, object or enemy)*.
5) Landing after receiving a hard hit (like a kick from the mummy boss in level 2).
6) Jumping on a higher platform (unless you land on the edge).
7) Jumping down to catch a rope (only on the ship in level 3).
(Possibly more?)

* = not always, but eventually it happens.
Steps To Reproduce It might take a few tries to reproduce. Unfortunately, I don't know what exactly triggers the freeze, pulling the ankh when it's yellow or black is only the final part.
Additional Information I currently can't trace a regression (if there is one), given the semi-random nature of this bug.

However, it does seem to happen consistently from recorded INPs. So I have included 2 INPs for comparison, with the freeze happening in only one, even if I did basically the same actions in both.
Github Commit
Regression Version
Affected Sets / Systems bigkarnk
Attached Files
zip file icon bigkarnk (freeze in level 2).zip (53,522 bytes) Sep 5, 2015, 11:40 Uploaded by izius
zip file icon bigkarnk (no freeze).zip (53,130 bytes) Sep 5, 2015, 11:40 Uploaded by izius
png file icon 0000.png (13,728 bytes) Sep 9, 2015, 23:46 Uploaded by Tafoid
Spot the game freezes when using playback
zip file icon bigkarnk (mame 0.220 savestate).zip (11,715 bytes) May 16, 2020, 20:17 Uploaded by MetalGod
There are no relationship linked to this issue.
User avatar
Sep 9, 2015, 23:45
Confirmed using 0.165 and playing back the input that freezes during 2nd level
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Senior Tester
May 16, 2020, 20:14
edited on: May 16, 2020, 20:19
Unable to reproduce this anymore.
It seems it was fixed in 0.215

Uploaded savestate from mame 0.220, so that anybody can test this with the stairs
User avatar
Dec 2, 2021, 00:00
It's not fixed yet.
I have confirmed it in 0.238, and that the trigger is during the second stage, while grabbing the ankh while yellow or black, at the "wrong" time.
The crash is intentional. I have an idea of how to fix it.
User avatar
Dec 2, 2021, 13:56
Possible related to thoop freeze?
User avatar
Apr 14, 2023, 18:30
I cannot reproduce the freeze anymore in 0.253.
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Senior Tester
Apr 15, 2023, 14:28
Does anyone have an objection to resolving this then? Any idea who fixed it, and when?
User avatar
Apr 16, 2023, 13:49
edited on: Apr 16, 2023, 13:51

from what I remember: peterferrie came up with a range of hz at which thoop2 will work(not crash) at, then Haze found a perfect hz in that range which matched up with pcb recordings

peterferrie, legendary fix, buddy :)

best regards,
- dink
User avatar
Senior Tester
Apr 16, 2023, 22:17
Thanks dink :)