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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
09399 Crash/Freeze Critical (emulation) Always Mar 2, 2026, 17:06 1 day ago
Tester Ziggy View Status Public Platform MAME (Official Binary)
Assigned To Duke Resolution Fixed OS Windows (x64)
Status [?] Resolved Driver
Version 0.286 Fixed in Version 0.290GIT Build x64
Fixed in Git Commit 0e0f27b Github Pull Request #
Summary Regresssion 09399: mslug6, basschal, basschalo, xtrmhunt, vfurlong: Games fail to boot to attract mode / go in-game
Description Metal Slug 6 goes in-game in 0.276, but not in 0.277. After MAME warning screens, there's just a blank screen ever since 0.277 up to and including the latest MAME version 0.286.
Steps To Reproduce Using default mame.ini, run "mame mslug6" on command line.
Additional Information Added extra sets that have been impacted.
Github Commit
Flags Regression
Regression Version 0.277
Affected Sets / Systems mslug6, basschal, basschalo, xtrmhunt, vfurlong
Attached Files
 
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Notes
9
User avatar
No.24194
Haze
Senior Tester
Mar 2, 2026, 18:05
from the 0.277 whatsnew this jumps out as a candidate

-Implemented specific SH3/SH4 chips & pass the required endian into the constructor, SH4 internal registers now work when using big
 endian. The debugger is now aware that the SH3/SH4 has an MMU. [smf]
User avatar
No.24195
Ziggy
Tester
Mar 2, 2026, 18:41
That would be commit:
https://github.com/mamedev/mame/commit/b26662f1bba6809df145d9e8b3f78f66e3a7c7db#diff-6f5b5ca404e809dbf4327835e76b3de2f042f1d19f5d9ad3f907549d9e6c24ac

That commit does change sega/dc.h which is included by sega/dc_atomiswave.h. It could be something else, but pointing out that you might be right.
User avatar
No.24196
Haze
Senior Tester
Mar 2, 2026, 19:42
if somebody could confirm it's that then it would help narrow things down at least
User avatar
No.24197
Robbbert
Moderator
Mar 2, 2026, 20:21
The game works, it just takes 5 minutes of a black screen before it suddenly springs to life.

Also applies (at my last testing) to basschal, basschalo, xtrmhunt.

vfurlong says NOW LOADING and then you have to wait the 5 minutes.
User avatar
No.24198
Haze
Senior Tester
Mar 2, 2026, 20:27
weird, but still a regression, it shouldn't be taking 5 minutes to boot
User avatar
No.24199
Ziggy
Tester
Mar 2, 2026, 22:52
It is weird. I tried it again and held 'insert' key to speed up the wait time at around 375% and it did run after a minute or more.
User avatar
No.24316
Robbbert
Moderator
Apr 14, 2026, 04:23
Noticed that kofnw and kofnwj no longer boot, stuck at black screen. Have to use -nodrc to play them.
User avatar
No.24747
JimCarlTay
Senior Tester
1 day ago
Fixed in commit 0e0f27b by Duke.

The cases with kofnw and kofnwj have been fixed in an earlier commit, but I can't find out which.
User avatar
No.24748
JimCarlTay
Senior Tester
1 day ago
UPDATE:
kofnw and kofnwj: Fixed in commit a60f95e by R. Belmont. I'm going to split these to another report.
Other systems affected by this issue: Fixed in commit 0e0f27b by Duke.