09290: supergm3: Snow Bros broken in Super Game III in newer MAME

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
09290	Crash/Freeze	Minor	Always	Oct 18, 2025, 01:57	Oct 19, 2025, 05:34

Tester	Dumple	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows (x64)
Status [?]	Confirmed			Driver	nintendo/multigam.cpp
Version	0.281	Fixed in Version		Build	x64
		Fixed in Git Commit		Github Pull Request #

Summary	09290: supergm3: Snow Bros broken in Super Game III in newer MAME
Description	In the multi-nintendo game "Super Game III" (rom supergm3), Snow Bros is broken in newer versions of MAME. (Broken in 0.257 and 0.280, working in 0.255 and 0.253)
Steps To Reproduce	Run supergm3 in a recent version of MAME. Select game 06, Snow Bros, and hit start. The game almost immediately goes to an unresponsive gray screen.
Additional Information
Github Commit

Flags
Regression Version	0.256
Affected Sets / Systems	supergm3

Attached Files