08540: nes [btoads and clones]: Game crashes at the start of Level 3

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08540	Crash/Freeze	Critical (emulation)	Always	Dec 31, 2022, 07:50	Jan 2, 2023, 00:22

Tester	Foxhack	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows 10/11 (64-bit)
Status [?]	Confirmed			Driver	nintendo/nes.cpp
Version	0.251	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	08540: nes [btoads and clones]: Game crashes at the start of Level 3
Description	The game plays normally for the first two stages, but crashes to a black screen when you begin Stage 3. The normal background music plays but the game does not progress past that point. I tested this with the US and European versions, and it also happens in a hacked Brazilian bootleg that I was testing for a friend. I have not tested this with the Japanese version. I've attached zipped savestates for btoads and btoadsu made with the standard release build from mamedev just as stage 2 ends, before the cutscenes. This also happened in 0.250, so I'm not sure when it began.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	nes [btoads and clones]

Attached Files	btoads-btoadsu-nes-crash.zip (42,214 bytes) Dec 31, 2022, 07:50 Uploaded by Foxhack

No.20990 kmg Senior Tester Jan 1, 2023, 20:32	I tested the Japanese version and it hangs in the same place. I also tried btoadsu in 0.228 and it has the same issue. Furthermore, there's a bannister forums post from 2009 saying the game breaks on level 3. Maybe MAME's never made it farther than that.
No.20991 Foxhack Tester Jan 2, 2023, 00:22 edited on: Jan 2, 2023, 00:23	It wouldn't be the first Rare developed game that makes MAME go nuts. See 06902 and 05825...