08734: beezer: Randomly, game boots without sound

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08734	Sound	Major	Always	Jul 21, 2023, 11:18	Jul 22, 2023, 23:12

Tester	hap	View Status	Public	Platform	MAME (Official Binary)
Assigned To	hap	Resolution	Fixed	OS	Windows 10/11 (64-bit)
Status [?]	Resolved			Driver	misc/beezer.cpp
Version	0.256	Fixed in Version	0.257	Build	64-bit
		Fixed in Git Commit	b055029	Github Pull Request #

Summary	08734: beezer: Randomly, game boots without sound
Description	beezer: Randomly, game boots without sound. No sound at all.
Steps To Reproduce	- mame.exe beezer - hold INS to fast forward - if you get sound, exit MAME and retry I can repro it around 1 out of 6 times.
Additional Information	6840 PTM IRQ gets stuck high, causing the sound cpu to enter an infinite irq loop. The VIA writes to the PTM before PTM does its device_reset. ptm6840_device does not zerofill its class variables until reset.
Github Commit

Flags
Regression Version
Affected Sets / Systems	beezer

Attached Files