07274: maciici: Sound breaks/disappears when played several channels at once.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07274	Sound	Minor	Always	Mar 31, 2019, 19:14	Apr 2, 2019, 01:59

Tester	Hirudov	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS
Status [?]	Acknowledged			Driver	apple/mac.cpp
Version	0.207	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

Summary	07274: maciici: Sound breaks/disappears when played several channels at once.
Description	The sounds simply disappears when playing several channels at once. The bug is very easy to reproduce in example with the game Prince of Persia. Just go in the first level to any room where sound is produced (falling plates or doors) and the sound simply mutes by itself.
Steps To Reproduce	Start the game Prince of Persia and wander around the first level. It can be reproduced in many other games and even some applications. For example in any of the games in the Microsoft Arcade pack - Asteroids, Centipede etc..
Additional Information	This behavior is present since the early stages of the driver.
Github Commit

Flags
Regression Version
Affected Sets / Systems	maciici

Attached Files

No.16284 Tafoid Administrator Apr 2, 2019, 01:59	Nothing can be done until VIA6522 emulation is rewritten/completed. As a result all MAC drivers are sent to MACHINE_NOT_WORKING (MNW). I've acknowledged the bug for later reference but no more bugs need to be reported for these drivers or any machines marked NOT WORKING unless heavy regression is detected.