07389: inferno: Wrong DAC sound

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07389	Sound	Minor	Always	Aug 5, 2019, 11:26	Mar 7, 2021, 14:41

Tester	M.A.S.H.	View Status	Public	Platform	MAME (Official Binary)
Assigned To	Osso	Resolution	Fixed	OS	Windows 10 (64-bit)
Status [?]	Resolved			Driver	midway/williams.cpp
Version	0.212	Fixed in Version	0.230	Build	64-bit
		Fixed in Git Commit	9097e89	Github Pull Request #

Summary	07389: inferno: Wrong DAC sound
Description	Since MAME 0.211 Inferno (Williams) is playing the wrong DAC sound.
Steps To Reproduce	The PIA6821 improvements in MAME 0.211 makes the problem. Do i revert the PIA changes the sound in Inferno works again! See https://git.redump.net/mame/commit/?id=2e0f4af6ee693fb6f40183bc60ef16db826c8780 PIA6821 improvements: Fixed method names in comments. Removed unused set_port_a_z_mask calls and m_port_a_z_mask variable. For port A reads, only use the DDR for reading pins unless. Provide an override option when a device depends on slightly undefined behavior of an external device driving the pins and changing the value read. One board seems to need this (coinmstr). I don't have the schematics, but it seems it uses this to check its meter operation [Mike Harris].
Additional Information
Github Commit

Flags
Regression Version	0.211
Affected Sets / Systems	inferno

Attached Files