02706: hngmnjpm: uPD plays garbage on high score screen

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
02706	Sound	Minor	Have not tried	Dec 3, 2008, 22:34	Dec 5, 2008, 20:39

Tester	Luigi30	View Status	Public	Platform	MAME (Self-compiled)
Assigned To		Resolution	Open	OS
Status [?]	Confirmed			Driver	jpm/jpmimpct.cpp
Version	0.128u4	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

Summary	02706: hngmnjpm: uPD plays garbage on high score screen
Description	If you set a high score on Hangman, garbage comes out of the sample player for a few seconds before it plays the right sounds.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	hngmnjpm

Attached Files	hangman.mp3 (174,528 bytes) Dec 4, 2008, 00:55
Attached Files	savestate.zip (474,232 bytes) Dec 4, 2008, 00:55

No.03212 Fujix Administrator Dec 4, 2008, 00:54	Confirmed the issue. Attached mp3 clip and save state.
No.03232 Phil Bennett Developer Dec 5, 2008, 20:39	Thanks. The game is trying to play a sound while the upd7759 is already active. This request is (correctly) ignored by the chip but the game also switches the sound ROM bank which causes the active playback to mess up. I think this is a timing issue. The Impact games seem to be running too fast. For example, the paper shuffling sequence countdown in Hangman runs out before the crosshair reaches the bottom left card.

No.03212

Fujix

Administrator

Dec 4, 2008, 00:54

Confirmed the issue.
Attached mp3 clip and save state.

No.03232

Phil Bennett

Developer

Dec 5, 2008, 20:39

Thanks.

The game is trying to play a sound while the upd7759 is already active. This request is (correctly) ignored by the chip but the game also switches the sound ROM bank which causes the active playback to mess up.

I think this is a timing issue. The Impact games seem to be running too fast. For example, the paper shuffling sequence countdown in Hangman runs out before the crosshair reaches the bottom left card.