06572: bnstars bnstars1: Incorrect emulation speed

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06572	Speed	Major	Always	May 1, 2017, 14:41	May 2, 2020, 05:15

Tester	system11	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows Vista/7/8 (64-bit)
Status [?]	Acknowledged			Driver	jaleco/ms32.cpp
Version	0.185	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	06572: bnstars bnstars1: Incorrect emulation speed
Description	Original hardware seems to run at 30fps for this game, for example the sound timing during the intro animations is incorrect as the animation completes before the sound (sound is the correct speed). Results in dramatically different gameplay.
Steps To Reproduce
Additional Information	Almost seems a shame to fix it as it's better at 60, but it is currently incorrect.
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	bnstars bnstars1

Attached Files

No.13814 Haze Senior Tester May 1, 2017, 17:48 edited on: May 1, 2017, 17:49	I wonder if this has something to do with it originally being a dual screen game on dedicated hardware while the ms32 version is a cut-down single screen version. it would suggest that the interrupts are programmable tho
No.13815 system11 Senior Tester May 2, 2017, 00:46 edited on: May 2, 2017, 00:59	I've been unable to track down a twin screen version so I don't know if that runs at the same speed. It's currently 60 same as the MS32 version in emulation. Unsure which type this is but it runs like mine: http://www.nicovideo.jp/watch/sm3589271
No.17072 MetalGod Senior Tester Oct 11, 2019, 17:35	Twin screen version:
No.17594 system11 Senior Tester May 2, 2020, 05:14	I now own the twin screen version too and can confirm it runs 30fps and effectively half the speed as a result, making it much easier.