03641: sspirits, gground: Only half of the game's frames are rendered.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
03641	Graphics	Minor	Always	Jan 4, 2010, 19:10	Aug 31, 2011, 16:48

Tester	Tain	View Status	Public	Platform	MAME (Official Binary)
Assigned To	M.A.S.H.	Resolution	Fixed	OS	Windows Vista/7 (64-bit)
Status [?]	Resolved			Driver	sega/segas24.cpp
Version	0.136	Fixed in Version	0.143u5	Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	03641: sspirits, gground: Only half of the game's frames are rendered.
Description	MAME reports 100% speed with zero frameskipping, yet the game is running at half the framerate. Due to this, in Scramble Spirits, when the player's ship spawns, it will either appear solid or completely invisible for the duration of the player's invincibility period (when it should be flickering). This makes me think that the game isn't supposed to be running at this framerate. Gain Ground also seems affected by this. The last MAME binary I tried that has these games running at their full framerate was 0.129.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version	0.129u6
Affected Sets / Systems	sspirits, gground

Attached Files

No.05388 Tafoid Administrator Jan 4, 2010, 19:36	I'm not so sure this is a frame rate issue. I isolated a version which this behavior started (0.129u6) as tested with sspirits ship flickering when you start. I'll confirm the behavior, but wait for some knowledge Dev to comment on what is supposed to be correct.
No.05389 Haze Senior Tester Jan 4, 2010, 20:19	the timers are completely broken in system24, hence the bad flckering in crackdown, and the observed issues in gain ground / sspirits. It's the same bug as http://www.mametesters.org/view.php?id=3195 anyway, just different symptoms.
No.05390 Tafoid Administrator Jan 4, 2010, 20:32	Doh.. thanks for the info, Haze. I'll set it up as related.
No.07072 haynor666 Tester Jan 13, 2011, 21:34	Any plans to fix this?
No.07073 Haze Senior Tester Jan 13, 2011, 23:53	Only in as much as there are plans to fix anything else....