04179: battlane, battlane2, battlane3: [possible] Slowndowns when more enemies appear

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
04179	Speed	Major	Always	Jan 8, 2011, 12:58	Jan 8, 2011, 17:05

Tester	haynor666	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows XP (32-bit)
Status [?]	Confirmed			Driver	technos/battlane.cpp
Version	0.141	Fixed in Version		Build	I686
		Fixed in Git Commit		Github Pull Request #

Summary	04179: battlane, battlane2, battlane3: [possible] Slowndowns when more enemies appear
Description	During playing I noticed strange slowdowns (frame skipping) when more enemies appear and I shoot. When I stop shooting speed returns almost to normal.
Steps To Reproduce	Start game with with no frame skipping and with speed info on the upper right corner of screen. Also watch attract mode until you see first barrier breaking, notice slowdowns is present even if screen is not scrolling.
Additional Information	Please notice that during playing speed info does not show any frame skipping or slowdown. I've seen this behaviour in other games recently. I just to need retest some.
Github Commit

Flags	Possible
Regression Version
Affected Sets / Systems	battlane, battlane2, battlane3

Attached Files

No.07035 Haze Senior Tester Jan 8, 2011, 14:30 edited on: Jan 8, 2011, 14:31	original games have slowdown too... we don't need reports for every game which has slowdown because in most cases it's likely to be correct. is there any reason to think this isn't behaviour of the original? Also, if you're running Windows 7 with a poor graphics card it seems to introduce this kind of skipping into ALL games (even Pacman) if something else is busy in the background. MAME doesn't display any skipping in those cases even if it clearly is. Just a thought, you state XP tho, so I doubt that's the case here.
No.07036 haynor666 Tester Jan 8, 2011, 16:33	GF 8800GTS Core2Duo 3,20Ghz, XP Pro SP3. Mostly when original hardware have slowndowns it simply slown without frame skipping. In this case almost every time when you shoot game slow down. I really doubt that developer release this game with slowdown in more 50% of game. Occasional slowdowns - yes, it happens on real hardware. Many slowdowns or slowdown with long duration - I don't think so. Tomorrow I'll switch to XP SP2 x64 and ATI X300SE and I compare with 64bit build.
No.07037 hap Developer Jan 8, 2011, 16:47	I can confirm that slowdowns are very obvious, but won't confirm this bug report; I agree with Haze. CPU freq hasn't been confirmed though, anyone here owns the PCB?
No.07038 haynor666 Tester Jan 8, 2011, 16:54	I tried find some video from real hardware but without any luck. Maybe Stefan could help.
No.07039 hap Developer Jan 8, 2011, 16:59	Ok, I changed CPU freq to a more obvious 1.5mhz (same as xain d sleena, also a 1986 technos game with m6809) There are still some minor slowdowns though. I'll leave this report open until we have proof from the PCB. Proof via game footage is useful too.
No.07041 Tafoid Administrator Jan 8, 2011, 17:05	Confirmed. Set as possible pending pcb investigation.