00838: fatfury1, ssideki3: NeoGeo possible graphic problems.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
00838	Graphics	Minor	Have not tried	Feb 5, 2008, 15:50	Sep 1, 2010, 16:26

Tester	goatman64	View Status	Public	Platform
Assigned To		Resolution	Bugs That Aren't Bugs	OS
Status [?]	Resolved			Driver	neogeo/neogeo.cpp
Version	0.122u6	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

Summary	00838: fatfury1, ssideki3: NeoGeo possible graphic problems.
Description	Ever since the MAME 0.116u1 rewrite of the Neo-Geo driver I have noticed the following issues: fatfury1: displays black lines across the sky in several levels (especially when you jump). ssideki3: displays moving lines down the left side of the field. In general I believe the MAME 0.116u1 rewrite has greatly improved the driver.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	fatfury1, ssideki3

Attached Files	0000.png (21,189 bytes) Mar 17, 2008, 01:29
	00838-ssideki3-0000.png (22,819 bytes) Mar 17, 2008, 01:32
	00838-ssideki3-0001.png (22,848 bytes) Mar 17, 2008, 01:32

No.00195 Foxhack Tester Mar 17, 2008, 01:34	00838-ssideki3-0000.png and 00838-ssideki3-0000.png are a picture of the same frame, less than a half a second apart. There are some visible changes between the two, which shouldn't happen because the screen / camera is not moving at all. The glitches are subtle but they're noticeable if you switch between the two in an image editing program.
No.00196 zsoltvasvari Developer Mar 17, 2008, 01:49	I won't bother to look at any NeoGeo issues until they are confirmed on a real PCB.
No.06275 Samurai Fox Tester Jun 21, 2010, 20:44 edited on: Jun 21, 2010, 20:53	I have reason to believe that this is an emulation bug and not something that has appeared on the actual hardware. I've yet to find any real videos of the original Fatal Fury on MVS/AES (will continue searching for one), but these lines definitely did not appear before the rewrite. Also, I've found that some videos of Fatal Fury running on the Wii Virtual Console did not exhibit these lines. If the Wii emulation of these games are accurate to the original hardware, it might be an issue worth looking into. These lines are especially noticeable in Spin Master, where the plane is taking off (right after the bomb scene, you can see some lines appear in the sky as the plane is rising ). But as I said, I'll try to do as much research as possible for the real thing.
No.06277 Haze Senior Tester Jun 21, 2010, 22:59 edited on: Jun 21, 2010, 23:09	Wii emulation is far from accurate to the real hardware, it takes a million shortcuts to get it running on the weak hardware of the Wii. I doubt the Sidekicks 3 bug is real, it's just the usual 'graphic glitches on the edge of screen' issue that all NeoGeo games suffer from on real hardware. The Fatal Fury issue could be an off-by-one error in the drawing functions, although I did think that had been fixed. It's possible both bugs come down to exact display timing, which i can assure you the Wii emulation does not get right.
No.06294 AnimalBear Tester Jun 25, 2010, 13:02	The last version on MAME works perfect.
No.06585 Smitdogg Senior Tester Aug 24, 2010, 21:59	ssideki3 glitches on the real cart but it looks like it glitches differently. I uploaded a video (04018).
No.06668 Smitdogg Senior Tester Sep 1, 2010, 16:26	It's a similar situation with Fatal Fury. The glitch is again possibly a little bit different on the real hardware, not seeming to go all the way across the screen so far in my tests but hard to really boil it down that much and definitely happening. I'll upload a video later but this needs to be set as a glitch in the real games and not to possible.