01182: ssf2xj: The entire screen glitches up every once in a while.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
01182	Graphics	Minor	Always	Feb 12, 2008, 09:41	Jul 19, 2010, 15:29

Tester	Smitdogg	View Status	Public	Platform
Assigned To		Resolution	Bugs That Aren't Bugs	OS
Status [?]	Resolved			Driver	capcom/cps2.cpp
Version	N/A	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

Summary	01182: ssf2xj: The entire screen glitches up every once in a while.
Description	The entire screen glitches up every once in a while, it's pretty rare, sometimes just once in an entire game (beating the whole game) but for 1 frame every once in a while, either the whole screen is scrambled garbage or most of it is. It's a glitch in the original game. Here is a video of the original PCB running: http://smitdogg.mameworld.info/mametesters/ssf2xj.mpg
Steps To Reproduce
Additional Information
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	ssf2xj

Attached Files	0000.png (27,399 bytes) Mar 19, 2008, 09:33

No.00254 Layne Tester Mar 19, 2008, 09:33 edited on: Mar 19, 2008, 09:35	I captured the frame of this glitch into the intro, it happens 2 times on MAME, when Ryu screen go to Cammy stage screen. Really hard to caught this glitch!
No.00272 Foxhack Tester Mar 20, 2008, 02:32 edited on: Mar 20, 2008, 04:32	It actually happens four times. Whenever the screen switches from Ryu to Chun-Li or Cammy, that glitch happens. I know very little about the system but it reminds me of how NES games glitch out for an instant while they swap out the graphics loaded into memory needed for different levels. I don't remember seeing this on a real machine, but I only played the game a few times back in the day.
No.00274 Tafoid Administrator Mar 20, 2008, 02:48	I'll confirm the bug - keep it as possible since we have recent observations and a snap.
No.02388 BMF54123 Tester Sep 7, 2008, 07:42	If it helps, I can confirm that X-Men: Children of the Atom has glitches between intro scenes on the real hardware, though not quite to that extent (usually just misplaced background layers and missing sprites). It's very similar to what happens when you soft-reset the game. I'm guessing it takes a couple frames to swap out the backgrounds, but why didn't Capcom just turn off the screen, or darken the palette?
No.06386 Layne Tester Jul 19, 2010, 14:01	Just verified on a real pcb, it's not a MAME bug, but a bug of the original game. Soon Smitdogg will upload a video taken from the same pcb in MAME as proof.