03467: firebarr: Extensive issues with Tilemaps/Sprites

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
03467	Graphics	Major	Always	Oct 7, 2009, 21:57	Dec 19, 2010, 21:02

Tester	tititou	View Status	Public	Platform	MAME (Official Binary)
Assigned To	Kale	Resolution	Fixed	OS	Windows 2000
Status [?]	Resolved			Driver	irem/m107.cpp
Version	0.134u2	Fixed in Version	0.140u3	Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	03467: firebarr: Extensive issues with Tilemaps/Sprites
Description	Not 100% it is a bug as I have never played with the real game but it looks so strange that something must be wrong somewhere... I've tried to remove some lines in m107_screenrefresh (src/mame/video/m107.c) and it gives me a "normal" display.
Steps To Reproduce	Just run the game.
Additional Information	Tested with 0131 official build --> same behaviour. Tested with 0134 official build --> same behaviour. I don't have older realeases
Github Commit

Flags
Regression Version
Affected Sets / Systems	firebarr

Attached Files	0001.png (32,420 bytes) Oct 7, 2009, 21:57

No.05014 tititou Tester Oct 7, 2009, 22:02 edited on: Oct 7, 2009, 22:03	Hmmm, found some screen shot on the net with the same strange display, and a note on http://maws.mameworld.info/maws/set/firebarr stating that Fire Barrel (Irem 1993) has a protection device controlling the sprites (garbage sprites/graphics). So this must be a known issue. Please just close the report and sorry for the noise.
No.05015 Haze Senior Tester Oct 8, 2009, 13:37	I don't think it's an invalid report. It's marked as imperfect graphics, yes, but AFAIK bugs were being allowed in such cases now anyway, to properly document them? It's been broken since it was added anyway, I doubt it's protection, from old conversations with Kale I think we speculated that it's probably a tilemap wrap-around issue, ie, they shouldn't wrap around but do. I think that such bugs should remain open so that discussion can be added and recorded on them, and any additional information about them can be added.
No.05016 Tafoid Administrator Oct 8, 2009, 16:28	Good point. There really isn't a source mention of this issue (at least not a clear one) so having a documented issue for this case would be helpful. I'll change to confirmed to allow discussion to exactly what is wrong/how to fix.
No.05031 Kale Developer Oct 14, 2009, 12:07 edited on: Oct 14, 2009, 12:08	Probably the best solution is to rewrite the video emulation from scratch, imho with an hardcore approach (i.e. custom code instead of tilemaps) due of the weirdness of the rowscroll. Also, a trojan program executed on the real HW might help a lot (iirc there are many undocumented registers there).