05260: demoderb: Cars can not reach the right edge

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
05260	Graphics	Minor	Have not tried	Aug 9, 2013, 21:44	Dec 18, 2018, 06:13

Tester	M.A.S.H.	View Status	Public	Platform	MAME (Self-compiled)
Assigned To		Resolution	Bugs That Aren't Bugs	OS	Windows XP
Status [?]	Resolved			Driver	midway/mcr.cpp
Version	0.149u1	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	05260: demoderb: Cars can not reach the right edge
Description	In MAME's Demolition Derby you can not reach the right edge. Only at the up, down and left side. In the arcade version you can reach all edges (see picture). Watch this Youtube video:
Steps To Reproduce
Additional Information
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	demoderb

Attached Files	demoderb.png (365,501 bytes) Aug 9, 2013, 21:44 Uploaded by M.A.S.H.

No.09720 NekoEd Senior Tester Aug 9, 2013, 23:25	I'm not sure this is a graphics bug, seems more like a logic error to me....
No.09721 Haze Senior Tester Aug 10, 2013, 14:59	I see nothing in the video to suggest you can drive in a straight line into the border any further than in MAME, looks more like if you do a quick 180 turn on the wheel you can end up there.
No.09722 M.A.S.H. Senior Tester Aug 10, 2013, 17:26	No Haze, a quick 180 turn on the wheel doesn't work. Look in MAME you can drive straight into left, up and down border line. But not into the right line. You can not reach it! Test this with MAME...
No.09723 Haze Senior Tester Aug 10, 2013, 21:21	yes, I have tested this with MAME, and I see nothing in the video that is different to MAME (and plenty to suggest the limit is in the same place as MAME) even the screenshots you post look like the middle of a turning operation.
No.09724 NekoEd Senior Tester Aug 11, 2013, 00:53	Sorry, Haze, but I have to disagree. I tried to reproduce a "turning operation" like you say and I can't; there's a hard limit in MAME at the very edge of the curb on the right side, whereas the limits on the other three reach the fence.
No.09725 Haze Senior Tester Aug 11, 2013, 13:43 edited on: Aug 11, 2013, 13:43	yes, I agree, there is a different limit on the right hand side. it looks to me like the limit is exactly the same as MAME in the video tho and that this is 'BTNAB' material.
No.09728 NekoEd Senior Tester Aug 12, 2013, 00:22	I took a close look at the video, and the limit is definitely to the fence on the right side in the video. You can see the car make it all the way to the right fence at least twice after he starts playing at 2:00 into the video; this is impossible to do in MAME.
No.15909 MetalGod Senior Tester Dec 14, 2018, 12:40 edited on: Jan 11, 2019, 12:42	It's a clear BTANB. Same behaviour on the arcade pcb: 4:05 blue bottom car goes right, then left. Right side border cannot be reached and left can be reached, same as mame 4:28 blue top car checks UP border behaves exactly as in mame. That border can be reached. 4:32 blue bottom car checks DOWN border is reachable, as in mame.