05782: choplift: misaligned graphics on levels 3 & 4

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
05782	Graphics	Minor	Always	Nov 12, 2014, 23:14	8 days ago

Tester	zaxxon	View Status	Public	Platform	MAMEUI
Assigned To	hap	Resolution	Fixed	OS	Windows Vista/7 (32-bit)
Status [?]	Resolved			Driver	sega/system1.cpp
Version	0.155	Fixed in Version	0.272GIT	Build	Normal
		Fixed in Git Commit	671e521	Github Pull Request #

Summary	05782: choplift: misaligned graphics on levels 3 & 4
Description	note: the two clone sets 'chopliftbl' and 'chopliftu' do not have this problem:- for the parent set: choplifter (8751 315-5151): on level 3, when you are flying the helicopter and scrolling the screen, the large yellow trees graphics become misaligned (see the snapshot picture below). the alignment is ok when the screen is not scrolling. a save state (for mame 0.155) is provided. here is a video (mame 0.155) showing the level 3 issue: http://www.mediafire.com/download/b9l4loyjb4q6bdh/choplift.avi EDIT: i just noticed the graphics are also misaligned in a similar way on the final level, level 4. (level 4 save state now added below). i dont know if it is related to the problem, but levels 1 and 2 contain the fancy parallax scrolling ground, but levels 3 and 4 do not.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	choplift

Attached Files	choplift.png (27,090 bytes) Nov 12, 2014, 23:14 Uploaded by zaxxon
	choplift level 3.zip (6,152 bytes) Nov 13, 2014, 00:31 Uploaded by zaxxon choplift - save state level 3 (mame 0.155)
	choplift level 4.zip (6,804 bytes) Nov 13, 2014, 00:31 Uploaded by zaxxon choplift - save state level 4 (mame 0.155)

No.11243 B2K24 Senior Tester Nov 13, 2014, 07:31	zaxxon, thank you for the save states. In the future, please take snap shots with the F12 key only as stated in the Rules and Guidelines. I'll confirm this as I'm seeing the same behavior here.
No.11244 zaxxon Tester Nov 13, 2014, 10:28	ah ok sorry about that, i will remember for next time
No.11250 Haze Senior Tester Nov 14, 2014, 16:20 edited on: Nov 14, 2014, 16:20	there are reports on MARP that the parent set crashes sometimes too, could be the MCU rom that was hand-repaired (afiak) is still bad.
No.11251 zaxxon Tester Nov 14, 2014, 22:01	there's some chat about the crash from others (plus a screenshot of the crash) here: http://www.jammaplus.co.uk/forum/forum_posts.asp?TID=66193&PID=642886&title=2014-highscore-challenge-round-20choplifter#642886
No.16698 kazblox Tester Jul 28, 2019, 13:56 edited on: Jul 28, 2019, 13:57	According to Osso, the correct dump of the MCU does not fix the misalignment bug. Has anyone checked if it happens on real hardware?
No.16699 MetalGod Senior Tester Jul 28, 2019, 15:20 edited on: Jul 29, 2019, 18:44	I've seen videos on the internet which do not present the issue, but they could be the clones not affected by this bug.
No.22419 hap Developer 10 days ago edited on: 8 days ago	I tried to force 1 screen update per frame, and I tried to force an update at each scanline, neither affected this issue. It's suspicious that it works fine on chopliftu...