01101: elvactr: The background seems to "skip" where it is supposed to scroll at the beginning of the 3rd stage.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
01101	Graphics	Minor	Have not tried	Feb 11, 2008, 14:52	May 25, 2024, 23:06

Tester	Nerox91	View Status	Public	Platform
Assigned To	hap	Resolution	Fixed	OS
Status [?]	Resolved			Driver	taito/taito_f3.cpp
Version	0.62	Fixed in Version	0.203	Build
		Fixed in Git Commit		Github Pull Request #

Summary	01101: elvactr: The background seems to "skip" where it is supposed to scroll at the beginning of the 3rd stage.
Description	At the very beginning of the level 3, when I move the guy to the first elevator, you'll see that the background seems to ''skip'' where it is supposed to scroll.
Steps To Reproduce
Additional Information
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	elvactr

Attached Files	Mission 4.png (23,740 bytes) Jun 17, 2008, 22:54
	Mission 3.png (20,081 bytes) Jun 17, 2008, 22:54
	Mission 5.png (28,372 bytes) Jun 17, 2008, 22:55
	elvactr.zip (611,398 bytes) Oct 26, 2018, 10:39 Uploaded by MetalGod

No.01293 LastNinja2 Tester Jun 17, 2008, 22:54 edited on: Jun 17, 2008, 22:58	I can confirm this report and add further information. The issue doesn't always happen. It appears only in specific moments of the game, for example at the beginning of mission 2, 3 and 4. It also happens in the middle of some levels (see attached snaps for the specific points), always in the same places. Oddly enough, it seems to appear almost always in some points (for example at the beginning of Mission 4) and less often in others (the beginning of mission 3).
No.15621 MetalGod Senior Tester Oct 26, 2018, 09:57 edited on: Oct 26, 2018, 10:54	Tested in mame 0.202 I've uploaded savestates of the beginning of each level. Some indications of where the skip-scroll bug ocurrs in each level: Mission2: right at the beginning, walk right Mission3: right at the beginning, walk right Mission4: After a few minutes playing the level (see attached image). Mission5: I haven't been able to reproduce this one. Anyway, it is supposed to ocurr in the beginning of the level, after descending a little (see attached image). These bugs are random
No.15623 MetalGod Senior Tester Oct 26, 2018, 10:38 edited on: Oct 26, 2018, 10:58	Some evidence comparing mame emulation with the arcade pcb: Mame emulation full gameplay: Some of the reported skip scroll bugs can be seen in this gameplay: 5:57: Mission 3 11:36: Mission 4 Regarding missions 2 and 5 I haven't seen any scroll bug in that gameplay, but according to LastNinja2 these bugs are a random thing. Original arcade pcb full gameplay: In the arcade pcb none of the reported scroll bugs ocurr: 2:59: Mission 2 7:03: Mission 3 13:58: Mission 4 18:30: Mission 5
No.21538 ywy Tester Jun 10, 2023, 16:46	fwiw i couldn't reproduce this in recent versions of mame but saw it immediately in 0.202. probably a 68k bug, resolved since?
No.21539 ICEknight Tester Jun 11, 2023, 02:48	Just played up to Mission 5 and didn't see any scrolling problems. The momentarily visible sprites before the fade-ins are still there, though.
No.21542 dink Tester Jun 15, 2023, 13:21	I'm pretty sure this was fixed by Hap's chk2cmp2 fix or the pack/unpk fix, as the problem no longer exists on fbneo side too