Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
01101 Graphics Minor Have not tried Feb 11, 2008, 14:52 Jun 15, 2023, 13:21
Tester Nerox91 View Status Public Platform
Assigned To Resolution Open OS
Status [?] Confirmed Driver
Version 0.62 Fixed in Version 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
png file icon Mission 4.png (23,740 bytes) Jun 17, 2008, 22:54
png file icon Mission 3.png (20,081 bytes) Jun 17, 2008, 22:54
png file icon Mission 5.png (28,372 bytes) Jun 17, 2008, 22:55
zip file icon (611,398 bytes) Oct 26, 2018, 10:39 Uploaded by MetalGod
There are no relationship linked to this issue.
User avatar
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).
User avatar
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
User avatar
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
User avatar
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?
User avatar
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.
User avatar
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